1987 Chevy Astro Engine loses power and misses

1987 CHEVROLET ASTRO
160,000 MILES • 4 CYL • 2WD • AUTOMATIC
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TERRY P
  • MEMBER
  • 13 POSTS
After driving and engine warms up I am losing power and it misses i have checked for codes I have a 13 42 44 plugs cap rotor and 02 sensor have been replaced bumper was black like it was running rich im wondering were too go next
Apr 26, 2010 at 4:11 AM
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RASMATAZ
  • ✓Experienced Mechanic
  • 75,988 POSTS
Hi Terry P, Welcome to 2carpros and TY for the donation

Check and test below

Running rich:

1.Fuel pressure not within specs.Can be cause by restricted fuel return line or defective fuel pressure regulator.
2.Leaking injectors.
3.Coolant temperature sensor out of calibration.
4.Restricted air intake system.
Apr 26, 2010 at 8:11 AM
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