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05-07-2012, 10:25 AM | #1 | |
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1996 Blazer Changed Cap and Rotor - now engine is chugging
I have a 4.3 vortec (W) with the flat dist cap. The aluminum contacts inside the cap were getting white with buildup, so I got a new cap and rotor set (with brass terminals). After install, the engine does not miss, but it has a rough idle and chugs bad on acceleration and SES light is flashing (seems like the timing is off?). I marked the plug wires before removing them, so I know they are not switched.
After installing the new rotor, the mechanical advance seemed to work smoothly...Anyone else had this problem? The only difference I remember between the old and new cap was that the new one came with fine thread screws to secure the cap to the dist - my old one had coarse thread, so I just reused those. Did I buy the wrong Dist cap and rotor set? Thanks! Mike |
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05-07-2012, 07:48 PM | #2 | |
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Re: 1996 Blazer Changed Cap and Rotor - now engine is chugging
I took out my dremel tool with a fine wire brush wheel on it and cleaned up the terminals on the old cap and rotor. I swapped the new set for the old set and now it runs fine.
In looking at the plug wires on the even side, I could not read the numbers I wrote on anymore - so I guess it's possible I switched them when I put the new cap on. Wish I had time to put the new cap back on again to prove it - but I ran out of time and the truck is running good. Sorry to leave you all in suspense with what the problem is - I dunno either. Just glad the truck is running good again! Mike |
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05-08-2012, 10:51 AM | #3 | ||
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Re: 1996 Blazer Changed Cap and Rotor - now engine is chugging
Quote:
No problem there.. If cap does go bad always replace with a AC-delco. They are numbered for plug wires to. If RUNNING GOOD WITH OLD CAP LEAVE IT ON THERE.
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Remember proper testing gives us the answer to many problems. MT |
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The Following User Says Thank You to MT-2500 For This Useful Post: |
mixin (05-08-2012)
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05-08-2012, 11:43 AM | #4 | |
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Re: 1996 Blazer Changed Cap and Rotor - now engine is chugging
Thanks MT, will do. I will try to return the new cap and rotor set.
If the good cap and rotor never get cracked or damaged, can I just keep cleaning them every so often? Or do I need to replace them every XX,XXX miles? |
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05-08-2012, 03:31 PM | #5 | ||
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Re: 1996 Blazer Changed Cap and Rotor - now engine is chugging
Quote:
THE WHITE BUILD UP IS NORMAL. No problem. If you ever have cap off again just DAB A LITTL DILECTRIC GREASE ON TERMINALS. That is where the white build up comes from.
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Remember proper testing gives us the answer to many problems. MT |
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The Following User Says Thank You to MT-2500 For This Useful Post: |
mixin (05-08-2012)
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