Try looking for crossed HT wires and incorrect firing order for the plugs
SOURCE: won't run with the correct firing order
hi the firing order for a 5.0-302 is 15426378 and the fireing order for a 351is 13726548 save to file and zoom in
SOURCE: 1988 Ford Crown Vic Strange Idle
When you turn the key on does the check engine light come on? If not it may be burned out. It sounds like a MAP sensor or an O2 sensor is bad. I would suggest taking it to autozone as they do free diagnostic and seeing if a code comes up. If it is a sensor it should, if not it may be the idle sensor not reading right in the ECU. More than likely it is one of the sensors though.
SOURCE: 1996 Ford Windstar engine runs rough
DIS ignition, no distributor to " get in there " with....
SOURCE: 1997 Ford Contour with a rough idle while stopped
This is a common complaint on these cars. I own a 96 myself.
Assuming that you engine is fine and runs smoothly under normal operation, and just is rough "feeling" at idle while stopped; then I would suggest changing the motor mounts...the mounts may not be broken, but the rubber isolators get worn and soft, and transffer normal engine vibration into the chasis of the vehicle. Mine was doing the same after changing the mounts good as new again.
Please note...don't use cheap mounts, by the better grade/quality mounts.
Btw, I’m available to help over the phone in case u need at https://www.6ya.com/expert/sean_54c3a3dc48a7773c
SOURCE: u i have a 97 ford escort that idles rough so i
It could be the fuel injectors. They have a small orfice and close up easily with deposits causing lean idle or in extreme cases lean idle misfire. Unplug electrical connection to each injector while idleing and the one with the least amount of chang is the offending injector.
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