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...is it throwing any codes, if it is post them up so we can see
whats happening....and make sure you have a fully charged
battery....
 

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Check your alternator. Have it tested. May not be putting enough juice for a good spark till higher RPMs.

How old are your plugs and wires?

Any smell of raw fuel? (Running rich, not all burning) Sniff at tail pipe.

My 93 was doing the same as U discribe till Alt went all the way out. Replaced and fixed prob. (for awhile) LOL

Now a few months later it's doing it again but I have a rotten OME coil wire, so again I'm having weak spark. Planning a tune-up soon.

Prosses of illimanation. Check cheap do it yourself fixes first.
 

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Discussion Starter #7
my opti is no more than 6 months old , and its a delphi unit , ive never replaced my spark plug wires, im sure one of my injectors is leaking , and ive never replaced my throttle position sensor , the idle control was replaced not to long ago , the plugs are new , the only code its throwing out is :Quad Driver Module #26,
 
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