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  #1  
Old 12-08-2005
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RMPs weird at idle...??

I thought I saw a thread about this not too long ago and I already tried to find it w/no success.

My truck has been acting funky the last few weeks (or at least thats when I started to notice it). When Im sitting at a stand still, my truck (and this is the best way I can describe it) feels like when you are sitting on a horse and its all excited to go but you dont want it to...like its jumpy. At the same time the RPMs jitter at around 500 or so (this is after it settles down from 1000).

Any ideas what might be causing the problems?
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Old 12-08-2005
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did you check the blinker fluid? thats all i can think of right now
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  #3  
Old 12-08-2005
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Quote:
Originally Posted by Alon
did you check the blinker fluid? thats all i can think of right now




























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  #4  
Old 12-08-2005
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Yeah those RMP'S don't know, Let me get on my horse and see what i can figure out. IDK maybe a timming issue, did you do anything to it recently? Any work on it or and problems ie drive through a lake?
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Old 12-08-2005
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Originally Posted by rangerxlt06
Yeah those RMP'S don't know, Let me get on my horse and see what i can figure out. IDK maybe a timming issue, did you do anything to it recently? Any work on it or and problems ie drive through a lake?


I went through a mud puddle a few times like a month and a half ago...but it just started doing this a few weeks ago...?
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  #6  
Old 12-08-2005
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Sounds like a bad IAC
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  #7  
Old 12-08-2005
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Disconnect your battery for a half hour. My friend Cheryl is had teh same issue with her exploder. I hooked my digimoto unit up to it.. no codes, mappes the rpm's.. They were dropping down to 470 and racing back up to around 1100.. then dropping... after letting her truck sit/run for 5 minutes, the problem would go away.. till she re-started the vehical.

Its been about a week ( since this past saturday ) and the problem hasn't come back yet.

D.
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  #8  
Old 12-08-2005
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Well it only seems to do this sometimes...like today on my way to class it was fine sitting still for a few min b4 it started to act up.
When I took my truck into the dealership a while ago they said that I needed to get my fuel filter changed (which I didnt have them do) so would this cause a problem? Maybe its running too rich?
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Old 12-08-2005
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fuel filter you shouldnt need one. if anything an idle air sensor
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  #10  
Old 12-08-2005
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How long has it been doing this? Is the CEL on? Does it make any sounds when it happens(anything that isn't a normal engine sound? Does it only happen at certain temps(engine or environment)?

Your problem sounds similar to one I'm having. I think I've almost narrowed the problem down, but not 100% sure yet.

I doubt it's the IAC - when mine went bad, I knew something was going bad - it made a loud whining noise and it sounded like something sucking into a vacuum.

The "stumble" your describing mine has been doing for a few weeks. It only does it when I first crank it and its cold though. After it warms up to normal operating temps, it's fine. But I'm thinking mine is low fuel pressure.
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  #11  
Old 12-08-2005
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dude i have the same prob, but mine is always at 500 to 600 rpm when idling
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  #12  
Old 12-08-2005
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Quote:
Originally Posted by telemaster1952
dude i have the same prob, but mine is always at 500 to 600 rpm when idling
not a dude......bailey is a she.... look at my avatar....

anyways, mine was doin that on and off. it will go away for a while then come back. i say try cleaning the mass air sensor and unplug the battery and let it all reset...........

or you can just wait till i come home and i'll do it for ya
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  #13  
Old 12-08-2005
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^^^ thanx for clearing that up...I am indeed a she


The mass air sensor should be fine, it was replaced not too long ago...unless it got extremly dirty recently...which probably isnt too far off

it dosnt make any other odd noises then the ones it always does...the timming chain rattles...but thats about it
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  #14  
Old 12-08-2005
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mass air flow and/or IAC. leaning towards MAF, ur is doing what sarahs is doing and my moms xplder was doing.

take it to the dealer or u can try cleaning it with electrical cleaner for a temporary fix.
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  #15  
Old 12-08-2005
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Bailey!!
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  #16  
Old 12-08-2005
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Get under your truck and try to locate your cv boot, Most likely it's worn out it was worn on mine when I had this problem. Head to autozone and ask for the cv boot repair tape that they offer. That should fix your problem.
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  #17  
Old 12-10-2005
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Quote:
Originally Posted by Swoop1156
Bailey!!

Swoopie!!!

Quote:
Originally Posted by FauX
Get under your truck and try to locate your cv boot, Most likely it's worn out it was worn on mine when I had this problem. Head to autozone and ask for the cv boot repair tape that they offer. That should fix your problem.
um...riiiiiiiiiiight
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  #18  
Old 12-10-2005
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Hose the dirt off your engine... I have yet to figure it out, but mine does the same thing from time to time, washing the engine makes it go away.. lol.. I'm pretty sure mines posesed so I'm not sure if it will help you or not but hey, worth a shot.. and another lol..
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  #19  
Old 12-10-2005
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^^^Can you just spray in there or do you have to cover the coil pack up or anything else?
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  #20  
Old 12-11-2005
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I usually just spray in there
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  #21  
Old 12-11-2005
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I had the same problem with mine a few weeks ago.
The rpm's would go so low that my truck would even stall sometimes.

I cleaned out the MAF and IAC sensor's and disconnected the battery and everything seems to fine so far.
I would reccomend doing that.
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  #22  
Old 12-11-2005
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Have to agree.....

with Rangererv.....
Since your problems started a while after going thru the mud puddle.... there is a good chance some dirty moisture could have been pulled thru the air filter and deposited on the MAF filaments and inside the IAC between the solenoid disc and seat.
Remove the MAF sensor and spray the filaments with throttle body cleaner; then remove and clean the IAC solenoid disc and seat. Since the MAF filaments provide the ECM with air flow information for adjusting air/fuel ratio and the IAC opens and closes to regulate engine idle... either can cause problems with engine operation.
Recently I removed the MAF while cleaning the K&N conical air filter; even though the filaments looked clean... I sprayed throttlebody cleaner on them anyways.... Since then..... the mileage per 1/4 tank appears to have increased. Will know more once I need to fill up.....

OR 4x4
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  #23  
Old 12-30-2005
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My 03 has this problem...when at idle, when the ac compressor kicks on the idle will drop down to like 500 then jump back up to 750 or whatever is normal, if in park, the truck shakes when it does it, but in drive at a red light or just sittin there, it will jump......i was going to take it to ford, but i think i might try to clean up the MAF and the IAC and see what i can find out...im going to find the "how to" for those 2....but does it do with when your heaters on ?? thats the ONLY time mine does it, if the heater is off it doesnt do it at all...

Rocky
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  #24  
Old 01-10-2006
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when i started reading this i pretty much new it was the mass air flow. hey do you happen to have a K&N air filter?
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