bad spark ?
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New User
Joined: Jul 2013
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From: winnipeg
bad spark ?
My truck only gets 1 spark at the beggining of turning it over and once you stop turning it over, so only 2 sparks during it turning over it won't spark just at the end and at the beggining. What do you think it is ?? Sorry if that doesn't make sense I just don't know how else to describe it
Tuned
Joined: Dec 2011
Posts: 408
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From: South Carolina
My truck only gets 1 spark at the beggining of turning it over and once you stop turning it over, so only 2 sparks during it turning over it won't spark just at the end and at the beggining. What do you think it is ?? Sorry if that doesn't make sense I just don't know how else to describe it
Have you checked the spark from the coil? Maybe disconnect the coil wire from the dizzy cap and make sure the coil is firing as it should. If it is, track the problem from the dizzy cap to the plugs. I had to do this recently and found out the #7 and #8 terminals on my dizzy cap were not conducting as they should. There was a bit of corrosion (on the underside of the cap) on those terminals.
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New User
Joined: Jul 2013
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From: winnipeg
How were you confirming this?
Have you checked the spark from the coil? Maybe disconnect the coil wire from the dizzy cap and make sure the coil is firing as it should. If it is, track the problem from the dizzy cap to the plugs. I had to do this recently and found out the #7 and #8 terminals on my dizzy cap were not conducting as they should. There was a bit of corrosion (on the underside of the cap) on those terminals.
Have you checked the spark from the coil? Maybe disconnect the coil wire from the dizzy cap and make sure the coil is firing as it should. If it is, track the problem from the dizzy cap to the plugs. I had to do this recently and found out the #7 and #8 terminals on my dizzy cap were not conducting as they should. There was a bit of corrosion (on the underside of the cap) on those terminals.
Tuned
Joined: Dec 2011
Posts: 408
Likes: 2
From: South Carolina
Try this. Disconnect the coil to cap wire from the cap and hold it close to a some metal on the block, a bracket or anything else that will conduct electricity. You should see the coil producing a bright blue arc and in rapid succession. If it is the coil is good and the problem is downstream from that.
You can disconnect each plug wire on the engine side and using a screw driver repeat the same test. Holding the screw driver in the plug terminal and on the metal clip, hold the screw driver shaft close to some metal on the block or again a bracket. You should see an arc every time the rotor fires on that terminal. You could repeat that process on all spark plug wires.
I'm sure someone else on here can give you some more precise guidance but I would test from the coil, to the cap, through the wires and to the plug to determine where the issue is.
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New User
Joined: Jul 2013
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From: winnipeg
What I meant was like I pulled out all the plugs one by one and checked it for a spark they all did the same pattern it wasn't a constant spark it was just one single spark at the beggining of it turning over and one after you let off. I will check that coil as you said and let you know. My friend said it might be the pickup coil in the distributer or maybe the ignition module ?
Postmaster
Joined: Mar 2011
Posts: 2,698
Likes: 7
From: Taxachusetts
You're not supposed to get a constant spark - you don't have a Tesla coil for a distributor! The same plug will fire (spark) once every 360 distributor degrees...once every time the rotor (inside the distributor) makes a circle.
Do you have fuel getting to the cylinders? Have compression in the cylinders?
Do you have fuel getting to the cylinders? Have compression in the cylinders?
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Joined: Aug 2018
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Oh man!
This thread just ended abruptly! It was like reading a really good novel then finding that the last 1/4 of the book had been ripped out. How does it end!? Did the truck survive? Did the problem get resolved?! I need to know these answers!
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New User
Joined: Jul 2013
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From: winnipeg
holy crap what a blast from the past here haha. Surprised I even remember my password ! I ended up getting a new distributor with a build in coilpack it ran for a few hours than died again so I ended up freaking out and selling the truck for so cheap lol poor old girl.
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