1990 talon tsi backfire issues help posting data logger info?

The car backfires deal bad at top boost 14psi. And if the a/c is on its worse I borrowed a data logger from a friend but don't k ow how to post or even make sure I'm logging correctly. Any help would be great thanks

 

[ktmrider]

Why the second post?!?

 

No responses on the first post and there was a lot of stuff that was fixed already. Story if I have offended any one

 

[EHmotorsports]

It's been barely a day and you should have just bumped the origanal post.

 

OK I messed up just needing help I guess a scolding is in order thank you ...but still no help posted.

 

bump still need help how to post my data logger results in a readable format thank you

 

update .. customer does not back fire at all when not fully warmed up. after it is warmed up all the way it starts to missfire a little bit and back fires at 3rd gear and up anything past 10psi

 

[ktmrider]

^^ That suggests that when the car is in Closed Loop, ie operating temperature and using signal from O2, it's seeing some odd values and trying to compensate.

Open Loop, or cold temps, use simulated data from the ECU map.

Dig a bit into what 1g cars use sensor-wise for OL and CL, that should help point you in a better direction for troubleshooting.

 

thank you ... im sure the data logger info i have will help sort this out

 

Update : issues all resolved. Completed a mini service ... changed 02 sensor, spark plugs with NGK 7bes gaped at 31 , ngk plugs, new coil pack , fuel filter, and injector o rings... now idles great with and without a/c. No more back fire issues etc pulls at 14psi to 6500 no problem thank you to all took the time to help me /ubbthreads/images/graemlins/rofl.gif