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How do I diagnose a 97 Chevy s-10 cutting out at constant speed?

January 8th, 2011 · No Comments

I have a 1997 Chevrolet s-10 (s10) 2wd ext. cab w/ the 4.3L V6 vortec engine and manual transmission. The truck starts easily, but it cuts out when driving at constant speeds. It seems fine during acceleration and at idle, other than some clanking sounds (not sure if this has anything to do with the problem or not), but as soon as I try to maintain a constant speed, it starts to hiccup every couple seconds. I am not experienced in auto repair, but research points me towards fuel pump and/or filter. Is there a way to diagnose this without fancy tools? A fuel pump is a lot more to replace than just the filter, so is there a way to differentiate which might be bad, if either? Other ideas?

- Perhaps there is a short somewhere and it is causing this problem. A good mechanic will be able to tell you what it is. but could also be something with the timing also. I would choose the cheapest route first. Then work up.
- Start out with changing the filter first, then if that dont work, then yes, you should change the fuel pump. If its never been changed, it is probably due for a new one. If its fuel injected, try puttin a bottle of the cleaner in a tank of gas.
- There is no way to diagnose a bad filter, you just have to replace it,and that’s a cheap part anyway, but id try that first, if that don’t help it none at all id try and see if its in time, if it has a distributor in it, it may be way out of time,,this will cause it to do this also,other than that all you can do is check everything like the plugs and wires, and go from there, these kind of problems are hard to diagnose and you never know what will cause them.

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