Question about 1994 GMC Jimmy

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1994 GMC Jimmy when driven for 2-3 hours, stop and go on errands, when stopped at redlight, then give gas to go again, it cuts out, bucks and backfires. scanner said the sensor that controls fuel amount to computer..mech replace this, ran good and smooth for 2-3 days, then when i had to run errands all morning, it started doing it again...mech took new sensor back and got another, put it on, it ran okay, but not as smooth as it usually did with new sensor, so I took it our for a morning of start and stop errands, and sure enough, it did the cutting out, backfiring and eventually would die...it starts easy when it dies, it just wont get up to speed and run without the cutting, coughing, backfiring. what else could this be?

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Spider injectior supply fuel to the cylinder when they go bad thats how they act hope

Posted on May 07, 2010

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