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The lack of input from the OBD port is hurting your ability to make a diagnosis, and it may also point to the key error. So, when reviewing the wiring diagram I would focus on that problem first. It may be just a fuse (that appears to be OK but doesn’t let juice pass), so I would look again at your fuse bank with your power probe.
update…. i finally found the problem with the truck i took all the tape off the off the main harness on the firewall and found 4 blown fusesable links so im gona buy 4 new fuses links and i will have a running truck (i hope)T)
Yea it sounds like you’ve had some not so dedicated people working on that in the past, nice find, keep us posted.
i have one Question after starting the truck i hooked up the code scanner to look at the live/view data and the passenger side fuel injector is reading -14 at cold but at normal operating temperature its -6 and the driver side is fine. does that mean the passenger side is starting to clog up?. i have 4 new o2 sensors its a f150 with a 4.2l v6
On a Ford if you are thinking PCM then think again and again before you buy one, they rarely go bad. Make sure your conections at the PCM are good. I would bet you have a crank sensor problem.
Quoted From jesse166062:
On a Ford if you are thinking PCM then think again and again before you buy one, they rarely go bad. Make sure your conections at the PCM are good. I would bet you have a crank sensor problem.
if i have a crank sensor problem would it set off a code on the computer?
Quoted From F150guy82:
if i have a crank sensor problem would it set off a code on the computer?
Sometimes they don’t.
I had a car awhile back that had a missfire code but no cranksensor code.. the crank sensor bolt came out and it was just hanging there, after putting a new bolt back in the code never came back.Quoted From F150guy82:
i have one Question after starting the truck i hooked up the code scanner to look at the live/view data and the passenger side fuel injector is reading -14 at cold but at normal operating temperature its -6 and the driver side is fine. does that mean the passenger side is starting to clog up?. i have 4 new o2 sensors its a f150 with a 4.2l v6
Are you looking at fuel trim numbers, pulse width or duty cycle of a particular injector?
I don’t know this vehicle, but I remember something about crash sensors shutting down the fuel and spark as a safety issue… Something to consider and possibly reset… Good Luck!
[quote]Quoted From dreamer2355:
Are you looking at fuel trim numbers, pulse width or duty cycle of a particular injector?[/quot
yes.. its the live data and says Short term and Long term fuel trim
The job of the LTFT is to keep the STFT to as close to zero as possible.
Your STFT numbers will be varying during vehicle operation. However, if you have negative LTFT numbers, that usually means the vehicle is taking away fuel due to a rich condition. If the numbers are positive, the vehicle is adding fuel to compensate for a lean condition.
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