Running WAY too rich, how to correct?

J

jas142

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Feb 11, 2002

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Apr 19, 2004

#1

• Apr 19, 2004

• #1

I have an o/r UPR X pipe and K&N on my 04 Mustang GT Automagic. I replaced the rear o2 sensors when I put them on (we damaged them taking off the old X pipe) and the Mil Eliminators are in and working (no CEL)

But the car runs VERY rich, and I'm getting very bad gas mileage. How could I lean this out and correct it to run a better ratio and hopefully improve my gas mileage? Would a Diablo Chip help?

 

DBMSTNG

I fantasize about it being BIG!

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Apr 23, 2002

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Apr 19, 2004

#2

• Apr 19, 2004

• #2

you could get the car reprogrammed, or just give the ECU some time to adjust.

 

J

jas142

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Feb 11, 2002

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Apr 19, 2004

#3

• Apr 19, 2004

• #3

I've had the X pipe on for about a month now, and I tried resetting ECU as well. Didn't fix the problem.

I'm afraid to take it to the dealership to get it reflashed because then they'll know I modified the car and void my warranty.

 

mrvax

Stay thirsty my friends

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Nov 29, 1999

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Apr 19, 2004

#4

• Apr 19, 2004

• #4

You can remove the EEC and send it with dyno runs to Tim at T&J Performance. Contact "Cobra Killer". Or, you can get a custom chip and dyno tune which will cost about 2x as much.

 

PDubs

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Feb 15, 2002

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Apr 19, 2004

#5

• Apr 19, 2004

• #5

Dealerships generally do not work on cars with o/r pipes. You could get a tuning module or get some mods to flow more air in there.