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Posted: Mon Mar 19, 2007 6:32 pm
by trevd01
It definitely sounds like the idle control valve. In 'D' stopped with you foot on the brake there is some load on the engine that is not there when in 'P'. That could easily be enough to cause the problem you describe.
I cleaned the fuel injection system on my son's ancient Golf to solve a similar problem. I'd never touched a fuel injection system before, but it was easy. And it worked.
Posted: Tue Mar 20, 2007 12:05 am
by dandywarhol
mikeonb4c wrote:In the old fashioned world, you might try scewing up the tickover stop (oooh matron!) a tad as a get-you-by and if it doesnt leave the tickover too high in P and/or cause a lurch when you put it into D. Dont know what advice Dandy would give on that
Not a lot...........
Posted: Tue Mar 20, 2007 12:47 am
by mikeonb4c
Dandy - Is that a thumbs down for this bit of jerry mechanics then
Posted: Tue Mar 20, 2007 11:53 am
by francophile1947
I reckon so Mike - it does nothing to cure the actual fault, just masks it.
Posted: Tue Mar 20, 2007 12:25 pm
by mikeonb4c
I know dude, mind you on the old cars it was sometimes nothing more or less than a need to adjust the tickover per se
Posted: Tue Mar 20, 2007 12:52 pm
by francophile1947
Yes Mike, but that was in the carburettor days. Shouldn't be necessary in today's computer controlled engines.
Posted: Tue Mar 20, 2007 2:04 pm
by mikeonb4c
Crikey, what planet have I been on these last 30 years
Posted: Tue Mar 20, 2007 3:49 pm
by dandywarhol
mikeonb4c wrote:Crikey, what planet have I been on these last 30 years
.......a question I often wonder the answer to Mike
Fixing rough idle on a 2500cc V-6: finally fixed!
Posted: Fri Jul 24, 2009 2:42 am
by twinrider
A couple years back I posted about a rough idling problem in this now-locked thread.
http://www.igmaynard.co.uk/bongo/forum/ ... 43&start=0
Finally got the issue resolved. It turned out that one of the leads in the distributor cap was broken. A new distributor cap, a fresh set of spark plugs and she's running as good as new!
Re: Fixing rough idle on a 2500cc V-6: finally fixed!
Posted: Fri Jul 24, 2009 9:17 am
by Doone
Good news... that job took a while.
Without knowing the service history, it sounds like one of those jobs that you have to go through one step at a time until you have solved the problem. (We found the old thread via your link and merged it for you, so all the info is in one place now
).
Re: Fixing rough idle on a 2500cc V-6: finally fixed!
Posted: Fri Jul 24, 2009 10:12 am
by twinrider
It took so long to fix because I just kept procrastinating till the problem got too annoying to ignore. The solution came by asking my Mazda mechanic of all people
He recommended changing the spark plugs and at that time discovered the broken distributor cap!
Thanks for merging the thread.