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What is wrong with a 1990 Ford f150 with a 6 cylinder if there is power going to the coil but no spark?


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Wiki User
2005-08-06 02:27:55
2005-08-06 02:27:55

Check your frame ground Check the pickup coil and module in the dist. Also the crank sensor . goodluckJoe Check for a broken wire in one of the cluster of plugs on top of the left wheelwell.


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If you have the wrong leads going to the wrong spark plugs, then you will have a spark when the cylinder is somewhere other than where it should be, which is at the top of the compression stroke ready to drive the piston down and provide power. If you can start your car, it will be running very rough, have no real power at all and your gas mileage will be measured in gallons per mile. You are also running the risk of serious internal damage to the very expensive valves, so I suggest you fix it immediately.

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I'd suspect a bad spark plug at first. Which could be the GAP setting is wrong or the plug itself is bad. There can be other more expensive issues going on, but I'd start cheap and work up.

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The timing is too low or it has the wrong spark plugs in it.

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Wrong gap, wrong plug, poor groound when you are looking at the spark,

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On mine it had a bad carbarator and water in its spark plug.

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