i have a p91 ecu that is identicle to a p28.

it was chipped by someone and is using a map that was done when the car was dyno tuned.

the ecu loooks to be done right. i mean its not done cleanly but all the diodes are there.

when i plug it in, the car starts up and works fine for 2 seconds... then after 2-5 seconds the engine light comes on and the car only revs for 3800 rpm. i get an injector code when i look up the cel flashes.


the motor is a 99 gsr wired for obd1. is it because of the dual runner intake manifold with the butterflies????

i really cant figure it out.

here is a post with pictures of the ecu and info.

http://lowmotion.org/viewtopic.php?f=25&t=131492

thanks

 

The dueal runner IM has a default for the short runners (high RPM mode). It provides no feedback to the ECU. What code are you receiving?

 

That ecu looks like it was chipped by some one a long time ago.

The dual runners have nothing to do with the issue you are having.
What exact code is the ecu throwing ?

 

the ecu was chipped 4 months ago. i forgot what code it is exactly. i think it was code 14. it was an injector code. ill look it up now

 

Code 14 is an idle air control valve...

 

its code 16 that flashes

 

Try another ecu and get back to us.

 

um i will have to locate another ecu. i mean if the ecu was bad wouldnt it not start at all. the code im getting is fuel injection code. but when i use my stock obd1 gsr ecu the car works fine

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by XLR8_HFX &raquo;</TD></TR><TR><TD CLASS="quote">um i will have to locate another ecu. i mean if the ecu was bad wouldnt it not start at all. the code im getting is fuel injection code. but when i use my stock obd1 gsr ecu the car works fine</TD></TR></TABLE>

There could be a driver in the ecu that is bad.

 

i thought it may be a bad burn. i dont know. it seems that the ecu works. just maybe a driver error as you said. i cant see any diodes burnt or traces burnt