2002 Suburban runs rough
August 13th, 2011, 3:12 PM
#1
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2002 Suburban runs rough
When you put a load on it is when you can tell it is running rough. First, I have changed: the fuel pump, fuel filter, fuel regulator, plugs 2x, plug wires 2x, 5 of the fuel injectors,and 5 of the coil packs. When you get to about 2000rpms you can feel it start to get rough then it will smooth out and run pretty good. During this time the check engine light doesn't come on. When you are say driving through the mountains with the cruise on when the speed slows and it puts a big load on the engine the check engine light will come on and flash until you reach the top and the rpm,s go back down. I have had a diagnostic test done and the person said the no. 5 cylinder was misfiring so he put the 5 coil pack on the no. 2 and switched them and it them ran very good for about 2 days and then back to rough again. This oringinally started with the no. 7 cylinder misfire, this was a bad fuel injector, then the problem moved to a no. 4 misfire then I changed it and now i am where up to where this question starts at the top of this page. PLease please someone give me good useful advice.
Thanks
Thanks
August 14th, 2011, 1:19 PM
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idles great, and when you are running at say 70 with cruise on it seems perfect, you can only tell it when you are pushing more gas to it, so as when you need the extra to get up a hill
August 14th, 2011, 3:23 PM
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Come on. If you read the message you know I changed 5 for the injectors, 5 of the coil packs along with the plugs and plugs wires. Of course I have tried cleaner I have put gallons of it in by now.
August 14th, 2011, 3:30 PM
#6
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August 14th, 2011, 5:45 PM
#8
WTF? None of us are mind readers. What you don't include in your post, we can't know. Do you know what a freeze frame is? If so, how about posting the freeze frame data to go with the flashing malfunction indicator?
BTW, vBulletin allows one to modify or delete one's own posts so as not to look the real ***.
BTW, vBulletin allows one to modify or delete one's own posts so as not to look the real ***.
August 14th, 2011, 7:19 PM
#9
CF Monarch
Lets be friendly here. You are having a problem with your car, understandibly. With that I am no expert especially on the newer vehicles as I too am trying to learn.
All I can do to try and help is reanaylize your problem. I hope someone can help you with it. I understand your frustration, and again will try with what I can to help with suggestions.
All I can do to try and help is reanaylize your problem. I hope someone can help you with it. I understand your frustration, and again will try with what I can to help with suggestions.