Redtop SR ECU questions

bchslap · Dec 29, 2006

So I was skimming through Wolf's ECU info page.. And decided to see what my SR20DET/ECU came from..

Well, It's not in the list.. I've doublechecked the ECU numbers, but something isn't right... Whats on the ecu:
Big stamped "63"
Little red tag on the plug edge:
G91
Square red NISSAN tag on the cover:
A11-000-G91 2X19
23710-50F10

Then I found this info:

rs13 jan'91 ~ jan'94 sr20det, automatic
s13 jan'91 ~ oct'93 sr20det, automatic
Think this may be why I am also having the throttle tip-in hesitation, beings I have a manual trans? Is there a power/mapping difference between manual/auto trans ecu's?

I know that on, say, the Z32tt, the manuals put out 300hp, and the autos put out 280, so is that the same with the S13 SR ecu's? Am I not getting all the power I should be?

rexbo · Dec 30, 2006

yes, the auto ecu will cause problems if you try to use it with a manual harness. Get a #62 ecu from a manual redtop and you should be ok

bchslap · Dec 30, 2006

Thanks, rexbo

great.... how hard are they to come by, and usual pricing?

bchslap · Dec 30, 2006

Ok, the only issue I'm really having is this 'hesitation' or 'hiccup' on throttle tip-in, if you're barely touching the throttle, and when cruising 2nd or 3rd gear, and lightly touching the throttle on/off "closed" position.. Otherwise, so far, I've got no other issues with the runability so far.

bchslap · Jan 1, 2007

Alrighty, then.. fixed the hesitation.. I "suspected" a TPS issue, so I wired up a consult port. Plugged in with Nissan Data Scan and checked codes: viola! TPS out of range..
clicked over on gauges and looked at the TPS voltage at off-throttle and WOT.. 0v and 3.5v respectively..

Adjusted TPS and BAM! Hesitation gone. Full-richness (O2 sensor was 100% ) gone!

Only code I get now, is no signal from auto trans (duh)..

Redtop SR ECU questions

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