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Hi guys. I browsed the forum and didn't see anything on this so forgive me if this issue has been addressed before. My girlfriends 2000 silverado 4x4 v-6 vortech 5-spd manual, has a chugging problem. It comes and go's the dealership cant find a problem... the only fix i have found so far is changing the rotor&amp;cap whenver it starts happening. It usualy occurs in 4th around 2,000rpm but like i said it could do it on the way to the store then not again for 2-3 days... Any help would be greatly appreciated. I have tried a 'tune-up with only temporary results. so please let me know if anyone else has this issue or a solution.</P>


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thanks</P>

 

u could have some bad fuel injectors. they could be clogged or just not spraying properly

 

i have added injector fuel system cleaner to the fuel many times with no results. the dealership ran a diagnostic and said nothing was wrong at all. now i know a fair bit about engines and basic fixes but nothing i have tried works just wondering if anyone else here has this problem or knows what it could be .</P>


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i have a 2000 v6 also, but its has an automatic trany, when the fuel prices where really high i used cheap fuel for a couple of months, it messed up my air sensors, all four of them, i ran the programer diagnostic and eareased the check engine problem from the computer, it work fine for like 2 weeks then the problem started again, ended up changing the sensors and now it works fine