579 views and not a so saying shit, proves these cars are bad, wow.
240sx AUTO Vert Jerking/Bogging under load/acceleration (HELP NEEDED)
The link to my issue and my other post is below...
Okay, I have searched and searched, I have also made a post here. However, I have not solved my issue, nor has anyone responded after a few months. THEREFORE, I hope I can end it all here. I hope I am not being as annoying as my 240sx
Took it to a local well-known mechanic, but he didn't end up driving it enough to figure out the problem I asked him to address originally. So I paid him to at least know the TPS is off when it comes to its voltage under throttle. However, after the car warms up and is under load, it jerks, and sputters, then the rpm drops in a second and keeps doing it until I release the throttle. You can avoid it by giving it minimal throttle, but it is completely impractical when it comes to highway driving.
I don't want to regret buying this car. I am just a broke college student trying to enjoy a vehicle, not beat the shit out of it...
Parts addressed:
MAF (3 times, I have changed the MAF, MAF THIS MAF THAT... yada yada), there's no reason 2 different aftermarkets MAFs wouldn't work right? I also tried an old OE MAF and it still didn't change anything...
If you are super adamant that it's the aftermarket MAF, tell me where I can get an OE or reputable aftermarket MAF...
TPS (currently reading the wrong voltages, and causing hard shifts, but I think that's its own issue because before I fucked up the voltages myself, it had the same bogging/jerking issue with the old TPS)
Coolant Temp Sensor
All injectors
Spark Plugs and Wires
Cap and Rotor
Fuel Filter (prev owner)
Fuel Pump(prev owner)
I was thinking maybe the air filter, but who knows, apparently not a soul knows anything about this issue.
Found countless non-resolved posts, it's actually ridiculous... I assume they either solved the issue and never went back to the OP to mention it, or they sold their vehicle. But personally, I am not ignorant of the fact that others need a solution to the same issue I'm having, and I am just desperately waiting for someone to have a Deja Vu watching the video below and getting back to me...
Here's a video of the issue:
video
Here's my original post:
Original Post
Once my issue is resolved, I will do a write-up of every part, and why you change it because THAT is how many forums I have read through...
Okay, I have searched and searched, I have also made a post here. However, I have not solved my issue, nor has anyone responded after a few months. THEREFORE, I hope I can end it all here. I hope I am not being as annoying as my 240sx
Took it to a local well-known mechanic, but he didn't end up driving it enough to figure out the problem I asked him to address originally. So I paid him to at least know the TPS is off when it comes to its voltage under throttle. However, after the car warms up and is under load, it jerks, and sputters, then the rpm drops in a second and keeps doing it until I release the throttle. You can avoid it by giving it minimal throttle, but it is completely impractical when it comes to highway driving.
I don't want to regret buying this car. I am just a broke college student trying to enjoy a vehicle, not beat the shit out of it...
Parts addressed:
MAF (3 times, I have changed the MAF, MAF THIS MAF THAT... yada yada), there's no reason 2 different aftermarkets MAFs wouldn't work right? I also tried an old OE MAF and it still didn't change anything...
If you are super adamant that it's the aftermarket MAF, tell me where I can get an OE or reputable aftermarket MAF...
TPS (currently reading the wrong voltages, and causing hard shifts, but I think that's its own issue because before I fucked up the voltages myself, it had the same bogging/jerking issue with the old TPS)
Coolant Temp Sensor
All injectors
Spark Plugs and Wires
Cap and Rotor
Fuel Filter (prev owner)
Fuel Pump(prev owner)
I was thinking maybe the air filter, but who knows, apparently not a soul knows anything about this issue.
Found countless non-resolved posts, it's actually ridiculous... I assume they either solved the issue and never went back to the OP to mention it, or they sold their vehicle. But personally, I am not ignorant of the fact that others need a solution to the same issue I'm having, and I am just desperately waiting for someone to have a Deja Vu watching the video below and getting back to me...
Here's a video of the issue:
video
Here's my original post:
Original Post
Once my issue is resolved, I will do a write-up of every part, and why you change it because THAT is how many forums I have read through...
1 - 6 of 6 Posts
9
A lot of those views are probably bots too.
I had a similar stuttering issue.
I could be driving and then out of nowhere, it would buck and lose all power.
Eventually it would just shut off the engine and would not restart.
Think rolling anti-lag and then it just dies.
What I did was get a Z32 fuel filter, oem spec fuel pump, knock sensor, and MAF.
Everything was good after that, but it still has trouble starting ( from sitting overnight) so I'm thinking ignition switch.
What I recommend for you is to get a consult port adapter.
This way you can see what the hell all the sensors are doing and pinpoint it better.
Hold on, let me go find it.
You can do this a few ways. If you are really strapped for cash, then there is a way to read the codes from the actual ecu using the blinking light method.
![www.240sxforums.com]()
Just Codes v1.1
Yes I know there was an "Just Codes thread but I felt it was a little to General in the "Codes" it Covered so.. For this Thread instead of Just Chassis Codes and Engine Codes, it Will be More Organized and Include Diagnotic Trouble Code's as well A.K.A. OBD Codes (OBD-I & II share the same...
![www.240sxforums.com]()
www.240sxforums.com
You can download the factory service manual which is free and see what you need to do.
Download the factory service manual, from here
![forums.nicoclub.com]()
240sx FSM, Full Service Manuals, S13, S14, KA24E, KA24DE - Nissan Forum | Nissan Forums
![forums.nicoclub.com]()
forums.nicoclub.com
![www.240sxforums.com]()
Get your FSMs' HERE!
Hey whats up everyone. I noticed a lot of people are asking a lot of the same questions without searching or first looking at a factory service manual. There are also people that have answered questions that are wrong, according to the FSM. The FSM contains everything you need to know about the...
![www.240sxforums.com]()
www.240sxforums.com
To be better at keeping the car running well, I suggest this route.
Get yourself a consult cable. They are really freaking cheap. These are your link to what the car is doing. It's kind of like an obd2 port but since the car is older than 1996, it's a Nissan specific connector known as the consult port. It should be located right near your fusebox in the driver or passenger side footwell.
Consult cable:
![www.ebay.com]()
14 Pin For Nissan Consult Interface USB Car Diagnostic OBD Fault Code Cable Tool | eBay
Find many great new & used options and get the best deals for 14 Pin For Nissan Consult Interface USB Car Diagnostic OBD Fault Code Cable Tool at the best online prices at eBay! Free shipping for many products!
www.ebay.com
Doesnt have to be that one. But you want it for a Nissan.
PLMS Developments - Consult Cables
PLMS Developments
www.plmsdevelopments.com
![www.240sxforums.com]()
OBD1 Consult Cable
I have a 1991 240sx Hatch I was looking at ways to get live data and to adjust small things like the IACV and see the timing in live data. The Nissan dealership has an awesome consult pad/computer thing and I noticed they used a cable similar to OBD2 plugs. I did some research and came up with...
![www.240sxforums.com]()
www.240sxforums.com
Ebay has these for really cheap. I'm talking like $20.
Then you need a laptop or a tablet that can run some software. I've used ECUtalk with some success in the past. It's free and it lets you read codes and see the sensor readings.
ECUTalk - Consult Software
ECUTalk - Home of projects targeting the NISSAN Consult diagnostic protocol
www.ecutalk.com.au
So once you get your cable, software, and laptop all set up, you can just plug in and see if any codes pop up. Check these codes against what the FSM has.
You can also see the voltages for each sensor. You can sit in your driveway and just look at what the car is doing. You can make them all look like dial gauges so if something is pegged at one value or is erratic, you can see it visually.
You can also let someone else drive it around while you monitor and see what's happening.
Hope you get it figured out. Don't be like me and throw a crap load of parts at it.
I had a similar stuttering issue.
I could be driving and then out of nowhere, it would buck and lose all power.
Eventually it would just shut off the engine and would not restart.
Think rolling anti-lag and then it just dies.
What I did was get a Z32 fuel filter, oem spec fuel pump, knock sensor, and MAF.
Everything was good after that, but it still has trouble starting ( from sitting overnight) so I'm thinking ignition switch.
What I recommend for you is to get a consult port adapter.
This way you can see what the hell all the sensors are doing and pinpoint it better.
Hold on, let me go find it.
You can do this a few ways. If you are really strapped for cash, then there is a way to read the codes from the actual ecu using the blinking light method.
Just Codes v1.1
Yes I know there was an "Just Codes thread but I felt it was a little to General in the "Codes" it Covered so.. For this Thread instead of Just Chassis Codes and Engine Codes, it Will be More Organized and Include Diagnotic Trouble Code's as well A.K.A. OBD Codes (OBD-I & II share the same...
You can download the factory service manual which is free and see what you need to do.
Download the factory service manual, from here
240sx FSM, Full Service Manuals, S13, S14, KA24E, KA24DE - Nissan Forum | Nissan Forums
Get your FSMs' HERE!
Hey whats up everyone. I noticed a lot of people are asking a lot of the same questions without searching or first looking at a factory service manual. There are also people that have answered questions that are wrong, according to the FSM. The FSM contains everything you need to know about the...
To be better at keeping the car running well, I suggest this route.
Get yourself a consult cable. They are really freaking cheap. These are your link to what the car is doing. It's kind of like an obd2 port but since the car is older than 1996, it's a Nissan specific connector known as the consult port. It should be located right near your fusebox in the driver or passenger side footwell.
Consult cable:
14 Pin For Nissan Consult Interface USB Car Diagnostic OBD Fault Code Cable Tool | eBay
Find many great new & used options and get the best deals for 14 Pin For Nissan Consult Interface USB Car Diagnostic OBD Fault Code Cable Tool at the best online prices at eBay! Free shipping for many products!
www.ebay.com
Doesnt have to be that one. But you want it for a Nissan.
PLMS Developments - Consult Cables
PLMS Developments
www.plmsdevelopments.com
OBD1 Consult Cable
I have a 1991 240sx Hatch I was looking at ways to get live data and to adjust small things like the IACV and see the timing in live data. The Nissan dealership has an awesome consult pad/computer thing and I noticed they used a cable similar to OBD2 plugs. I did some research and came up with...
Ebay has these for really cheap. I'm talking like $20.
Then you need a laptop or a tablet that can run some software. I've used ECUtalk with some success in the past. It's free and it lets you read codes and see the sensor readings.
ECUTalk - Consult Software
ECUTalk - Home of projects targeting the NISSAN Consult diagnostic protocol
www.ecutalk.com.au
So once you get your cable, software, and laptop all set up, you can just plug in and see if any codes pop up. Check these codes against what the FSM has.
You can also see the voltages for each sensor. You can sit in your driveway and just look at what the car is doing. You can make them all look like dial gauges so if something is pegged at one value or is erratic, you can see it visually.
You can also let someone else drive it around while you monitor and see what's happening.
Hope you get it figured out. Don't be like me and throw a crap load of parts at it.
Definitely gonna look into this for the summer, thank you 🙏A lot of those views are probably bots too.
I had a similar stuttering issue.
I could be driving and then out of nowhere, it would buck and lose all power.
Eventually it would just shut off the engine and would not restart.
Think rolling anti-lag and then it just dies.
What I did was get a Z32 fuel filter, oem spec fuel pump, knock sensor, and MAF.
Everything was good after that, but it still has trouble starting ( from sitting overnight) so I'm thinking ignition switch.
What I recommend for you is to get a consult port adapter.
This way you can see what the hell all the sensors are doing and pinpoint it better.
Hold on, let me go find it.
You can do this a few ways. If you are really strapped for cash, then there is a way to read the codes from the actual ecu using the blinking light method.
![www.240sxforums.com]()
Just Codes v1.1
Yes I know there was an "Just Codes thread but I felt it was a little to General in the "Codes" it Covered so.. For this Thread instead of Just Chassis Codes and Engine Codes, it Will be More Organized and Include Diagnotic Trouble Code's as well A.K.A. OBD Codes (OBD-I & II share the same...
www.240sxforums.com![www.240sxforums.com]()
You can download the factory service manual which is free and see what you need to do.
Download the factory service manual, from here
![forums.nicoclub.com]()
240sx FSM, Full Service Manuals, S13, S14, KA24E, KA24DE - Nissan Forum | Nissan Forums
forums.nicoclub.com![forums.nicoclub.com]()
![www.240sxforums.com]()
Get your FSMs' HERE!
Hey whats up everyone. I noticed a lot of people are asking a lot of the same questions without searching or first looking at a factory service manual. There are also people that have answered questions that are wrong, according to the FSM. The FSM contains everything you need to know about the...
www.240sxforums.com![www.240sxforums.com]()
To be better at keeping the car running well, I suggest this route.
Get yourself a consult cable. They are really freaking cheap. These are your link to what the car is doing. It's kind of like an obd2 port but since the car is older than 1996, it's a Nissan specific connector known as the consult port. It should be located right near your fusebox in the driver or passenger side footwell.
Consult cable:
![www.ebay.com]()
14 Pin For Nissan Consult Interface USB Car Diagnostic OBD Fault Code Cable Tool | eBay
Find many great new & used options and get the best deals for 14 Pin For Nissan Consult Interface USB Car Diagnostic OBD Fault Code Cable Tool at the best online prices at eBay! Free shipping for many products!
www.ebay.com
Doesnt have to be that one. But you want it for a Nissan.
PLMS Developments - Consult Cables
PLMS Developments
www.plmsdevelopments.com
![www.240sxforums.com]()
OBD1 Consult Cable
I have a 1991 240sx Hatch I was looking at ways to get live data and to adjust small things like the IACV and see the timing in live data. The Nissan dealership has an awesome consult pad/computer thing and I noticed they used a cable similar to OBD2 plugs. I did some research and came up with...
www.240sxforums.com![www.240sxforums.com]()
Ebay has these for really cheap. I'm talking like $20.
Then you need a laptop or a tablet that can run some software. I've used ECUtalk with some success in the past. It's free and it lets you read codes and see the sensor readings.
ECUTalk - Consult Software
ECUTalk - Home of projects targeting the NISSAN Consult diagnostic protocol
www.ecutalk.com.au
So once you get your cable, software, and laptop all set up, you can just plug in and see if any codes pop up. Check these codes against what the FSM has.
You can also see the voltages for each sensor. You can sit in your driveway and just look at what the car is doing. You can make them all look like dial gauges so if something is pegged at one value or is erratic, you can see it visually.
You can also let someone else drive it around while you monitor and see what's happening.
Hope you get it figured out. Don't be like me and throw a crap load of parts at it.
I actually looked at your video and mine was doing the same thing at times.
That weird hesitation was right at like 2800 rpm.
Idid change the MAF, but it could also be the wiring for it.
If it's rubbed somewhere and shorting itself it won't matter how many MAFs you throw at it.
I'm also seeing a comment somewhere for the CAS (Crank angle sensor or Cam angle) and I recall cleaning that connector.
Literally just used some CRC electronics contact cleaner ( DO NOT USE ELECTRICAL DEGREASER THAT WILL MELT PLASTIC)
Like I disconnected it and sprayed it.
Another thing to consider is that since the cars are this old, you need to pay more attention to grounding & other electrical issues.
We are talking 25-35 year old cars, so that's a lot of time for things to corrode/rust/oxidize.
Leaks are another issue.
I see that the CAS is on the S13 engine block.
What could be happening is that you might have an oil leak from your valve cover or even your headgasket.
As it trickles down the side of your engine, that oil/coolant could be shorting the connector.
So even if you have a good working sensor and some good wiring, that leak is messing with the sensor output that's going to your engine.
You might read the FSM flowchart and be like "Damn I put a new sensor, rewired the entire thing, put in another working ECU and it's still doing it?! F*** Nissans"
On my stock S14, I remember getting flashed with the oil pressure idiot light.
I actually stopped driving that car because I was like "oh no, bad oil pump, engine might need a rebuild"
My ka still has the timing chain guides on it since I never removed it.
I also had another starting issue with it but the oil light really scared me.
Recently I talked to my 240 buddy/ mechanic and he asked if my engine block was pristine or if I had a valve cover leak.
When I told him about the valve cover leak he said it's probably just oil and I should just clean that entire area up.
He said to do that first.
The fsm has a flowchart but I don't think it accounts for EVERY single thing that could go wrong or affect the car.
Don't give up, keep at it. Let us know what you find
Here are some other threads that might help if you haven't already seen them.
www.240sxforums.com
forums.nicoclub.com
You can also search for 240sx bog at 2800 or 3000 rpm
That weird hesitation was right at like 2800 rpm.
Idid change the MAF, but it could also be the wiring for it.
If it's rubbed somewhere and shorting itself it won't matter how many MAFs you throw at it.
I'm also seeing a comment somewhere for the CAS (Crank angle sensor or Cam angle) and I recall cleaning that connector.
Literally just used some CRC electronics contact cleaner ( DO NOT USE ELECTRICAL DEGREASER THAT WILL MELT PLASTIC)
Like I disconnected it and sprayed it.
Another thing to consider is that since the cars are this old, you need to pay more attention to grounding & other electrical issues.
We are talking 25-35 year old cars, so that's a lot of time for things to corrode/rust/oxidize.
Leaks are another issue.
I see that the CAS is on the S13 engine block.
What could be happening is that you might have an oil leak from your valve cover or even your headgasket.
As it trickles down the side of your engine, that oil/coolant could be shorting the connector.
So even if you have a good working sensor and some good wiring, that leak is messing with the sensor output that's going to your engine.
You might read the FSM flowchart and be like "Damn I put a new sensor, rewired the entire thing, put in another working ECU and it's still doing it?! F*** Nissans"
On my stock S14, I remember getting flashed with the oil pressure idiot light.
I actually stopped driving that car because I was like "oh no, bad oil pump, engine might need a rebuild"
My ka still has the timing chain guides on it since I never removed it.
I also had another starting issue with it but the oil light really scared me.
Recently I talked to my 240 buddy/ mechanic and he asked if my engine block was pristine or if I had a valve cover leak.
When I told him about the valve cover leak he said it's probably just oil and I should just clean that entire area up.
He said to do that first.
The fsm has a flowchart but I don't think it accounts for EVERY single thing that could go wrong or affect the car.
Don't give up, keep at it. Let us know what you find
Here are some other threads that might help if you haven't already seen them.
Bogging issues? Hesitation? Look here.
There seems to be a large number of threads including one from me concerning this issue. I know I am not a huge contributor to this forum. But instead being of pissed of at every person starting a thread on this and guessing an answer at them, I will write a complete checklist and diagnosis for...
www.240sxforums.com
Crank sensor on s13 and s14. - Nissan Forum | Nissan Forums
forums.nicoclub.com
You can also search for 240sx bog at 2800 or 3000 rpm
1 - 6 of 6 Posts
