F150 ROUGH IDLE, ENGINE LOPES

1997 Ford F-150

Tiny

zedman57

February, 26, 2009 AT 7:10 PM

Engine Performance problem
1997 Ford F150 6 cyl Two Wheel Drive Automatic 482000 miles

Engine idle is very rough and it lopes and sometimes it cuts out. I've replaced the plugs and wires and it still idles like crap. I connected a timing light to #1 cylinder and found that the spark cuts out and is the same for all the other cylinders when I checked them the same way. When I drive on the highway there are no problems it seems to run fine, but around town its a little rough. Could it be the coil pack or ignition module. Please help !

FOUND 2447 RELATED QUESTIONS

2 Answers

Tiny

rangerdanger17

February, 28, 2009 AT 1:50 PM

The ignition module either works or it doesnt the coil pack could be the problem

Tiny

johnnieandpam

February, 28, 2009 AT 8:16 PM

Could be leak in vacuum line or intak gasket

Please login or register to post a reply.

Vacuum Leak Test and Repair - All Cars
Cylinder Head Valve Job Guide
Fuel Injector Replacement Ford 5.4L V8