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Old 12-15-2021, 04:41 PM   #1
RedHeadedGuy
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Angry 88 Blazer 4.3 idle issue after head gasket replacement

I replaced head gasket, and all gaskets up. Fixed vacuum lines, had to time off timing chain alignment. no timing marks, tab missing. I can get to start right up, then idles really high then surges really quick a little higher rpm, also has sputtering to it. What Should I do now?
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Old 12-15-2021, 04:43 PM   #2
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Re: 88 Blazer 4.3 idle issue after head gasket replacement

Also Distributor was little rusty, and i cleaned all the heavy build up out of tbi
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Old 12-15-2021, 04:56 PM   #3
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Re: 88 Blazer 4.3 idle issue after head gasket replacement

If its idling high and surging it sounds like you have a vacuum leak.
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Old 12-15-2021, 06:53 PM   #4
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Re: 88 Blazer 4.3 idle issue after head gasket replacement

+1 on the vacuum leak.
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Old 05-12-2022, 02:05 PM   #5
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Re: 88 Blazer 4.3 idle issue after head gasket replacement

Check your Intake Manifold Gaskets while at Idle by spraying WD-40 or Carburetor Cleaner around the Gaskets, and anywhere else where a leak might be found. If you have a leak, you should hear the engine Rev a little when sprayed.
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