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crank no start

posted Jun 22, 2016 18:02:09 by Clark
Ford Windstar 1999 LX no spark but I have injector pulse no anti thief message on the instrument cluster check for 5V ref is present gnds connections are ok signal gnds are ok need more direction guys
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6 replies
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RobBrown said Jun 22, 2016 18:14:33
Hi Clark,
I assume you've checked for spark both at the plug end of the wire and at the coil towers. In the case you're getting no spark at all from any of the coil towers (which can be checked with a incandescent test light hooked to any metal part of the car) you'll want to back probe and check the inputs to the coil pack. One wire should be 12v all the time and the other three should be switching to ground in regular intervals. You could back probe those with a t-pin, connect your test light to battery positive, touch each pin with your test light, and watch for the light to flicker while someone is cranking the engine over. If all those signals are present, your coil pack is bad. If any of those inputs are missing, we're looking for something else. Good wiring diagram available on bbbind.com.

Rob
[Last edited Jun 22, 2016 18:30:17]
Just a dude who found a sudden and unexpected passion to bless folks who can't afford auto repair with free help. I never, ever imagined this is how'd I'd be spending my free time:-)
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Tyler said Jun 23, 2016 01:44:39
Agree with Rob. If there's no coil primary control present, then we'll work our way towards another issue.
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Clark said Jun 23, 2016 06:53:28
Rob remember is a four wire type I mean the coil pack.
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RobBrown said Jun 23, 2016 16:22:28
Clark, yes...four wires. The solid red wire should be 12v all the time with key on or engine cranking. The other three should be switching to ground while cranking. If all four wires are behaving as expected, bad coil pack. If those four wires give any other result, we look elsewhere. Let us know what you find!
[Last edited Jun 23, 2016 19:30:37]
Just a dude who found a sudden and unexpected passion to bless folks who can't afford auto repair with free help. I never, ever imagined this is how'd I'd be spending my free time:-)
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Clark said Jun 28, 2016 08:02:58
The switching comes intermittently like it fails am pointing towards the crankshaft sensor next
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RobBrown said Jun 28, 2016 16:08:12
If the switching truly is intermittent, then you would be getting SOME spark on the coil. It may be that it's just too fast for your test light to display consistently. Knowing that there's SOME switching occurring, but absolutely NO spark from the coil, I'd say your coil is bad. If, however, there IS an occasional spark at one or more of the coil towers, you're right to look elsewhere.
Just a dude who found a sudden and unexpected passion to bless folks who can't afford auto repair with free help. I never, ever imagined this is how'd I'd be spending my free time:-)
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