what is wrong with my car? what do i need to replace to make it run better?

1992 FORD CUSTOM
19,600 MILES
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DIANEWING
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  • 2 POSTS
my car back fires when cold it also is slow to gain speed, and when spead increases it looses power
Mar 23, 2012 at 12:26 AM
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RASMATAZ
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Does it have a check engine light and when was last tune-up??

Sounds like lean misfire-check the fuel pressure if its within specs-start here and also go to this link: https://www.2carpros.com/articles/engine-backfires-while-running and https://www.2carpros.com/articles/engine-misfires-or-runs-rough
Mar 23, 2012 at 12:34 AM
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DIANEWING
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it just had a tune up, the check engine lite comes on only when the problem happens then goes away. we know it is running lean but dont know what to fix to stop it from runnung lean
Mar 23, 2012 at 12:40 AM
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RASMATAZ
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Lean fuel condition could be caused by one of the following below:

1.Vacuum leaks

2.EGR and PCV valve.

3.Low fuel pressure.

4.Dirty fuel injectors.

5.Mass Air Flow Sensor.

6.Oxygen Sensor.
Mar 23, 2012 at 4:28 AM