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214 Posts
I have a 94 900se 2.5 injected that is running rough. I have tried everything I can think of to fix this and am almost certain it is an air problem. Here is what I have done:
New plugs. wires, fuel pressure regulator, fuel filter, hoses, cleaned fuel injectors on the car, changed trans fluid, changed coolant, cleaned throttle body and IAC Valve, seafoamed 3 times (no carbon/smoke by the way). I have not performed a compression test yet, the plugs a re carbon fouled which leads me to believe it is burning rich and it is a vacuum issue.
Could it be the o2 sensor? what about the 2 sensors in the air intake tunnel leading to the throttle body? I am really stressed about this. The car has not run right since I bought it 5 months ago and is no fun to drive. Does the car have a modulator valve for the trans that could be bad? I am only getting 9 miles a gallon but my display says 14. 170 miles on an 18 gallon tank does not add up.
Pulling my hair out.:evil:
New plugs. wires, fuel pressure regulator, fuel filter, hoses, cleaned fuel injectors on the car, changed trans fluid, changed coolant, cleaned throttle body and IAC Valve, seafoamed 3 times (no carbon/smoke by the way). I have not performed a compression test yet, the plugs a re carbon fouled which leads me to believe it is burning rich and it is a vacuum issue.
Could it be the o2 sensor? what about the 2 sensors in the air intake tunnel leading to the throttle body? I am really stressed about this. The car has not run right since I bought it 5 months ago and is no fun to drive. Does the car have a modulator valve for the trans that could be bad? I am only getting 9 miles a gallon but my display says 14. 170 miles on an 18 gallon tank does not add up.
Pulling my hair out.:evil: