Question about Harley Davidson FLHTCUI Electra Glide Ultra Classic Motorcycles

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Runs ruff at start up hestation and slight popping. not getting good spark my be wires

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Theres a few thing you can check

1. make sure theres a connection between the coil and the plug
2. make sure the coil is working good
3. replace coil if needed

Posted on Mar 26, 2011

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97 ford Taurus runs ruff backfires


I would suggest you start with the basics. Check your wiring on your spark plugs to ensure they are in the right order. If you can grab an OBD scanner, I'd start with it as well. It can reveal many mysteries. Your running rough usually sounds like a timing issue. If there are over 100,000 miles on the vehicle, the timimg belt will be suspect.
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If 02 sensors are bad, car will act the same way. Does sound like timing though which is controlled by your car's computer.

You can go to autozone.com and register for full free online repair manual.

If you have a testing light, you can connect it to #1 plug wire, then aim at crankshaft pulley while someone else turns car over. Then you can see if the timing is off.

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