Question about 2007 Ford F-250 Super Duty Lariat
I have a 1986 Thunderbird with a 3.8 liter engine and the EEC-IV System. Recently it started misfiring badly after warmup. Replacing the distributor cap, rotor, plugs, plug wires, ignition control module and coil did not help. There is no check engine light and there are no error codes set. Digging deeper I found that the PIP out signal reads a steady 6.5 volts when it running ok and an erratic, averaging about 3.0, volts when it is running badly. If I disconnect the Spout (timing advance) signal to the ignition module , the PIP signal returns to a steady 6.5 volts and the engine runs smoothly. Any help would be appreciated. Thanks Posted via Deja News, The Discussion Network http://www.dejanews.com/ Search, Read, Discuss, or Start Your Own I have a 2000 f-250 v-10 that gets no power at cylinder 5. I have replaced the ignition coil for the three coils that were diagnosed as bad(5,6,& 10) on yesterday. But five keeps re-appearing as mis-firing from new diagnostics,and no power is shown from the volt-meter. Somehow five is dead even with all new wires, boots, motorcraft plugs etc. The computer is somewhat hot as compared to previous days, could it have shut-down coil five since 6 & 10 have cleared after replacing the two ignition coils.Is this an electrical problem ie coil five needs rewiring, or is this possibly a computer problem since it is awfully hot always now?
Could have a fuel problem where it isnt getting fuel in a cyclinder
Posted on Sep 15, 2008
Need to do a compression test even no that might not help if u dont the plugs,leads rotor, dizzy coil i cant see a problem unless the timing chain has jumped a tooth or 2 or even stretched
can be a computer problem 40 percent
can be needs rewired 60 percent
timing chain jumped 40 percent
Posted on Sep 14, 2008
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Posted on Jan 02, 2017
SOURCE: Ford EEC-IV Ignition Problem
if you have a set of noid lights check for injector pulse if you do not have pulse and no spark you have a bad pick up (hall effect sensor) inside the distributor this also would account for your prior problem with your timing because this pick- up (hall effect sensor) if it starts to short internally can effect ignition timing and missfires and also for the voltage changes
Posted on May 31, 2009
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