My CEL keeps coming on and off and i jumped the ECu to check the codes:

I threw:

45(too rich/lean)
72\
73 -(cylcinder misfires 2,3,4)
74/

Please I need help asap.

I got a B&M fpr but the thing is, I dont like how you have to bootleg the **** by cutting the stock one. Should I just install the B&M? or sell it and get the AEM fpr?(I just dont wanna regret installing the B&M by wanting the AEM)

I'm guessing im running too lean cuz I got a 99si with i/h/cat/e and it would be logical to guess im getting more air than fuel.

TIA


Modified by Shorty C at 9:26 PM 4/15/2004

 

Also I got NGK spark plugs/wires so my ignition system should be fine.

 

anyone?

 

bump for the night

 

i have had no problems with my B&M. i give them a

 

You need to put your car on a dyno & see how lean or rich you are running.
Check your spark plugs & make sure they are not fouled.
Check for sounds of detination to ensure your motor is not about to go b00m!

Then adjust accordingly to what results you get.

 

I knwo this isnt a complete fix but you might want to just a obd1 conversion an see how it runs i have had obd2 sometimes have a mind of the own but not all. well good luck

 

so do you all think a fpr with more fuel would put it near stoich?

 

as far as the fpr goes im real down with the b&m of course it took me two tries to get the hack right(thank god for parts cars) - but you should already be getting enough fuel sounds like you have an ignition problem
-what might help is a b&m gauge - then at least you would know how much pressure your getting

 

yea i got the gauge and just put it in along with the fpr

The stock setting idled at 35-36psi and revved to 40ish

I set it at 54psi is this too high for my setup?

If so, whats a good setting for my setup? i/h/cat/e

 

i put it back to 44psi

maybe 42 is ideal?

anyone please help!

i know there's no way to know whats "ideal" by just turning the screw. But i have no money for a dyno run and i dont know many dyno places around my area

 

you should be around 39-46 with the vacuum hose connected to the fpr - so your probably good where you are

 

Ok, i put in the b&m gauge and fpr and set it at 42psi -- fixed the code 45 problem.

Then i jumped the ECU again now im throwing 71,72,73,74

I checked all my spark plugs and they all look fine to me. Not too black, not too white.

I pulled out each plug wire while the car was idling and everyone of them bogged out the motor which means the wires should be in working order too.

So now im clueless of why im throwing 71-74(cyclinder 1-4 misfires)

Could it be a bad o2 sensor?


Im gonna reset my ecu one more time and see if I still throw the codes.

Any help is much appreciated.