SPONSORED LINKS

1990 Chevy Truck Engine misses at idle, sporatic

Tiny
GLASSMASTER
  • MEMBER
  • 1990 CHEVROLET TRUCK
  • V8
  • 2WD
  • AUTOMATIC
  • 25,000 MILES
It's erratic. Misses at idle. Also a little hesitation at first acceleration. Sometimes when its first started, when I put it in gear, it will shut off. No code shows. I'e changed out: spark plugs, O2 sensor, TPS, PCV valve, Idle air control valve, fuel filter, changed out 1/4m inch vacuum hose, EGR valve checked, not sticking. I'm stuck. Thanks
SPONSORED LINKS
Friday, August 27th, 2010 AT 6:02 PM

5 Replies

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Check the engine compression if okay-check and test the MAP sensor and also the fuel pressure-You sure its not bad fuel?
Was this
answer
helpful?
Yes
No
-1
Friday, August 27th, 2010 AT 6:17 PM
Tiny
GLASSMASTER
  • MEMBER
  • 3 POSTS
Disappointed. None of your suggestions helped. I replaced distributor and wires and cleaned coil. The hesitation is gone. You didn't even mention that in your suggestions. Next time I wont donate for a reply, I'll just wait till you get around to answering.
SPONSORED LINKS
Was this
answer
helpful?
Yes
No
-2
Sunday, August 29th, 2010 AT 8:17 AM
Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
I gave you something to work with I'm not done with you. Do you have a check engine light? Also check the fuel pressure with a fuel pressure tester and give me the readings I need to know this and Clean out the EGR/PCV valves and look for vacuum leaks then report back with your results
Was this
answer
helpful?
Yes
No
Sunday, August 29th, 2010 AT 4:57 PM
Tiny
GLASSMASTER
  • MEMBER
  • 3 POSTS
That's ok. Everything mentioned was cleaned/changed out. The new distributor and plug wires did the trick. Truck runs fine. Thanks
Was this
answer
helpful?
Yes
No
Monday, August 30th, 2010 AT 10:14 AM
Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Your welcome and thanks for coming back with the fix this way others will benefit from it-
SPONSORED LINKS
Was this
answer
helpful?
Yes
No
+1
Monday, August 30th, 2010 AT 5:49 PM

Please login or register to post a reply.

Related Engine Misfire Content

Intermittent Misfire
VIDEO
Intermittent Misfire
Instructional repair video
Misfire Random Code P0300
GUIDE
Misfire Random Code P0300
The world of automotive diagnostics can be complex, with numerous codes and potential issues to keep track of. One of the more common engine diagnostic codes is P0300, which...
VIEW MORE

Sponsored links