Help.. Car all over the place after cleaning the VOD

[Admin-bloke]

http://www.k-jet.org/documents/greenbooks/200-series/

I've checked my notes. The thermistor looks correct. I've edited the posts to note this ( EDIT: )

I've added the resistance vs temp graph from the Volvo Green books from k-jet.org. refer to the top graph. ..

[flux3d]

Hi both, some good ideas there. Unplugging the idle speed motor had zero effect on the idle speed, so maybe that has a problem. If you remember Nick I had the opposite problem last year where, when cold you had to keep your foot on the throttle or it would die.Turned out to be the ecu then and I re-built it with all new IC's and transistors. That solved the problem right out that time. Maybe it didn't like the engine being touched, but it would seem odd for that to go pop.

I took the car out for a drive to see what it was like with the high idle. Nightmare is the word! It wants to be at 2000 rpm min all the time, so keeping it under the speed limit is a chore. It is possible to drive though, but not a good idea in slow traffic. On top of everything the speedo has now stopped working! These @#&$ing cars! One getting back home the idle was at 3000 rpm instead!

The above being the case I'm wondering if the butterfly valve isn't closing all the way. I did take part of it out to recondition. Maybe the deceleration springs are sticking open as well?

Some good points as well Mark. Although as I'm moving on Tuesday I can see myself having "just another look" tomorrow. Failing that I may be bringing it up to you Nick for a tech session.

Watching For the Love of Cars has put a smile on my face. I will sort it I'm sure. The cars is just protesting for some reason.

[flux3d]

All sorted! well, the speedo still needs work, but the car is now idling perfectly. All it was in the end is a sticking spring on the butterfly assembly. I can't believe how simple it was. I woke up this morning and realised that is the revs stayed high even when not at idle it had to be the throttle assembly which was at fault. Simple. Quick adjustment and grease and it was back to a smooth idle. In fact it seems smoother than ever!

Now I just need to fix that speedo, oh and maybe the valve clearance on cylinder one. Still seems to clatter too much when warm. Fine when cold. Plus the large fuel line bolt on the right side seems to be slightly weeping fuel. New copper washers needed! Will it ever end....

Thanks everyone for there input. I've learned a lot.

[RobvdVeer]

i'm so happy for you the issue is fixed now. i remember Sherlock Holmes: "when all other possibilities have proven to be false, the last one, improbable as it may seem, must be the truth".

easy on the torque when tightening that fuel bolt. they snap so easily!

[A Van]

This fault sounds right up Admins street