I have a 1994 F150 etra cab 6cyl with 138K miles.
when cold the check engine light stays on and the motor won't start
untill it goes out or I turn off the ignition and pump the gas pedal
then turn on the ignition. It will start but runs missing and has no
power, the transmission won't shift automatically, the exhaust smells
like sulphur and gray black smoke comes out. The overdrive switch
won't light up and the usual electrical static and engine noise on the
radio (AM BAND)goes away and sometimes the radio display won't come
After a while the light will go out and the engine runs smooth the
trans works great and the noise on AM radio comes back, Or I can after
a while turn off the switch and usually the light will go out and all
runs great. For several hours all will run great, then it will light
up again and start missing
I have taken it to several shops, but none agree on what the problem
is, because they can't read the codes on the computer. When the chk
eng light comes on and all the problems occur the diagnostic code
reader or analiser they connect to the engine won't work and won't
reconize it. How ever once the light goes out the analiser works fine
but reports that all codes are cleared and they can't make a
diagnostic.Help!!!!!!!!! If anyone knows what the problem can be
please post or send email to:
ED at firstname.lastname@example.org or email@example.com
===========================Sounds like you have a bad ground or power connection. I would start at and
near the battery. Because of the corosive nature of lead-acid batteries,
connections usually corode near the battery. Check and clean the battery
cables and look around the battery for corrosion on powers and grounds. GL
Outgoing mail is certified Virus Free.
Checked by AVG anti-virus system (http://www.grisoft.com ).
After checking that, check the engine to firewall/body grounds then the
harness to body ground next to the PCM (computer).
BUt it sounds to me like you may have a problem in the module itself.
If the above doesnt do it, find a replacement in a scrapyard, same
model/engine/trans of course.
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