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Old 12-11-2016, 07:25 PM
 
2 posts, read 567 times
Reputation: 10

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Working on a GMC sierra c1500 4.3l v6.. I drove it the first time and noticed stuttering or hesitation. I changed plugs, wires, cap, fuel filter, injectors are clean and didn't really help. Then I noticed it hesitates a couple times right before changing gears so I thought maybe it was a transmission problem. So I took a look at the trans fluid and it was dirty and smelt a little burt.. So I changed the trans fluid and replaced the filter. Still didn't help..... Ive checked the mass air flow sensor and the air filter and it looks clean. I don't think its a fuel pump because it literally starts right up every time. Any ideas or things that might help????
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Old 12-11-2016, 11:29 PM
 
Location: Northeastern Pennsylvania
106 posts, read 52,213 times
Reputation: 221
Test fuel pressure. or have it tested. My 1991 GMC K1500 acted the same way. I didn't think it was the fuel pump either. It was.


TU
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Old 12-12-2016, 07:29 PM
 
2 posts, read 567 times
Reputation: 10
alright. Ill hook up a pressure gauge to it tomorrow. Thanks brotha
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