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Car idling too high 

 

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 Post subject: Car idling too high
Posted: Mon Oct 05, 2009 4:35 pm 
Getting Side Ways
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Ride: AU2 75th Anniversary Futura

Location: Adelaide
SA, Australia

Late last night after a long blast thru the hills, Im pushing the car pretty hard. Its cold outside I want to make the most of the cold weather. I noticed my car is idling WAY too high. I realise Im having to stomp on the brakes harder than usual. Kind of disconcerting.

I pull over and put the car into neutral, and tacho shoots up to 3000rpm and sits there, revving. I turn off the key, and let it sit for a little while and start up the car again. This time its revving to 1500rpm in park. What the...?

I take it easy getting home, park it in my driveway all the while the car is idling higher than normal, turn the car off, then turn the car on, and its still revving over 1200rpm, but this time I notice my temperature gauge not working, so I popped the bonnet, then all of a sudden...., the temp gauge works and the revs die down back to normal. Im sitting there scratching my head.

I grab the flash tuner and proceed to 'reflash' the ecu in an attempt to wipe the memory clean. I start the car up, and its improved, but still idles high. I leave it till the morning wondering what on earth started this up.

This morning, I decide to check the car by starting it up and seeing if there is any difference, seemed to idle ok. So I take the car for a drive. The high revving returns, but only to about 900-1000rpm in drive, and over 1200rpm in neutral.

I dont know what this is, could I have a faulty temperature sender in the header tank to my radiator? Is the TPS up the duff? Has anyone had this issue before?

 

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 Post subject: Re: Car idling too high
Posted: Mon Oct 05, 2009 4:49 pm 
Getting Side Ways
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Age: 28

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Ride: BA MKII Fairlane GHIA

Location: Berwick
VIC, Australia

my car is doing the exact same thing but due to there being so many mods i dont know where to start... its getting to the point where im gonna rip the motor and not drive the stupid fuking thing...

maybe try having a play with the idle screw
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 Post subject: Re: Car idling too high
Posted: Mon Oct 05, 2009 5:32 pm 
Getting Side Ways
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Age: 40

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Joined: 16th Dec 2008

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Ride: AU2 75th Anniversary Futura

Location: Adelaide
SA, Australia

I checked the vacuum line to the BOV. There is a tear in the 'T' piece connecting the vacuum line. I taped it up, and took the car for a quick run around the block. STILL no good.

I did notice however, that when I popped the bonnet, the idle went back to normal, which means that there is a line or some kind getting pinched or crushed when the bonnet gets closed.

Only after the car is accelerating under load does the high idle come in. Then ONLY when the bonnet is popped does the idle resume to normal revs.

 

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 Post subject: Re: Car idling too high
Posted: Mon Oct 05, 2009 6:56 pm 
Getting Side Ways
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Ride: Envi EF

Location: Grafton
NSW, Australia

Perhaps the accelerator cable is getting stuck? They do melt fairly easily.

 

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 Post subject: Re: Car idling too high
Posted: Mon Oct 05, 2009 7:32 pm 
Getting Side Ways
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Age: 40

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Joined: 16th Dec 2008

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Ride: AU2 75th Anniversary Futura

Location: Adelaide
SA, Australia

Ok, the problem I think is solved.

krisisdog was on the money. It seemed that whenever the bonnet was closed, the intake pipe was pushing down on the accelerator cable on top of the rocker cover, restricting the release of the accelerator while being pressed. Hence, the high revs.

I went to the shed, cut up an old ignition cable end that holds onto the spark plug, then wedged it in between the rocker and the intake pipe. Dodgy I know. But hey, it worked!!! No more sticking throttle, and the idle is back to normal. I took the car for a squirt, and a hard one at that to test it out.

But it does look dodgy. I'll leave it in there till my intercooler setup get built.

 

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 Post subject: Re: Car idling too high
Posted: Mon Oct 05, 2009 8:25 pm 
Getting Side Ways
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Age: 28

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Ride: Envi EF

Location: Grafton
NSW, Australia

Who cares if looks dodge for now, least it works :D

 

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 Post subject: Re: Car idling too high
Posted: Mon Oct 05, 2009 8:51 pm 
Getting Side Ways
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Age: 40

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Ride: AU2 75th Anniversary Futura

Location: Adelaide
SA, Australia

hell yeah, thats what I was thinking. Id rather this than have a stuck accelerator. :P

 

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