bad ground?
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bad ground?
my 1996 f150 4.9L I6 has starting problems, no spark....will the batter ground being bad (as in my friend touched it and it came apart) cause that? Also my friend put his OBD II comp on to it and it said it was at 6000 RPM...with the truck off. I know a bad ground can screw alot of things up....also he turned the power dist. box upside down....put it back then used jumper calbes for a ground....started the truck up it ran fine. Then i started it and it started smoking from the fuse box area....any ideas? I flipped it back over and nothing looks burnt/melted
Last edited by brett12396f150; Sep 19, 2009 at 01:02 PM. Reason: more info
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My truck is weird....turn the key engine light turns on....then the pump will turn on off on off....and itll start so i assume its doing the same with spark seeing as it has no spark from the coil when this happens. But when the pump turns on the engine light goes out...could this be my PCM?
Also if i tap the run relay with a screwdriver while the truck is running the engine will kind of rev....maybe all this could be due to a bad connection between the relay and the power dist. box? Its a new relay and the wires arent loose.
Also if i tap the run relay with a screwdriver while the truck is running the engine will kind of rev....maybe all this could be due to a bad connection between the relay and the power dist. box? Its a new relay and the wires arent loose.
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I fixed the main ground from my battery....and what do you mean ALL my grounds? As in everything on the trucks ground is bad?
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From: In my own world
my 89 was. you have 1 for the computer on inside drivers fender. 1 for fuel pumps behind drivers head light, inside core support. 1 for eec by battery, 1 for block to firewall, and 1 for winshield wipers. not to mention several frame to cab. I also added a 10 guage wire from the neg post to the bolt that holds in the radiator to the core support.
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No fixing the main ground did not help....its a weird situation....engine light came on though, hoping it threw a code other than it stalling...doubt it though. You sure it doesnt have anything to do with the run relay, cause if i unplug that it acts like it does when the relays in and its taking one of its no start fits....just dont hear the pump initially kick on.
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battery cables were fine, it doesnt smoke anymore....nothing looks burnt...yes i hear the pumps kick on...but as i said sometimes they go on and off on off on off....then it will start....however when it doesnt start theres also a spark issue
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pull the connectors off the fuel, and eec relays, and clean them good, use contact cleaner, they may be corroded, and definately work on the grounds. if it still does it, you may need a new modual, its on the drivers fender on yours. you are not going to get any codes at this point, from haveing the battery un hooked, you have to go through 60 key cycles before the computer re learns .