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Joined: Sep 2012
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Hi i have a 2000 zr2 blazer when i first start it it runs ruff at low speeds at full throtel it runs fine.and when it warms up it clears up i have put a used egr valve,crankshaft sensor and disribitor still run ruff at light throtel. rjhvetter@yahoo.com
Last edited by rjhvetter; Sep 3, 2012 at 05:57 PM. Reason: leave email address
BF Veteran
Joined: Sep 2008
Posts: 2,522
From: Winnipeg, Manitoba
Why the email addy? You're not going to check back & would rather we email you?
Anyway... search around here, there have been more than a few recent posts about rough starting, low performance when cold & better when the engine warms up. I just can't remember them off hand.
Try searching for rough cold start, bad idle etc.. change up wording, sit back & read a lot because I know the answer is there.
1st thoughts would be O2 sensor/s, cat, TPS, EGR - Not used but clean & replace the gasket), MAF, AC Delco electrical parts IE: dist, CKP (crankshaft position sensor) usually doesn't go out unless it gets hit by the crankshaft & that = bigger issues like bearings. You can see if it's been impacted by the witness marks on the face of it when you remove it.
Anyway... search around here, there have been more than a few recent posts about rough starting, low performance when cold & better when the engine warms up. I just can't remember them off hand.
Try searching for rough cold start, bad idle etc.. change up wording, sit back & read a lot because I know the answer is there.
1st thoughts would be O2 sensor/s, cat, TPS, EGR - Not used but clean & replace the gasket), MAF, AC Delco electrical parts IE: dist, CKP (crankshaft position sensor) usually doesn't go out unless it gets hit by the crankshaft & that = bigger issues like bearings. You can see if it's been impacted by the witness marks on the face of it when you remove it.
Thread Starter
|
New Member
Joined: Sep 2012
Posts: 2
Why the email addy? You're not going to check back & would rather we email you?
Anyway... search around here, there have been more than a few recent posts about rough starting, low performance when cold & better when the engine warms up. I just can't remember them off hand.
Try searching for rough cold start, bad idle etc.. change up wording, sit back & read a lot because I know the answer is there.
1st thoughts would be O2 sensor/s, cat, TPS, EGR - Not used but clean & replace the gasket), MAF, AC Delco electrical parts IE: dist, CKP (crankshaft position sensor) usually doesn't go out unless it gets hit by the crankshaft & that = bigger issues like bearings. You can see if it's been impacted by the witness marks on the face of it when you remove it.
Anyway... search around here, there have been more than a few recent posts about rough starting, low performance when cold & better when the engine warms up. I just can't remember them off hand.
Try searching for rough cold start, bad idle etc.. change up wording, sit back & read a lot because I know the answer is there.
1st thoughts would be O2 sensor/s, cat, TPS, EGR - Not used but clean & replace the gasket), MAF, AC Delco electrical parts IE: dist, CKP (crankshaft position sensor) usually doesn't go out unless it gets hit by the crankshaft & that = bigger issues like bearings. You can see if it's been impacted by the witness marks on the face of it when you remove it.