running rich

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06-01-2006, 07:11 PM

LondonGT

Thread Starter

Join Date: May 2006

Posts: 46

running rich

I've just got my first stang, 90 gt, with mac headers and exhuast,

it seems to be running rich both from e-test and smell. what is likely to cause this?

06-01-2006, 07:33 PM

5.0stanger

6th Gear Member

Join Date: Feb 2006

Location: Howard City, MI

Posts: 5,956

RE: running rich

Do you have catalitic converters?

06-01-2006, 07:34 PM

88BlueGT

6th Gear Member

Join Date: Sep 2005

Location: Hamilton, NJ

Posts: 15,042

RE: running rich

^^^ +1 If its an O/R H pipe you will smell that...

06-01-2006, 07:46 PM

nitrous_bob

6th Gear Member

Join Date: Oct 2005

Location: st clair shores MI

Posts: 6,028

RE: running rich

O/R h-pipe, bad o2 sensors, too much fuel pump, inj, or fuel press.

06-01-2006, 07:49 PM

lookinforastang

I ♥ Acer

Join Date: Feb 2006

Location:

Posts: 2,039

RE: running rich

could be an exhaust leak

06-01-2006, 09:52 PM

Joel5.0

5th Gear Member

Join Date: Jan 2006

Location: Puerto Rico

Posts: 3,926

RE: running rich

Fuel pressure too high
Bad FPR. allowing fuel to get through the vacuum line
Bad PCV
Coolant Sensor (ECT)
Air Charge sensor (ACT/IAT)
O2 Sensors
Faulty/contaminated MAF
Engine oil contaminated (fumes recirculated through PCV system)
ECM
Bad grounds
EGR valve
Low timing setting
Canister Purge solenoid (CANP)
Injectors
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Suggest to run a set of DIY KOEO/KOER self-test and a fuel pressure check to start removing possible causes from the list....My 2Â¢.