how to check fuel trim.

[StockGt03]

I have a system too lean code. N I can't get rid of it. No vacuum leaks, I changed the fuel filter, pcv. It happen after I got a new maf sensor. And it runs like **** when it gets hot and I start the car when its hot. Like a sputtering hesation at idle. Runs normal when I hit the gas.

 

[Sven the Sexman]

Sounds like a defective MAF. Try swapping it out.

 

[SgtMarshal]

try unplugging the maf with the car off and see if it does the same thing, of so, probably a defective maf.

 

[StockGt03]

Its still newer, i got it two monts ago When I unplug the maf. Its sounds like it going to die. Put it run great when its cold.

 

[Sven the Sexman]

Its still newer, i got it two monts ago When I unplug the maf. Its sounds like it going to die. Put it run great when its cold.

New parts are not always good parts. Try swapping it out with one from a known good running car.

 

[StockGt03]

I don't personally know anyone with the same car. Might have to do a warranty swap.

 

[BillBoost37]

These cars seem to be very picky about a maf. They seem to only like OEM maf's. Which means pay a million or hit a salvage yard.

 

[tc300]

These cars seem to be very picky about a maf. They seem to only like OEM maf's. Which means pay a million or hit a salvage yard.

YUUUUUUP!!! Been there done that.....