[DML] Re: Engine misfiring-Updated-

["TalksToGod" <5n-@xxxxxxx>]

Here is some updates on the problem-The engine only misses at
1,000-3,000RPM Driving only. When the car is sitting and it is reved
up and held, it doesn't miss at any RPM. Brand new 8MM wires were
installed a few months ago with MSD hot coil, as well as spark plugs
(+4s) and vacuum advance. Checked all the plugs, everything looked
fine. No water was in the wells. Made sure all the wires were
installed completely on the plug. Checked the vacuum advance, and also
the solenoid (ticked when I unhooked electical plug with ign on). Made
sure my idle motor switch was working. Motor sounds changed when I
pulled the throttle with the ign on and engine off so I assume it is
fine. Everything check out okay. Only misfires beyond 1/3~1/2
throttle, if throttle is below this it will not misfire. The car
shakes a lot while it is misfiring. Alternator is
fine so it can't be a power issue. My thought was perhaps one of the
timing chains skipped a tooth, but with it not missing at 1/2 throttle
or above 3000RPMs I am not sure this would be the problem. In any gear
(manual trans) once the tach hits 3,000 or maybe 3,200, it straightens
out and runs smooth. I will dig out the cap/rotor tomorrow and see if
that can be the problem. Can it be a fuel thing?-Pump maybe? With
these symptoms perhaps someone can slim the problem down to just a few
parts to check out. Thank you so much for all your help -Dan B
VIN#5003




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