running rich

[90exaccord]

so i have a 1991 honda accord with a f20a single with a pt3 ecu and the car is running to rich was wondering what can cause this am i using the wrong ecu or what? help please and i change the 02 sensor because it was throwing that code but i still have have the 02 sensor code

[evil_demon_01]

What makes you think it is running rich?

[90exaccord]

wen i rev it black smokes comes out and it smells like gas

[wed3k]

for heater circuit or fuelsystem supply code?

[cloudasc]

The f20a is a destroked f22a. The fact your using a pt3 is probably the problem, as the pt3 is meant to run f22a1 or f22a4. To run your motor properly you'll either need the correct ecu for a f20a, or to get a p06 and have it chipped, and your motor tuned.

[90exaccord]

It is throwing the fuelsytem n isn't the p06 for a d15

[wed3k]

check signal wire at pcm with a voltmeter and see if you have a fluctuating voltage.

[cloudasc]

It is throwing the fuelsytem n isn't the p06 for a d15

p06 is from 92-95 civics if i'm correct. The accord/prelude ecu's are not chipable/tunable. The p06, p28, p72 are all examples of ecu's that are chippable/tunable. If they are chippable/tunable they can be tuned to run almost motor.

[90exaccord]

ok cuz i had a 94 eg and it had a d15b7 n i was using the p06 ecu for that engine but i got rid of it you think i can use the p72

[cloudasc]

A p06 would be the easiest & cheapest ecu to find at a junkyard, and once you aquire one, you can have it chipped/modified to be the equivalent of a p28, or p72, and then tuned.

[90exaccord]

k thanks

[jhondayaaj]

check to make sure your fuel pressure regulator is not leaking. and your injectors.