Why is my 2.8 liter engine in my 1993 GMC Sonoma running so rich that it fouls the plugs?

Question:
I have replaced the computer, oxygen sensor twice, Map sensor. Rebuilt the Throttle Body. Had the injectors cleaned and flow checked. I cant drive the truck. It cranks fine but when driving it has no power and will foul the plugs out after about five miles of driving. I also am getting a trouble code for a Mass Airflow Sensor. but there is not one on that year model. Can anyone help me?

Answers:

I need directions for mounting a rear air-deflecter for a 04' Jeep Liberty.?

make sure there are no vacuum leaks! coolant sensor reading too cold will cause this too. clogged exhaust system also cat. convertor clogged. disconnect coolant sensor and try, disconnect throttle position sensor and try also, very black exhaust smoke? look down throttle body as vehicle is running and see if there's too much fuel flow.
putting your hands over throttle body as it's running... it should stall... if it dont there is a large vacuum leak, check the p.c.v. and hoses too.

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How trustworthy is AAMCO? Transmission problem?

you had them flow checked for output but did you have a leakdown check? sounds like you have a very leaky injector or stuck pressure regulator. deff something on the fuel rail is open or leaking. does this truck have the gm spider injectors? they are prone to leak and flood motor. also check your plugs and wires if one or more cyl are dead the motor will run like crap and flood also.

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i have a 4 cyl vw...its making a clicking noise from the engine?

try checking your fuel pressure regulator. i had one blow the diapham and was sucking fuel through the vacuum line.

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Car starting problems - possible starter problem?

sounds like you need to ajust the carberators

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I have a 1991 Suburban. What engine and/or transmission do you suggest to change to get a better MPG?

Replace or remove the catalytic exhaust converter

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automotive questions?

You say you rebuilt the throttle body. Did you take the regulator apart? It sounds like a bad fuel pressure regulator. It is located unter the injector pod. I have seen several get corroded and break causing the same problems you are talking about. Good luck

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Does my 1991 Ford Taurus have a short circuit?

coolant temp sensor

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