Ok, so I just fixed the massive vacuum leak on my DE and got it running, kind of. With everything hooked up like it is supposed to be, I can start the engine which will run great for about 5 seconds. After that is starts to bog down, and eventually dies instantly as if spark was shut off.
So, I did some testing today and discovered that with the MAF unplugged, sending the ECU into limp mode, it will sit and idle all day long, even rev up to 1500 with no problem. Of course it's running pig rich, but it's smooth at least and it doesn't die! If I plug the MAF back in while it's idling it will start sputtering and die. If I plug it in while revving the engine up, it will cancel out the rev limiter and go above 1500, but dies after 5 seconds as if the spark was just shut off.
Before I get too much farther I'd like to point out that I have done the complete evap and EGR removal, so the only things that are plugged in to the harness in any way is the MAF sensor, ECT sensor, TPS, knock sensor, and the IACV. Now, I have tried every combination of these sensors being plugged/unplugged, with the MAF unplugged and the engine running. Disconnecting the TPS causes the engine to surge massively and nearly die. Disconnecting the IACV causes the idle to drop, but it stays relatively smooth. Disconnecting the ECT sensor causes a quick dip in RPM, but it evens out quickly. And disconnecting the knock sensor does nothing.
SO, the plot thickens against the MAF. I checked the voltages with and without the car running, 12V was good, ground was good. Would I be correct to assume the MAF is the only logical part that can be causing these issues?
So, I did some testing today and discovered that with the MAF unplugged, sending the ECU into limp mode, it will sit and idle all day long, even rev up to 1500 with no problem. Of course it's running pig rich, but it's smooth at least and it doesn't die! If I plug the MAF back in while it's idling it will start sputtering and die. If I plug it in while revving the engine up, it will cancel out the rev limiter and go above 1500, but dies after 5 seconds as if the spark was just shut off.
Before I get too much farther I'd like to point out that I have done the complete evap and EGR removal, so the only things that are plugged in to the harness in any way is the MAF sensor, ECT sensor, TPS, knock sensor, and the IACV. Now, I have tried every combination of these sensors being plugged/unplugged, with the MAF unplugged and the engine running. Disconnecting the TPS causes the engine to surge massively and nearly die. Disconnecting the IACV causes the idle to drop, but it stays relatively smooth. Disconnecting the ECT sensor causes a quick dip in RPM, but it evens out quickly. And disconnecting the knock sensor does nothing.
SO, the plot thickens against the MAF. I checked the voltages with and without the car running, 12V was good, ground was good. Would I be correct to assume the MAF is the only logical part that can be causing these issues?
