1995 940 Turbo won't accelerate beyond 30
#1
1995 940 Turbo won't accelerate beyond 30
1995 940 Turbo that hasn't been run in a few years. Car starts and idles with no issue. Engine revs in park to high rpm without issue. Put the car in gear and once you accelerate to about 25-30 mph the car bogs down and starts to spew out black smoke.
History of what I have done:
1) Engine code orginally showed mass air flow unit bad. Replaced that, no codes, same problem persists.
2) Thought about plugged catalytic converter. Pulled it off the car and tried to run around the block. Now have same issue as well as a loud sounding car. I assume that means the catalytic converter is not the issue.
I am now at a loss of what to check next. Any thoughts?
History of what I have done:
1) Engine code orginally showed mass air flow unit bad. Replaced that, no codes, same problem persists.
2) Thought about plugged catalytic converter. Pulled it off the car and tried to run around the block. Now have same issue as well as a loud sounding car. I assume that means the catalytic converter is not the issue.
I am now at a loss of what to check next. Any thoughts?
#2
RE: 1995 940 Turbo won't accelerate beyond 30
Possibly a bad fuel pressure regulator. Check fuel pressure, it should be 30-35 psi. If the regulator is bad it will be well over 75 psi.
When you replaced the mass airflow sensor, did you pull the fuse for the enine module? (to reset the engine module settings) Try pulling fuse #1 I think, behind the ashtry, it's for the engine module.
3B
When you replaced the mass airflow sensor, did you pull the fuse for the enine module? (to reset the engine module settings) Try pulling fuse #1 I think, behind the ashtry, it's for the engine module.
3B
#4
RE: 1995 940 Turbo won't accelerate beyond 30
It does! Except you have to deal with the clock and rario codes.
Pull the vacuum hose of the fuel pressure regulator (FPR) and see if fuel is present. If so, replace the FPR. The FPR can still be bad if there is no fuel, but you need a fuel pressure gauge to know for sure.
Also, the main pump can be very noisy if the FPR is bad.
Is the new MAF the exact same part # as the old one?
3B
Pull the vacuum hose of the fuel pressure regulator (FPR) and see if fuel is present. If so, replace the FPR. The FPR can still be bad if there is no fuel, but you need a fuel pressure gauge to know for sure.
Also, the main pump can be very noisy if the FPR is bad.
Is the new MAF the exact same part # as the old one?
3B
#6
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xingchow
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06-11-2013 08:10 AM