Hey guys Im just starting to learn how to work on cars and with some help from my uncle (known as Poorman on here) I have learned a great deal but after doing a couple of mods to my car I have found that it is now runing rich. Can anyone with the same or simular setup please send me a tunnercat file?
Thanks
JT

95 Pontiac Firebird Formula
Lt1
373 gears
SLP inatake
Jet-hot headers, X-pipe and 2 dyno max mufflers
180 thermastat
no emisions, egr, or smog pump

 

Is your MAF descreened or portred?

Have any Datamaster logs to share?

Dan

 

The MAS screen is still on and I dont have any datamaster files yet

 

How did you determine it was running rich?

Given what you listed, the most likely problems would be exhaust leaks in the headers, before the O2 sensors, or misfires caused by burned wires.

A 180*F thermostat is stock on the LT1.

 

i mean 160
i think its running rich because when i get out if the car i smell like exhaust and also when i rev up past 4 gran it backfires

 

Sounds like a dirty MAF try unplugging the MAF and see if the reving symptoms go away (the rich issue could be helped by tuning though)

 

i sprayed the MAS with an airhose about a week ago its clean.

 

Thats not the right way to clean your MAF, you should use MAF cleaner, the easiest way to find out if it needs to be cleaned though is to take 10 seconds to unplug it then do some driving.

 

If you unplug the MAF, will the PCM just use a default value for the air flow?

 

If you disconnect the MAF sensor, the PCM will default to speed-density mode, calculating the mass air flow from engine RPM, the volumetric efficiency tables, the inlet air temp and manifold absolute pressure.

Hitting the MAF sensor elements with high pressure air could have damaged them.

 

thanks guys I just got done cleaning the mas and the cars runnning a lot better.