Bongo Fury

As mentioned previously I still have this problem,the immobilser has been disconected apart from working on something i am told could not possibly afect this, and Adam at ADS says the vacuum pipes are ok. The immobiliser man say faulty temperature sensor,can anyone advise me please.Thanks

Hi what is the idle speed when you first start the engine?
Check the fast idle lever retards when off.
Try to reset the system by disconnecting the battery for a couple of minutes.
This might help, but again might not but worth a try.
2000rpm =about 40 mpg thats a lot.

Cheers Mal..

750 rpm on start up till well warmed up, it does the 2000 rpm when its in neutral or parked.Sorry perhaps I should have mentioned this earlier.

Beatsystem wrote:750 rpm on start up till well warmed up, it does the 2000 rpm when its in neutral or parked.Sorry perhaps I should have mentioned this earlier.

Ok, it could also be the throttle cable sticking,if it happens after depressing the accelerator pedal.
You will have to physically check this on the injector pump lever.

Mal..

i dont think it the cable sticking you can be sat there and it will go up to 2000 then drop back sometimes then go up again whilst you do nothing.I thinks its some sort of cold start sensor it seems to kick in quite markedly once its warmed up.

Beatsystem wrote:i dont think it the cable sticking you can be sat there and it will go up to 2000 then drop back sometimes then go up again whilst you do nothing.I thinks its some sort of cold start sensor it seems to kick in quite markedly once its warmed up.

Aye you a probably correct there.As I said you will have to watch the lever on top of the pump,to make sure that it does not advance when the engine revs up.If it does not, you probably have a internal injector pump fault,2000 revs seems a bit high for a vacuum problem.
As I said you will have to have a look at the throttle control lever etc,and disconnect the battery for a short period to reset the system.There are also various other checks you can make to the engine sensors but you require the data for that. I am presuming that the vehicle is Diesel.You have not put in Petrol by mistake.

Cheers Mal..

What year is yours beat? Post '99 use a fly by wire pump which is ECU controlled .

its a 1996 N reg . This is becoming a real drag now,happens everytime. Something switches in or out and up it goes. Have disconnected battery as suggested previously made no difference.Any more ideas please?
Thanks Derek

I have just been watching the engine when its warmed up an actuator on the side of the engine near the throttle kicks in and pushes on the linkage which then raise the tickover speed. This is a sudden and definate movement. I hope that is helpful.When i first turn on the ignition the actuator kicks in it then lets go and only comes back in when the temp has risen. The fan also starts up straight away although by now the engine is warmed up after only being turn on and off for a few minutes?

The actuator on the pump is controlled by vacuum and one of the 2 vacuum relays (The one nearest to the front of the engine) controls that. I think the engine temp sendor controls that via the ECU. The other relay controls the EGR system.

I wonder if someone has tried to disable the EGR system and plugged the pipe to the wrong relay??

Disconnect the vac pipe to the pump actuator, plug it with a rivit/bolt or similar and see if the problem goes away.
The only problem then will be the idle speed doesn't rise at startup or when the a/c is switched on.

The actuator should only increase the revs to around 1200 rpm - you can adjust the body of the actuator by screwing it.

Hi
Thanks, just for clarity do i plug the end of the pipe or the end of the actuator? Pipe I would have though, just checking. I think there are two pipes to the actuator?

Hi,

I have exactly the same problem, and was wondering if you had managed to cure it.

Our Bongo will intermittently rise up to 2000rpm when put into Neutral or Park and stay there. Originally it would only hold there for a short while before returning to normal revs, but more recently it seems to stay there until you either put it into gear, or switch off the engine.

I had thought I had found a correlation between this issue happening in that it appeared to only ramp up for short periods whilst one of the fans started up. This may have been the case, but it appears to happen independently of this now, and like I say, it stays at 2000rpm.

Any help much appreciated.

Cheers,

Ian K.

check the front two vacuum solenoids, electrical connections & vacuum pipes & fittings on the side of the engine above the glow plugs under the drivers seat. these control the idle speed, the front one increases the idle speed when the ac kicks in & puts more load on, I think the one behind controls the idle speed on start up.
The front solenoid on mine was doing nothing when voltage applied across it, so I swapped it for one of my redundant egr solenoids (egr removed completely) job sorted. Be very careful with the little plastic fittings on the solenoids though as they are very fragile & brittle.

Hi,

I need to source a new one of these solenoids. Anyone know who can supply and what it is actually known as. The part number details on mine are K5T49091 KL01 6610

TIA