Check engine light, sluggish
#1
Check engine light, sluggish
2000 Silverado, 4.3L, auto
Intermittent check engine light illumination. When the light is illuminated, the engine runs very rough & is sluggish. Recently replaced the spark plugs with OEM, also replaced wires, cam position sensor, air & fuel filters. Fuel mileage has never been good but when this problem started gas mileage has become very bad. 8-10 miles a gallon. Light will not stay on long enough to get it to a repair facility.
HELP
Intermittent check engine light illumination. When the light is illuminated, the engine runs very rough & is sluggish. Recently replaced the spark plugs with OEM, also replaced wires, cam position sensor, air & fuel filters. Fuel mileage has never been good but when this problem started gas mileage has become very bad. 8-10 miles a gallon. Light will not stay on long enough to get it to a repair facility.
HELP
#3
When I had those symptoms, I replaced the distributor cap and it fixed it.
I have a '97 5.7, so I'm not sure if your (newer) 4.3 has a mechanical distributor or not. Please disregard this if not.
I have a '97 5.7, so I'm not sure if your (newer) 4.3 has a mechanical distributor or not. Please disregard this if not.
#5
New distributor cap was installed along with plugs & wires.
The code is 303 I think. "multiple intermittent cylinder misfires" is the code that is displayed. I have been told that Platnium plugs sometimes cause this code. I'm changing the plugs to standard or copper to see if that will correct the problem. Any & all ideas/comments appreciated.
The code is 303 I think. "multiple intermittent cylinder misfires" is the code that is displayed. I have been told that Platnium plugs sometimes cause this code. I'm changing the plugs to standard or copper to see if that will correct the problem. Any & all ideas/comments appreciated.
#7
Changed the plugs yesterday (again). Ran good for about 10 miles, then started missing again. No light yet. Plugs that were removed were fouled badly. They had about 6,000 miles on them.
Trending Topics
#8
check engine light...sluggish, bad miss
Thanks to all of you that responded to my problem.
FOR THE RECORD...PROBLEM SOLVED.
replaced the gear assembly on the distributor which was badly worn allowing timing to vary by as much as 10-12 degrees. Chevrolet dealer in Columbia, TN
was able to determine the problem thanks to the shop mgr. (30 years with GM)
He diagnosed the problem almost immediately. Very impressive
FOR THE RECORD...PROBLEM SOLVED.
replaced the gear assembly on the distributor which was badly worn allowing timing to vary by as much as 10-12 degrees. Chevrolet dealer in Columbia, TN
was able to determine the problem thanks to the shop mgr. (30 years with GM)
He diagnosed the problem almost immediately. Very impressive
#10
Thanks to all of you that responded to my problem.
FOR THE RECORD...PROBLEM SOLVED.
replaced the gear assembly on the distributor which was badly worn allowing timing to vary by as much as 10-12 degrees. Chevrolet dealer in Columbia, TN
was able to determine the problem thanks to the shop mgr. (30 years with GM)
He diagnosed the problem almost immediately. Very impressive
FOR THE RECORD...PROBLEM SOLVED.
replaced the gear assembly on the distributor which was badly worn allowing timing to vary by as much as 10-12 degrees. Chevrolet dealer in Columbia, TN
was able to determine the problem thanks to the shop mgr. (30 years with GM)
He diagnosed the problem almost immediately. Very impressive
Thread
Thread Starter
Forum
Replies
Last Post
juspassinthru
Silverado, Sierra & Fullsize Pick-ups
12
May 7th, 2011 12:27 PM