Engine Stalling??
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Postmaster
Joined: Jan 2004
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From: Kearney, Nebr
Engine Stalling??
I noticed yesterday driving home in my 4.9L that is started to have a slight miss under load. As I approached home it started to get a little worse but made it. I went to start it this morning and it started pretty hard but it fired and ran smooth, but when I went to leave for work it was cutting out again.
I noticed the engine compartment was full of snow and figured the wires or coil wire was shorting out. I figured it just needs to be thawed so I tried to limp it to the heated shop a few hours later, which half way there is started cutting out again and would not fire under load.
Does this sound like a coil problem? Wires? Distributor?
I’ve noticed that she will sometimes miss during a rain or foggy morning, but she always worked it’s way out of it.
Any ideas? I have it facing the south and hopefully the sun will thaw it out a bit.
1990 F150 4.9L 2wd 5-speed
I noticed the engine compartment was full of snow and figured the wires or coil wire was shorting out. I figured it just needs to be thawed so I tried to limp it to the heated shop a few hours later, which half way there is started cutting out again and would not fire under load.
Does this sound like a coil problem? Wires? Distributor?
I’ve noticed that she will sometimes miss during a rain or foggy morning, but she always worked it’s way out of it.
Any ideas? I have it facing the south and hopefully the sun will thaw it out a bit.
1990 F150 4.9L 2wd 5-speed
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Joined: Jul 2009
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From: Toledo, Ohio
Check your distributor caps. (both of you). We had towmotors where I used to work and in the warehouse when it was raining out it got humid or whatever inside and the towmotors would develop a miss. It was moisture in the cap.
Just an idea.
Just an idea.
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Postmaster
Joined: Jan 2004
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From: Kearney, Nebr
Can condensation form underneath the cap? I'm going to try and shine it back up with some emry cloth tonight and hopefully get it back to the shop.
I would think it's the cap or coil... Thinking that I'd have at least one cylinder fire though.
I would think it's the cap or coil... Thinking that I'd have at least one cylinder fire though.
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Joined: Jul 2009
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From: Toledo, Ohio
Wait, what? Yes condensation can form underneath the cap. It shouldnt, but it can.
Whats the last part though? <b>"Thinking that I'd have at least one cylinder fire though"</b> Do you have a miss, or a no run issue? I think you state both.
How is your throttle body? Try cleaning it. Ive also had that be an issue. When its cutting out, if you can, see if you have spark at the wires. If its more in depth maybe someone else can help cause I dont have all that knowledge. Good luck.
Whats the last part though? <b>"Thinking that I'd have at least one cylinder fire though"</b> Do you have a miss, or a no run issue? I think you state both.
How is your throttle body? Try cleaning it. Ive also had that be an issue. When its cutting out, if you can, see if you have spark at the wires. If its more in depth maybe someone else can help cause I dont have all that knowledge. Good luck.
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From: Kearney, Nebr
I’m having both issues.
It will start and run fine, but once you start to put a load on the engine it will start to cut out. This morning it idled for maybe 15 minutes and it eventually started missing at idle before I shut it off.
Once you shut it off when it’s missing it will not want to crank back up.
I’ve played with the coil wire and the rest of the electrical connections around the coil and dist. I would think at least one cylinder would fire when it’s in one of these no start modes? It seems like there is no spark getting to the dist.
Does that make any sense? I’m not too familiar with gasoline engines. This old truck as probably been the most reliable pickup I’ve ever had.
It will start and run fine, but once you start to put a load on the engine it will start to cut out. This morning it idled for maybe 15 minutes and it eventually started missing at idle before I shut it off.
Once you shut it off when it’s missing it will not want to crank back up.
I’ve played with the coil wire and the rest of the electrical connections around the coil and dist. I would think at least one cylinder would fire when it’s in one of these no start modes? It seems like there is no spark getting to the dist.
Does that make any sense? I’m not too familiar with gasoline engines. This old truck as probably been the most reliable pickup I’ve ever had.
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From: Toledo, Ohio
Well, ill tell you this.
Check and see if you have spark coming from the coil from that little plug wire that goes to the center of the cap. (im not being sarcastic you just said you didnt know gasoline engines well).
If you do, pull your cap and check it to see if you can clean up the contacts with some emory cloth or a file or something and use a cloth to clean it up and dry it out (make sure its clean before putting it back on, you dont want that crap in your distributor).
See if that helps.
Check and see if you have spark coming from the coil from that little plug wire that goes to the center of the cap. (im not being sarcastic you just said you didnt know gasoline engines well).
If you do, pull your cap and check it to see if you can clean up the contacts with some emory cloth or a file or something and use a cloth to clean it up and dry it out (make sure its clean before putting it back on, you dont want that crap in your distributor).
See if that helps.
Thread Starter
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Postmaster
Joined: Jan 2004
Posts: 3,207
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From: Kearney, Nebr
Well, ill tell you this.
Check and see if you have spark coming from the coil from that little plug wire that goes to the center of the cap. (im not being sarcastic you just said you didnt know gasoline engines well).
If you do, pull your cap and check it to see if you can clean up the contacts with some emory cloth or a file or something and use a cloth to clean it up and dry it out (make sure its clean before putting it back on, you dont want that crap in your distributor).
See if that helps.
Check and see if you have spark coming from the coil from that little plug wire that goes to the center of the cap. (im not being sarcastic you just said you didnt know gasoline engines well).
If you do, pull your cap and check it to see if you can clean up the contacts with some emory cloth or a file or something and use a cloth to clean it up and dry it out (make sure its clean before putting it back on, you dont want that crap in your distributor).
See if that helps.
Thanks for the help.