Have you ran trouble codes yet? Most auto stores have a reader you can use now a days. Problem sounds like fuel overload at lower rpm and can be caused by bad throttle position sensor or mass air sensor.
SOURCE: 98 gmc sierra sputters and clacks when first accelerating
I wouldn't think it to be a fuel delivery problem anymore.If you could get someone to scan it while the problem occurs maybe you could see if your TPS is dropping out due to a faulty sensor or connector,also you could check for a blocked cat convertor by hooking up a vacuum gauge to the engine or a pressure gauge to the exhaust at 1500rpms should be no more than 1 to 1 1/2 pounds back pressure. Also you could check your magnetic pole piece that is under the rotor in your distributor they are known for the magnet cracking at the rivets.
SOURCE: Sputtering, chugging, black smoke - won't restart when hot
check your tail pipe for a "clog" engine not breathing correctly.
SOURCE: My 1999 GMC Sonoma(manual transmission) sputters
Change fuel filter, plugs and wires.
Check for any vacuum hose leaks.
Check gas cap to make sure seal is not broken
Check fuel pressure and spark to all cylinders.
If check/service engine light is on, have an engine diagnostic test done to pinpoint exact problem.
SOURCE: 99 GMC Sierra 5.3L sputtering and hesitating
Check TPS for smooth and linear electrical response over the entire range of motion. If the response is jumpy or erratic at all, replace TPS.
Thank you for using fixya and good luck.
345 views
Usually answered in minutes!
no i have not done that yet, i plan to do it tomorrow before work, it just started late last night. the mass air sensor, what does it actually do? am i able to do it myself if that is the problem.? i know alot of times when you have autozone run the reader on the truck some things dont show up, is that one that will show up or does it have to be sputtering at that moment to show up? because after you drive awhile it doesnt do it that much just every once in awhile. thanks!!
×