Discussion
Mine is back to 850 after I adjusted it. Its quite common for the tick over to drift out (mine always works its way down to 550-600 after a while). The adjustment is pretty easy - you just need a 8mm spanner and an allen key (3 or 4 mm, can't remember). Its easier if you have another person to sit in the car.
hobo said:
NeilB,
I spoke to dealership out this & they said it was not something I could do myself. They told me I needed to take car to a dealership, they would plug in a laptop & sort it out this way.
Would be interested to know how to do it myself.
Depends what they're talking about. I'm just talking about a quick fix (to stop the car from stalling when I'm getting it out of the garage). Plugging it into the laptop would mean they're probably going to investigate if there's an underlying problem causing the idle to fluctuate.
I was told by TVR Power (and a couple of other experienced TVR owners) that you should expect it to drift out a bit over continuous use (Its been 3000 miles since my last service so I figured its par for the course).
Edited to say : Hobo, just read your other post, leave it to the dealer if you've not even had the first service.
>> Edited by neil.b on Thursday 10th June 10:15
tick over is not a mechanical ajustment neilb, its done by setting a guideline within the ecu and the tiing is advanced/retarded automaticaly so to keep preset rpm. If your car is new the last setting will change as the engine losens, so this is why it needs to be taken to a dearlership, should only take them some minutes to do.
sacha said:
tick over is not a mechanical ajustment neilb, its done by setting a guideline within the ecu and the tiing is advanced/retarded automaticaly so to keep preset rpm. If your car is new the last setting will change as the engine losens, so this is why it needs to be taken to a dearlership, should only take them some minutes to do.
interesting....
last couple of times my car has been (for other things) and I've asked for the tickover to be tweaked, I watched them do it and there was no laptop involved, just adjustment of the grub screw on the throttle. I know this is just adjusting the amount of pressure on the throttle at rest, but wasn't aware there was more to it than that....
In cold weather my T350 ticks over roughly at an indicated 850-900rpm when the engine is cold; the same rpm but ticks over smoothly in warmer weather; but best of all it shows 750rpm but has a smooth tickover when the engine is warm. 
For 'smooth' read 'as smooth as a fire breathing beast gets'
For 'smooth' read 'as smooth as a fire breathing beast gets'
As I understand it the idle speed is adjusted for temperature by the ecu adjusting timing, it has no true cold start programme. The idle stop screw is mechanical and is adjusted as neil describes. Their is I beleive no harm in lifting the idle slightly with the screw as the engine detunes as it runs in.
The engine will go out of tune and get lumpy for both cam shim wear and the throttles going out of balence. out of balence throttles also lead to lumpy idle.
Hope that helps.
The engine will go out of tune and get lumpy for both cam shim wear and the throttles going out of balence. out of balence throttles also lead to lumpy idle.
Hope that helps.
neil.b said:
Mine is back to 850 after I adjusted it. Its quite common for the tick over to drift out (mine always works its way down to 550-600 after a while). The adjustment is pretty easy - you just need a 8mm spanner and an allen key (3 or 4 mm, can't remember). Its easier if you have another person to sit in the car.
Hi Neil, or anyone else in the know. whereabouts on the engine is the idle adjustment screw? my tickover is down to 600rpm and the engine has stalled a couple of times. i just want to make a temp fix before I take it into the dealer
cheers
rolex said:
Mine is back to 850 after I adjusted it. Its quite common for the tick over to drift out (mine always works its way down to 550-600 after a while). The adjustment is pretty easy - you just need a 8mm spanner and an allen key (3 or 4 mm, can't remember). Its easier if you have another person to sit in the car.
Hi Neil, or anyone else in the know. whereabouts on the engine is the idle adjustment screw? my tickover is down to 600rpm and the engine has stalled a couple of times. i just want to make a temp fix before I take it into the dealer
cheers
Easiest way to find it - open the bonnet, get someone else to sit in the car and rev the engine. You'll see the throttle cable moving (stand on the passenger side of the car). You should then be able to locate the screw - test it by pressing down on it. If the engine revs you've got it!
It has a locking nut. Undo, adjust with allen key and re-tighten. Be prepared to fiddle with it a bit. I found that you had to adjust it slightly under what you want it set to, as tightening the locking nut inevitably tightened the screw slightly.
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