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  #1  
Old 02-18-2010, 06:33 AM
normandg normandg is offline
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Unhappy Idle Drop
I have a minor problem with my Ranger (2003, FX4, 4.0). I can start the engine just fine. It drives with no problem. It even idle's fine while sitting at a stop light. HOWEVER, when I move the transmission from Drive to Park (or netural) the engine RPM will drop by about 500. There have been a few occassions where I was backing up and while turning the wheel and moving from Drive to Reverse the engine stalled. I replaced the wires and plugs (yes with Ford parts). Still, the problem persists.

Any recommendations would be greatly appreciated.

Norman
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  #2  
Old 02-20-2010, 05:31 AM
nitro nitro is offline
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try cleaning IAC (idle air control) valve
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92 Ranger XLT
Fordstrokers 347 TFS 205 cnc track heat heads
Parker Funnel Web intake, Pro-system 780 carb, full MSD ignition, headman headers
TCI 3500 stall converter, AOD built (inhouse) with TCI kit, 8.8 out of 04 Ranger
(inhouse)=in the house on the kitchen table
http://www.youtube.com/watch?v=DhuJE04Up8Q
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  #3  
Old 02-22-2010, 09:56 PM
ajstoner21 ajstoner21 is offline
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Default have a check engine light?
Not sure if its quite the same problem, but my Ranger was having a large variation idling. It would be idling at 1500 at one light, and drop to 400 rpm the next signal light. My check engine light was also on though and turned out to be a huge leak in my intake manifold.

I tried replacing fuel filter and air filter as some easy fixes (check engine light originally said banks 1 and 2 running lean) but they didnt work.
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  #4  
Old 02-23-2010, 04:29 PM
nitro nitro is offline
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ajstoner21
air & fuel filter want fix it need to replace the intake gaskets mine wear $16 took 3.5 hours to replace.
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92 Ranger XLT
Fordstrokers 347 TFS 205 cnc track heat heads
Parker Funnel Web intake, Pro-system 780 carb, full MSD ignition, headman headers
TCI 3500 stall converter, AOD built (inhouse) with TCI kit, 8.8 out of 04 Ranger
(inhouse)=in the house on the kitchen table
http://www.youtube.com/watch?v=DhuJE04Up8Q
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  #5  
Old 02-24-2010, 06:04 AM
normandg normandg is offline
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Thanks everyone for your input. The fix was replacing the Idle Air Control. I went by the dealer and picked one up. It took only a few minutes to pull the old one off and install the new one. Sure enough that resolved the issue.

Norman
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  #6  
Old 02-24-2010, 06:06 AM
SCRATCHBGONE SCRATCHBGONE is offline
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IAC plays a big roll in idle make sure clean along with intake and tpc
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97 ford ranger splash 4.0,superchip,cold air intake,jacobs ignition,jba shorty headers,centerforce clutch,flowmaster true dual....... total custom shaved everything with straight bed added an 03 frontend
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  #7  
Old 02-24-2010, 06:59 PM
ajstoner21 ajstoner21 is offline
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Yeah, I got new intake gaskets installed. Runnin good now. Still idles high untill till it seems to be warmed up ( maybe 1300). Not sure if thats normal or not, but, no more check engine light.

Thanks for responding!
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  #8  
Old 02-24-2010, 07:49 PM
nitro nitro is offline
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Quote:
Originally Posted by ajstoner21 View Post
Yeah, I got new intake gaskets installed. Runnin good now. Still idles high untill till it seems to be warmed up ( maybe 1300). Not sure if thats normal or not, but, no more check engine light.

Thanks for responding!
have you cleaned the IAC & throttle body my high idle was from the old man i got mine from had a lot of build up around the butterfly in the throttle body he didn't clean it he just cranked on the idle screw
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92 Ranger XLT
Fordstrokers 347 TFS 205 cnc track heat heads
Parker Funnel Web intake, Pro-system 780 carb, full MSD ignition, headman headers
TCI 3500 stall converter, AOD built (inhouse) with TCI kit, 8.8 out of 04 Ranger
(inhouse)=in the house on the kitchen table
http://www.youtube.com/watch?v=DhuJE04Up8Q
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  #9  
Old 02-24-2010, 11:40 PM
ajstoner21 ajstoner21 is offline
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Not sure if the IAC has been cleaned, but the throttle body has been cleaned. Is a new IAC expensive? I might just replace it...
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  #10  
Old 02-25-2010, 12:30 AM
jester jester is offline
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Quote:
Originally Posted by ajstoner21 View Post
Not sure if the IAC has been cleaned, but the throttle body has been cleaned. Is a new IAC expensive? I might just replace it...
$65-70 At autozone and checker/oreilly's
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1993 Ford Ranger XLT, 4.0, auto, 4x4
No mods yet...
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