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4.0L OHV & SOHC V6 Tech General discussion of 4.0L OHV and SOHC V6 Ford Ranger engines.

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Old 02-02-2008
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engine cuts out

hey there first post. i searched around and found nothing relavent to my problem.

i have an 03 ranger super cab with the 4.0 in it.

i dont put many miles on it but its cold as hell where i live. (traveling between utah and idaho border ALOT).

it seems to do it when the headlights windshield wipers and music is on pretty loud. i have 2 subs that probably take a bit of electricity so maybe its something electrical... anyways... heres the symptom

the engine just cuts out and then kicks back on. it is for like a second then comes back on. so if i've got the RMP's up above like 2500 its really unpleasent. it rocks the truck pretty hard. i seem to notice it more when i'm shifting from 3rd to 4th (i have a manual 5spd transmision) but maybe its because i dont notice it with lower RPM's in 5th and 4th.

any advice on how to start troubleshooting this would be much appreciated. i've had it for over a year and have had no problems with it. absolutely None! so i wanna keep it, i think its a good little truck.


i've also watched the gauges to see if they bounce when it happens and the headlights to see if they flicker when it happens but they dont.
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Old 02-02-2008
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I've personally had this happen on two different cars. One was a loose aftermarket chip plugged into the PCM. The other was a stock 03 mountianeer that had water getting into the engine room fuse box. That one was hard to figure out because it only did it every once in a while. I just analized what was going on when it haoppened.. the only common thread was fog / rain / snow. Sure enough when I figured it out we found water was causing it.

Neither of those threw a CEL by the way.


Rich
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Old 02-06-2008
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yeah i'll have to check the fuse box thing out. it does it every once in a while (like when its snowing). i dont beleive the truck has a chip in it. thanks for the info i appreciate it.
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Old 02-06-2008
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Crawl underneath the truck where the driver's seat is, There is a square wire plug held in with a bolt. Remove it and clean the terminals with contact cleaner and then apply a coating of dielectric grease. It is a common place for water to get in and cause problems.
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