Newest Problem
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Newest Problem
Earlier the truck started by just flicking the key. I then ran it for about 1 minute and turned it off. I then tried to restart it and it will not start. My grandad stuck a screwdriver in the coil and grounded it and there were no sparks so he got a new ignition coil. It still will not start. I charged the battery which has 14.5 volts and the wire leading to the ignition coil has 14.5 volts when key is on and it falls to about 11.5 when trying to crank. I hooked up the spark checker to the ignition coil wire and tried cranking and it did not seem to spark (but the sparker seems to make more of a noise than a spark and with the engine cranking I could not hear it.). It started so well earlier what could be causing this new problem?
1986 Ford Bronco with '79 LTD II 8 cylinder 302 engine. Edelbrock Performer 500 cfm electric choke carburetor with Edelbrock performer 2121 intake manifold.
1986 Ford Bronco with '79 LTD II 8 cylinder 302 engine. Edelbrock Performer 500 cfm electric choke carburetor with Edelbrock performer 2121 intake manifold.
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From: Angier, NC
Ok with all your other posts don't know what do you have for IGN. System?
Stock 86 and if so what type is it TFI & computer or DSII or did you re-place it with aftermarket dist.?
I am going to say if no spark it is something with the IGN system but need to know what you have to point you in the right direction.
Dave ----
Stock 86 and if so what type is it TFI & computer or DSII or did you re-place it with aftermarket dist.?
I am going to say if no spark it is something with the IGN system but need to know what you have to point you in the right direction.
Dave ----
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From: Angier, NC
Did you try what Chris said using a test light on the neg of the coil?
Guessing it will not flash when cranking the motor over.
First I would pull apart all electrical connections to the dist. & DSII box on the left fender well and make sure they are clean and making good connections.
I would think if that all checks out it is 1 of 2 things.
1 DSII box on fender well is bad.
2 Pick up coil in the dist. is bad.
Pick up coil in dist. sends signal to the DSII box that then sends signal to the coil that sends spark to dist. cap.
Dave ----
Guessing it will not flash when cranking the motor over.
First I would pull apart all electrical connections to the dist. & DSII box on the left fender well and make sure they are clean and making good connections.
I would think if that all checks out it is 1 of 2 things.
1 DSII box on fender well is bad.
2 Pick up coil in the dist. is bad.
Pick up coil in dist. sends signal to the DSII box that then sends signal to the coil that sends spark to dist. cap.
Dave ----
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I connected the test light to the neg terminal and the filament turned orange when key was in the on position. When I tried to start it the light flashed quickly. Does it matter what coil I got to replace it with? I got this one (Accel Super Stock Coil 8140: Advance Auto Parts). It has nuts rather than slip on terminals, but it matched my engine.
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Found one problem. I made a rookie mistake and assumed the + terminal was on the same side as the other coil. I hooked the wires up correctly and the neg turns the test light non brightly when the key is on and it stays on.
I tried to start it and it started great, but all of that messing around up there disconnected the PCV and it ran at a super high RPM and then died. I tried to plug the PCV back in a restart and it will not start again. Flooded?It does exactly like before, cranking strong but does not run.
I tried to start it and it started great, but all of that messing around up there disconnected the PCV and it ran at a super high RPM and then died. I tried to plug the PCV back in a restart and it will not start again. Flooded?It does exactly like before, cranking strong but does not run.
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Joined: Nov 2015
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From: Angier, NC
Found one problem. I made a rookie mistake and assumed the + terminal was on the same side as the other coil. I hooked the wires up correctly and the neg turns the test light non brightly when the key is on and it stays on.
I tried to start it and it started great, but all of that messing around up there disconnected the PCV and it ran at a super high RPM and then died. I tried to plug the PCV back in a restart and it will not start again. Flooded?It does exactly like before, cranking strong but does not run.
I tried to start it and it started great, but all of that messing around up there disconnected the PCV and it ran at a super high RPM and then died. I tried to plug the PCV back in a restart and it will not start again. Flooded?It does exactly like before, cranking strong but does not run.
Dave ----
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I will try will quick. I out a spark tester in the #1 wire and turned the distributor with the key on which gets it to spark usually, but it did not this time, so I am not getting power all the way to the plugs. I will check the test light and get back on that in a sec.
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I hooked the test light to the neg and the filament turned a faint orange. I then jumped the solenoid and the light flashed (not real bright, but it did flash). I then tried to hook the test light to the positive and it lit very brightly. I then tried to jump the solenoid with the test light on the positive and when I touched the solenoid the truck started with no hesitation. I got the RPM's right and the timing to 8 BTDC and left it running. Why is it cycling? Was it just flooded?
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From: Angier, NC
It could be flooding or the box could be flaking out.
I had a non Ford that used the DSII system from the factory (76 AMC 258/6 Gremlin wifes car) it would start and run fine. After a min or 2 of warm up put in gear back out of parking spot change to drive and pull up to gate wait for it to open then 200 ft to stop light and it would shut down.
Same thing in mornings short warm up drive 1/4 mile to stop light and it would shut down.
Replaced box and all was fine after that. Because it was the wifes car and the short warm ups and stalling I was always looking at the choke.
So don't overlook the DSII box it can do strange things. No spark (check at the coil not at a plug is a better place to test) thinking box (icm)
Dave ----
I had a non Ford that used the DSII system from the factory (76 AMC 258/6 Gremlin wifes car) it would start and run fine. After a min or 2 of warm up put in gear back out of parking spot change to drive and pull up to gate wait for it to open then 200 ft to stop light and it would shut down.
Same thing in mornings short warm up drive 1/4 mile to stop light and it would shut down.
Replaced box and all was fine after that. Because it was the wifes car and the short warm ups and stalling I was always looking at the choke.
So don't overlook the DSII box it can do strange things. No spark (check at the coil not at a plug is a better place to test) thinking box (icm)
Dave ----
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Ok. What else should I look for in a failing box? Also, like I said before in another thread my fuel pressure can be as high as 9 psi with carb max recommendation of 6.5. That would not account for the failure to spark though.
