Spark tick? Then miss?
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Spark tick? Then miss?
Hey everyone,
Hoping someone out there can help me identify a noise coming from around my battery compartment near or below my Map sensor.
The noise sounds like a spark grounding itself out, and happens when I open the throttle from the engine compartment. If I raise my RPM just enough it will sound off in rapid sucession.. TICK..TICK ..TICK It also seems to be causing an engine miss. I would appreciate any input.
Thanks much,
Seeker
1986 E150 302 EFI
Hoping someone out there can help me identify a noise coming from around my battery compartment near or below my Map sensor.
The noise sounds like a spark grounding itself out, and happens when I open the throttle from the engine compartment. If I raise my RPM just enough it will sound off in rapid sucession.. TICK..TICK ..TICK It also seems to be causing an engine miss. I would appreciate any input.
Thanks much,
Seeker
1986 E150 302 EFI
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Joined: Nov 2002
Posts: 9,987
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From: Memphis, TN
Spark tick? Then miss?
It's probably a spark jumping to ground. 
Wait till dark and do it. You should see where it happens, and you can just slide the spark plug boot down the wire a little further to stop it. It takes a lot of force to do it, so don't jerk the boot off the wire because they're a pain to put back.
Wait till dark and do it. You should see where it happens, and you can just slide the spark plug boot down the wire a little further to stop it. It takes a lot of force to do it, so don't jerk the boot off the wire because they're a pain to put back.
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Spark tick? Then miss?
Steve83, I'm pretty sure the
spark noise is coming from near my battery where my map sensor mounts to the sidewall or below. I've checked and rechecked for sparks at the engine. I waited til dark to see if I could isolate the noise, I was able to here it loudly near the batt. but no blue spark anywhere.
spark noise is coming from near my battery where my map sensor mounts to the sidewall or below. I've checked and rechecked for sparks at the engine. I waited til dark to see if I could isolate the noise, I was able to here it loudly near the batt. but no blue spark anywhere.
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From: Memphis, TN
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Spark tick? Then miss?
Thanks Steve83,
I'll see what I can find and keep you posted.
Thanks again
I'll see what I can find and keep you posted.
Thanks again
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Spark tick? Then miss?
My 86 F150 302 EFI was doing the same thing. When working the throttle from the engine with the hood open there was a ticking noise, like grounding out near the battery and MAP. The plactic box in back of the battery that houses some vaccum line was the spot. There are 4 connectors with electric and vaccum connections in this box cover. I unplugged them one at a time to find out which it was. The one closest to the MAP, or right front fender was the one. Can't figure out what it was doing. Am at work now so I'm not looking at my Haynes so can't tell you what it does. Didn't seem to affect the running of the truck. Anyone know what this is and why it's doing it?
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Joined: Nov 2002
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From: Memphis, TN
Spark tick? Then miss?
No. They're low-current and powered straight off the EEC power relay, so they can't affect the ignition, and the EEC would throw a code if any of them were electrically bad.
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Spark tick? Then miss?
I have an 85 5.0 efi. I have the same ticking by the batt. It was the plug closest to the finder that was ticking. The problem with stumbling right off of idle did not change. It idles a little rough sometimes, but my trouble is the stumble right off of idle. it seems probably 700-1000 rpm range. I just bought this truck and would love to get this fixed. checked the throttle position sensor and seems fine, just seems like a timing problem? It make a arcing sound right off of idle as well around the distrubutor. ran the truck at night looking for the grounding but nothing. Please help!!
Thanks for anything!!!
Thanks for anything!!!
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