Question about 1995 GMC Jimmy
After it cuts off it takes about 1 or 2 hours and it starts right up with no problem and will run for a couple days before it happens again.
Back in the day, we called this vapor lock, caused by fuel lines too close to hot parts on the motor. Also could be a dirty fuel filter, and there is another in the fuel tank, a last resort check.
Fuel lines can be insulated, use something fireproof, heat proof. There is a tape sold as muffler seal, it's pretty tough.
Posted on Nov 26, 2013
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Posted on Jan 02, 2017
I don't know what the STP cleaner may have done; I had a similar problem where my car would idle very low when stopped or in a drive-through waiting. It turns out there was black soot on the engine intake. I disconnected the rubber hose from the air filter at the engine (take cover off, loosen 1 clamp). I used a spray can of throttle body cleaner and wiped the area clear. I then had my dealer perform the programming change for a service bulletin that mentions throttle body coking.
Posted on Dec 31, 2008
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