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My compression is good fuel pressure is good new.

Tiny
BRENT.JACKSON
  • MEMBER
  • 1995 CHEVROLET LUMINA
  • 175,000 MILES
My compression is good fuel pressure is good new plugs wires I replaced coil packs everything is showing good fire but when I take three of the wires off its not makin a difference in the sound of the engine where do I go next
Saturday, December 1st, 2012 AT 9:15 PM

4 Replies

Tiny
JDL
  • MECHANIC
  • 16,098 POSTS
Are there any driveability issues? If not, why look for trouble? If you have three dead cylinders, which cylinders? Did you visually check for spark at those cylinders? Did you check for injector pulse?
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Saturday, December 1st, 2012 AT 9:37 PM
Tiny
BRENT.JACKSON
  • MEMBER
  • 3 POSTS
Yes it don't have any power can't get through a big dip in the driveway without a runnin start and I checked the plugs and wires they are firing just don't seem like the engine is takin it and my injectors are good also nothin shows on cp when I test
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Saturday, December 1st, 2012 AT 9:55 PM
Tiny
BRENT.JACKSON
  • MEMBER
  • 3 POSTS
1, 3, and 5 are firing engine just not takin it I don't know how else to say it firing not firing whatever
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Saturday, December 1st, 2012 AT 9:59 PM
Tiny
JDL
  • MECHANIC
  • 16,098 POSTS
Check the spark plugs on those cylinders after cranking, are they dry, are they wet? If they are dry, I'd have to check injector pulse. Did you use a spark tester on those spark plugs, you can open the gap on the tester, to see if spark will jump the gap, if not, it is a weak spark. You may need to check cylinder compression?
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Saturday, December 1st, 2012 AT 10:10 PM

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