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1996 Ford Probe Engine missfire

Tiny
CHASEHILL
  • MEMBER
  • 1996 FORD PROBE
  • 2.5L
  • V6
  • FWD
  • MANUAL
  • 135,000 MILES
The car has very low power and when you accelerate it backfires into the intake. I have replace the distributor and timed it to ten degrees btdc. I have checked the camshaft timing and it is correct. If I restrict the air flow to the intake the engine smooths out and starts to run better. Could it possibly be a failed egr valve or a failed VAF feeding the ecm false data. I have also replaced the crankshaft position sensor
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Monday, November 24th, 2014 AT 8:11 PM

4 Replies

Tiny
JOHNNYT73
  • MECHANIC
  • 924 POSTS
I would check out your mass air flow sensor, and spray around with throttle body cleaner for vacuum leaks.
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Tuesday, November 25th, 2014 AT 4:58 AM
Tiny
JOHNNYT73
  • MECHANIC
  • 924 POSTS
Also have it checked for a clogged converter.
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Tuesday, November 25th, 2014 AT 4:58 AM
Tiny
CHASEHILL
  • MEMBER
  • 2 POSTS
The converter has just been replaced
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Tuesday, November 25th, 2014 AT 8:06 AM
Tiny
JOHNNYT73
  • MECHANIC
  • 924 POSTS
Thats good. If you have a scan tool that can read live data. I would look at the MAF sensor, O2 sensor readings, and look at all your temp sensor readings (ECT, IAT, ambient air temp).
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Tuesday, November 25th, 2014 AT 8:55 AM

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