Fixing rough idle on a 2500cc V-6: finally fixed!

trevd01 · Post by **trevd01** » Mon Mar 19, 2007 6:32 pm

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.

dandywarhol · Post by **dandywarhol** » Tue Mar 20, 2007 12:05 am

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...........

mikeonb4c · Post by **mikeonb4c** » Tue Mar 20, 2007 12:47 am

Dandy - Is that a thumbs down for this bit of jerry mechanics then

francophile1947 · Post by **francophile1947** » Tue Mar 20, 2007 11:53 am

I reckon so Mike - it does nothing to cure the actual fault, just masks it.

mikeonb4c · Post by **mikeonb4c** » Tue Mar 20, 2007 12:25 pm

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

francophile1947 · Post by **francophile1947** » Tue Mar 20, 2007 12:52 pm

Yes Mike, but that was in the carburettor days. Shouldn't be necessary in today's computer controlled engines.

mikeonb4c · Post by **mikeonb4c** » Tue Mar 20, 2007 2:04 pm

Crikey, what planet have I been on these last 30 years

dandywarhol · Post by **dandywarhol** » Tue Mar 20, 2007 3:49 pm

mikeonb4c wrote:Crikey, what planet have I been on these last 30 years

.......a question I often wonder the answer to Mike

twinrider · Post by **twinrider** » Fri Jul 24, 2009 2:42 am

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!

Post by **Doone** » Fri Jul 24, 2009 9:17 am

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

).

twinrider · Post by **twinrider** » Fri Jul 24, 2009 10:12 am

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.

Fixing rough idle on a 2500cc V-6: finally fixed!

Fixing rough idle on a 2500cc V-6: finally fixed!

Re: Fixing rough idle on a 2500cc V-6: finally fixed!

Re: Fixing rough idle on a 2500cc V-6: finally fixed!