Question about 2000 GMC Jimmy

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Flat spot on acceleration

Randomly get flat spot on acceleration. seems as fuel not going thru injectors

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Is the check engine light on? Check the air filter check the TPS

Posted on Jan 12, 2013

Testimonial: "Thanks i will check air filter and change it."

  • blackforest Jan 15, 2013

    Thanks .I have not yet changed the air filter. The problem has not reoccured.

  • blackforest Feb 17, 2013

    I have changed air filter. The problem reoccured . I wonder if fuel injector would help. The vehicle has done about 160K


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depending on mileage, but possible tune-up could fix it. if already done then check ignition coil pack and ignition wires also spark plugs, check vacuum hoses for leaks or porous, last injectors clogged - use some techron fuel injector cleaner (wal-mart has them). Also get the throttle body and iac valve cleaned by throttle cleaner . Also this other possibilities are to be checked and confirmed.:---- Engine running rough or misfiring can be cause by the following:

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I am an experienced Technician , have over 30 years in the business , Chevy , Cadillac , Ford , Chrysler . An sonny your not old enough to be experienced. > sounds more like your like most people who post on here a glorified parts changer .

i believe its a bad TPS that i have already replaced 3 times. but i balieve the TPS is giving a dead spot and probably an off injector pulse width.???????????

WE TEST , NOT GUESS ! Take it to a quaified repair shop ,or go to a good automotive technology program an learn the correct way to fix automotive electronics . The industry is hurting for good Tech's , not back yard wantabees

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i will recomend you to do a tune up and add some injector cleaner to the fuel tank, use the brand techron or si-1 from redline products
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