idle rpm changes - Ford Powerstroke Diesel Forum
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Old 10-13-2009, 05:22 PM
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idle rpm changes

hi. i have an 03 excursion with 104,??? miles on it. just had the egr and oil coolers replaced. everything has been fine since. but now sometimes sitting at long lights or in lines at drive throughs it will idle down to below 500 rpm and almost die then jump to almost 1000 rpm then back to normal. doesn't do it all the time just maybe a few times a week. any idea's on this one?
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Old 10-13-2009, 05:25 PM
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did it do that at all before
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Old 10-13-2009, 06:07 PM
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First..I'd like to say how do you get lucky enough for drive thrus to not tell you to turn your truck off? I swear if I'm going to taco bell, I have to turn off and restart my truck at least twice each time..3 times if they have a separate payment window.

2nd..I have a few theories, but I think this one is better for a tech to chime in on. I don't want you running around looking at things that could be perfectly fine, but could cause this problem so here's a
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Old 10-13-2009, 07:19 PM
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AIR IN FUEL
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Old 10-13-2009, 07:26 PM
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Originally Posted by Ozone-etr1 View Post
AIR IN FUEL
Doubt it .
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Old 10-13-2009, 07:39 PM
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mine did it,all i'm saying
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Old 10-13-2009, 09:40 PM
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mine did it,all i'm saying
Didn't mean to sound like an @$$. Everytime I had air in my lines the truck would barely run. Sounded horrible..
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Old 10-13-2009, 09:43 PM
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Originally Posted by GnFnRs View Post
hi. i have an 03 excursion with 104,??? miles on it. just had the egr and oil coolers replaced. everything has been fine since. but now sometimes sitting at long lights or in lines at drive throughs it will idle down to below 500 rpm and almost die then jump to almost 1000 rpm then back to normal. doesn't do it all the time just maybe a few times a week. any idea's on this one?
hmmm sounds alot like this^^^^^^^
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Old 10-14-2009, 07:52 AM
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it might only do it twice in a week.but then the next week it might do it at every stop light.for that day
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Old 12-28-2009, 07:28 PM
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I am very interested if anybody else has had this problem. It has been a recurring nightmare for me for several years on my 03 f350. 19 injectors, ficm, head gaskets, egr, icp, and a lot more stuff over the last 6 years. I have always tried to maintain this truck properly and yet I can't get the thing to idle right.
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