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  #1  
Old 10-15-2010, 01:13 PM
shawhill shawhill is offline
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Default Random misfires when it snows

The engine runs perfectly in all conditions except when there are snowflakes in the air.
Doesnít matter if the outside temperature is warm or 20 below, drizzle, pouring rain, fog or dry, the engine cold or really warmed up, under load or coasting, high or low speed, but as soon as there are snowflakes in the air, the engine will randomly buck or skip. Like a hiccup which is felt all the way through the drivetrain. Never more than one skip at a time. Could be once every couple of miles or 10-15 times per mile. The thicker the snow, the more frequently it hiccups. No backfires.
Been to several dealers. No one has an idea of whatís causing the problem. I put in new plugs and wires at 50,000 m. even though it skips or misfires under no load. Obviously a more pronounced effect when under load, but itís still noticeable going downhill. The check engine light never comes on (yes it does work). One dealer put it on the computer and found nothing. Reflashed the memory just in case. Next day we had a major snow and almost didnít make the 4 miles to town and back.
In fact this has been going on for at least the last five winters. All regular maintenance has been performed on or ahead of schedule including air and fuel filters. No evidence of arcing around the coil or plug wires.
I canít find any sensor which would be exposed to snowflakes. Obviously it needs to be around 32 degrees or less outside, but even salt spray at 20 degrees is not a problem, only when flakes are in the air; fine/dry flakes or fat/wet flakes.
Iíd like to think of selling the truck in the near future, but that presents an ethical dilemma. I feel I would have to disclose the problem which could be a turnoff for buyers. And Iím not ready to move south. We like it up here in the north country.
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  #2  
Old 10-18-2010, 07:18 PM
cody93ranger cody93ranger is offline
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Default Re: Random misfires when it snows

sounds like the coil is getting wet, the same thing happened to my dads dodge so we had to waterproof the coil and it stopped miss firing.
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  #3  
Old 10-19-2010, 04:05 AM
crowdpleazer crowdpleazer is offline
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Default Re: Random misfires when it snows

i know it sounds stupid but check your battery cables both on the battery and on the other end of the cable. make sure they are tight and not very corroded. its just a thought....
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  #4  
Old 10-19-2010, 04:31 AM
modelageek modelageek is offline
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Default Re: Random misfires when it snows

Quote:
Originally Posted by shawhill View Post
The engine runs perfectly in all conditions except when there are snowflakes in the air.
Doesnít matter if the outside temperature is warm or 20 below, drizzle, pouring rain, fog or dry, the engine cold or really warmed up, under load or coasting, high or low speed, but as soon as there are snowflakes in the air, the engine will randomly buck or skip. Like a hiccup which is felt all the way through the drivetrain. Never more than one skip at a time. Could be once every couple of miles or 10-15 times per mile. The thicker the snow, the more frequently it hiccups. No backfires.
Been to several dealers. No one has an idea of whatís causing the problem. I put in new plugs and wires at 50,000 m. even though it skips or misfires under no load. Obviously a more pronounced effect when under load, but itís still noticeable going downhill. The check engine light never comes on (yes it does work). One dealer put it on the computer and found nothing. Reflashed the memory just in case. Next day we had a major snow and almost didnít make the 4 miles to town and back.
In fact this has been going on for at least the last five winters. All regular maintenance has been performed on or ahead of schedule including air and fuel filters. No evidence of arcing around the coil or plug wires.
I canít find any sensor which would be exposed to snowflakes. Obviously it needs to be around 32 degrees or less outside, but even salt spray at 20 degrees is not a problem, only when flakes are in the air; fine/dry flakes or fat/wet flakes.
Iíd like to think of selling the truck in the near future, but that presents an ethical dilemma. I feel I would have to disclose the problem which could be a turnoff for buyers. And Iím not ready to move south. We like it up here in the north country.
I remeber seeing a thread like this a few years ago. I think they figured it out but I cant remember. I am not sure what site it was on. I am on this sites as well as TRS and ford truck enthusiast/ the ranger and B series forum
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2004 Ranger, Ext Cab, 2WD, 3.0, 5 speed , 4WABS, crank windows, no cruise, Edge 116k.(6/5,2014) (SOLD).
1999 Ford Ranger, Reg Cab, 2.5, 5 speed, 2WD, no AC, 150k (SOLD).
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  #5  
Old 10-19-2010, 04:39 AM
ranger024x4 ranger024x4 is offline
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Default Re: Random misfires when it snows

my old 02 ranger did it too.

Do you happen to be in 4x4 when its 'skipping'
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  #6  
Old 10-19-2010, 04:51 AM
FireRanger FireRanger is offline
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Default Re: Random misfires when it snows

Does it only happen while in motion or does it do it while sitting parked in neutral as well? And as Chris said, if its only when in motion, is it by chance only when in 4wd?

If there is even a slight difference in tire size, even due to under inflation, this will happen. It is the drivetrained binding up and kicking.
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  #7  
Old 10-19-2010, 07:24 AM
shawhill shawhill is offline
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Default Re: Random misfires when it snows

All good thoughts and thanks for the replies.
The post several years ago might have been mine on a different Ranger forum. It got NO responses!
I'll waterproof the coil for good measure even though driving in the rain of all intensities is not a problem.
Both battery cables are good at both ends.
The problem happens in both 2WD and 4WD.
Don't know if it occurs while idling, i'm usually moving.
Problem occurred with my old tires and also with the new set put on in Oct. 2009. Always 4 of the same kind and regularly rotated.
Another "expert" thought the cause might be the Mass Air Flow sensor in need of cleaning. I just finished doing that with MAF cleaner, but won't know if it will solve the problem until the snow flies. There were no other signs of engine malfunction which would point to the MAF.
Still boggles the mind.
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  #8  
Old 10-19-2010, 07:59 AM
ranger024x4 ranger024x4 is offline
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Default Re: Random misfires when it snows

Its been almost 2 years since I had that truck, But i believe my problem only happened in 4wd. It was annoying! Id check ranger-forums search, because that site has been around for a while. Ill look under my username there because I think i commented on it there.
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  #9  
Old 10-19-2010, 08:27 AM
FireRanger FireRanger is offline
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Default Re: Random misfires when it snows

I doubt it's the MAF because the snow wouldn't have any effect on it, especially with the filter in place. The whole problem makes NO sense at all. I'm at a loss.
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How to: Aux light wiring, relays, & fuses
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  #10  
Old 10-19-2010, 09:23 AM
ranger024x4 ranger024x4 is offline
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Default Re: Random misfires when it snows

Quote:
Originally Posted by FireRanger View Post
I doubt it's the MAF because the snow wouldn't have any effect on it, especially with the filter in place. The whole problem makes NO sense at all. I'm at a loss.
this.

I could never figure it out. Mine only did it in 4wd, and with my add, i changed my tires/wheels every month or so and it did it with all sets.
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  #11  
Old 10-19-2010, 11:16 AM
modelageek modelageek is offline
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Default Re: Random misfires when it snows

Quote:
Originally Posted by shawhill View Post
All good thoughts and thanks for the replies.
The post several years ago might have been mine on a different Ranger forum. It got NO responses!
I'll waterproof the coil for good measure even though driving in the rain of all intensities is not a problem.
Both battery cables are good at both ends.
The problem happens in both 2WD and 4WD.
Don't know if it occurs while idling, i'm usually moving.
Problem occurred with my old tires and also with the new set put on in Oct. 2009. Always 4 of the same kind and regularly rotated.
Another "expert" thought the cause might be the Mass Air Flow sensor in need of cleaning. I just finished doing that with MAF cleaner, but won't know if it will solve the problem until the snow flies. There were no other signs of engine malfunction which would point to the MAF.
Still boggles the mind.
the thread that I am recalling had a bunch of responses. I also remember the guy had a fleet of the rangers and was swapping parts to see if he could solve it. I think I recall that his happened when it was idling also and only did it when it was snowing. if I find the thread I will link it here.
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2004 Ranger, Ext Cab, 2WD, 3.0, 5 speed , 4WABS, crank windows, no cruise, Edge 116k.(6/5,2014) (SOLD).
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  #12  
Old 10-19-2010, 11:50 AM
FireRanger FireRanger is offline
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Default Re: Random misfires when it snows

This pisses me off like you can't believe. I'm usually the king of logical troubleshooting, hell I draw flow charts if I can't picture a logical process in my head for this kind of thing. But I got nuthin. You have described every possible variable I could ever think to ask and how it doesn't effect it. And it's repetitive and repeatable so it wasn't a coincidence. There is nothing left but suggesting Johnny Five is a alive and wants to live in Florida. I'm at a total loss for this one and it is really irking me.
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How to: Aux light wiring, relays, & fuses
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  #13  
Old 10-20-2010, 04:11 AM
crowdpleazer crowdpleazer is offline
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Default Re: Random misfires when it snows

this just popped into my head as i was reading. have you checked the intake? i mean on top of the engine? and the injectors? make sure both are tight and there are no cracks in the intake. i dont know, this sounds like a very strange problem...
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new project: dirt track modified racing at the local saturday night track.
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  #14  
Old 10-20-2010, 02:15 PM
Solo V8 4G Solo V8 4G is offline
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Default Re: Random misfires when it snows

Check the wiper cowl and make sure no moisture is getting into your pcm also check all your connections when it skipping and do a "wiggle test" to all your wires leading to the pcm
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  #15  
Old 10-20-2010, 03:35 PM
FireRanger FireRanger is offline
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Default Re: Random misfires when it snows

None of that would be a snow only problem. In fact, snow makes moisture intrusion even less likely the case. Rain water and road spash will get into anything and everything. Snow flakes are big solid masses (compared to water droplets) and will actually resist going into places.
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How to: Aux light wiring, relays, & fuses
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Info: HID Projectors
How To: NO HEAT Troubleshooting Guide
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