| Author |
Message |
    
-bob- (Xavetarx)
| | Posted on Sunday, January 19, 2003 - 09:07 pm: | 
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I noticed while I was driving, the idle was high. When I stopped and put it in neurtal, the engine was idling around 1300 rpms. I couldn't get it to kick down (but I was fluttering it as if it were a carb!) When I turned it off, then back on, it idled fine. It's been really cold here of late (10 degree lows), so could this be messing with the computer?
-bob-
3.9 89 RRC |
Rob Davison (Pokerob)
| | Posted on Sunday, January 19, 2003 - 09:45 pm: |
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depending on what is going on, it could be acting as normal. this is a page out of my manual from my 1989...
the fluttering is a bit unusual though... might be the Idle Air Bypass Valve (stepper motor)
http://www.rangerovers.net/rremedies.htm#idle
rob |
Bill Ross (Billr)
| | Posted on Sunday, January 19, 2003 - 09:46 pm: |
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What about the possibility of the throttle plate getting iced, thus holding it open slightly. You stop the car, there is enough heat soak to melt the ice. Normal idle speed. There is no real manifold heat ducted to the intake tract and if the humdity is high, I would think that you have a probability of ice forming at the plate. My SAAB actually routes coolant around that area to prevent such an occurrence. |
Mark & Bev Preston (Markp)
| | Posted on Monday, January 20, 2003 - 10:19 am: |
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You don't say if your vehicle is warm or cold when you experience the high idle. Even if it was cold, 1300 sounds a little high. Getting back to normal idle by shutting the engine down and restarting makes me believe it's the idle air bypass valve. It is controlled by the ecu to allow a little more air by the plenum butterfly plate during idle at startup. Without a bypass around the butterfly, the engine would die. Could be your linkage hanging up. Try a little WD40 on the cable linkage. While its idling high try moving the linkage back to ensure its in the closed positioin. Also try pulling off the large rubber hose off the plenum and cleaning the butterfly with carb cleaner.
- Mark |
Ali
| | Posted on Monday, January 20, 2003 - 01:21 pm: |
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I'd clean out the stepper motor (Idle air control valve) then see if your problem goes away. My '91 with 145k miles behaves fine here in Chicago with freezing temps. |
-bob- (Xavetarx)
| | Posted on Monday, January 20, 2003 - 01:22 pm: |
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Actually, that was the first thing I did before shutting the engine down (checking the linkage). I cleaned the intake/butterfly with WD40 just a couple months ago actually. This symptom came about 10 minutes after first starting the truck (and driving 4 miles), so I'm assuming it was warmed up... the temp gauge read where it is when it is normally "warmed up". I also cleaned the stepper moter this past summer. I've put less than 1000 miles on it since. Just to clearify, the engine wasn't fluttering, I was fluttering the throttle to try and get it to kick down (as with a carb engine, because I'm use to those!). It actually did it again today, but this was right after start up. When I got to my destination (5 miles) the engine idled normally.
*sigh* welcome to the world of Rovers, right?! |
Craig Alexander (Craig89rr)
| | Posted on Thursday, January 23, 2003 - 03:02 pm: |
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hey bob... a very little talked about item that causes this is the baseplate pickup module... i had the same thing on my 89 and you CANT believe the difference. but there are several things that can cause it. chnaging the pickup on mine was like the fountain of youth. Craig89RR |
Rob Davison (Pokerob)
| | Posted on Thursday, January 23, 2003 - 06:36 pm: |
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lol... Craig, that base plate was your holy grail...
rd |
-bob- (Xavetarx)
| | Posted on Saturday, January 25, 2003 - 01:42 pm: |
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Just priced a new base plate pikcup at $100 (not including tax/shipping). Is this sounding reasonable? (I think I'll look at mine however when the temperature goes ABOVE freazing though!)
Thanks,
-bob- |
Rob Davison (Pokerob)
| | Posted on Saturday, January 25, 2003 - 05:43 pm: |
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http://www.dap-inc.com/
click on the rover parts to the left, then on the Range Rover picture, then ELECTRICAL
they have the base plate listed at $46
i wouldn't just start replacing stuff though, i had the same symptoms you had and it was my amplifier module that plugs into the base plate.
have you done any tests yet?
rob |
-bob- (Xavetarx)
| | Posted on Sunday, January 26, 2003 - 10:33 pm: |
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No tests yet. But now, it also had an irratic idle. It would pulse, high, then normal.. high then normal at about one second intervals. This was yesterday... Today, no abnormalities.
How should I test?
-bob- |
Rob Davison (Pokerob)
| | Posted on Monday, January 27, 2003 - 12:16 pm: |
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ok bob, sorry , i must have had you and someone else confused as i thought your car wasn't running./ now i reread the whole post and find it's just running poorly, sometimes.
i'd go with the base plate and check all your plug wires and maybe replace them.
i don't think the test procedure will shed any light as the problem is intermittent
rd |
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