Radom misfire in #5
01-19-2004, 11:52 AM
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Radom misfire in #5 how can I trouble shoot this misfire. I have changed plugs, next change wires then run seafoam through motor? How would an auto repair shop fix it just by using the process of elimanation and i get charged for all the parts i listed plus labor? thanks guys
chet
chet
01-19-2004, 03:08 PM
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Swap injectors between #3 and #5 and see if it moves.
If so, replace (or at least clean) the injector. Same deal
with wires, coil packs. Check for single-runner intake
manifold vacuum leaks (head, injector O-rings). That
kind of thing; costs nothing but time.
If so, replace (or at least clean) the injector. Same deal
with wires, coil packs. Check for single-runner intake
manifold vacuum leaks (head, injector O-rings). That
kind of thing; costs nothing but time.
01-19-2004, 07:50 PM
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While they seldom fail outright I have fixed two cars in
the past that had poor / rough running due to one injector
being poor-flowing; the imbalance, in a closed-loop
system that controls by average, makes that one cylinder
lean and prone to misfire.
On the other hand, I have yet to ever have a bad plug
wire in 25 years of self-maintaining vehicles (except for
one that kept falling off, on the El Camino; but that
wasn't actually bad, only loose, and fixed with pliers).
Check the easy stuff off in whatever order you prefer....
the past that had poor / rough running due to one injector
being poor-flowing; the imbalance, in a closed-loop
system that controls by average, makes that one cylinder
lean and prone to misfire.
On the other hand, I have yet to ever have a bad plug
wire in 25 years of self-maintaining vehicles (except for
one that kept falling off, on the El Camino; but that
wasn't actually bad, only loose, and fixed with pliers).
Check the easy stuff off in whatever order you prefer....
