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Old 11-25-2020, 02:41 PM   #7
sntrym95
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Join Date: Jan 2006
Location: Big Pine Key, FL
Posts: 745
Re: 89 k1500 misfire after head gasket

Quote:
Originally Posted by racerop View Post
I would look at the crank sensor
and the o2 sensors if all the things
mentioned by others are not the
issue
TBI doesn't have a crank sensor. The reference signal comes from the distributor.

Quote:
Originally Posted by HeavyChevy443 View Post
I've heard of there being a brown wire to disconnect on the firewall by the brake booster but I couldn't find that
On the 89 it should be on the passenger side of the engine compartment, roughly below the light that comes on when you open the hood. GM moved it inside behind the glove box around 94.

The warm up method is good, but I've always used this method without issue. http://www.centuryperformance.com/va...procedure.html
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