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Old 05-12-2009
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My truck won't start

Hi there....

Just curious if anyone knows what may be wrong with my truck!

It is a 1999 Ford Ranger 4x4 - 6 cylinder - 4 liter - Manual Transmission

Other than it hesitating going up hills occasionally (which I think is from old plug wires) it has been starting and running fine. Now the engine won't even attempt to start. The starter works and turns over, I pulled the gas line out and it spits gas when I try and start it. So the fuel pump should be alright. When I pull a plug wire and stick a plug on the end I got no spark while trying to start nor could I get one out of the coil pack. I think that it is the coil pack that is failing, but hate to spend the 100 bucks without a second opinion. A mechanic cousin of mine believes that if it was the crank sensor that was failing that the gas pump would not pump fuel.... Any thoughts? Thanks!
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Old 05-12-2009
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Seems like the pump would still work with a bad crank sensor, but the injectors just wouldn't pulse. If you have injector pulse I would guess a bad ignition coil or module.

And the "ignition module" might be an internal part of the ECU, at least that's what I think I read somewhere...

Last edited by BlutoBodine; 05-12-2009 at 11:28 AM.
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Old 05-12-2009
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How would I know if I have "injector pulse"
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Old 05-12-2009
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Quote:
Originally Posted by cjames View Post
How would I know if I have "injector pulse"

With a test light - you can buy or borrow from a friend the correct single noid test light, or you can probably rent or buy a test set similar to this:



The entire sets usually go for about $20 if you buy it.

Just watch the light while cranking and you should see a steady pulse if it's working okay.
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