Opel Utility rev problem on cold start

Got a bigger spark plug wrench. Will wait for the engine to cool down before I try and remove the plugs to take a look.
 
Wolfeh said:
Hello





Now there is a problem that the above did not resolve.

On a cold start the engine idles fine(a bit high 1000rpm instead of the usual 800). The idling is a bit rough. If I depress the accelerator the revs drop. If I persist the car dies.
Click to expand...
I had a problem similar to this in the morning, made me wonder if what I found was not your problem all along.

On the the throttle body there are a couple of vacuum pipes connected, one from the map sensor and I think one from the valve cover, if you run your hand underneath the throttle body there is another vacuum outlet or nipple if you will, this one is not connected to anything and has a rubber stopper.

Over time it looks like this stopper perishes like all the other pipes and causes a vacuum leak, which is what I found. When idling the car would die when I press the accelerator and someone told me it could be an air leak after the air flow meter, I have since made a temporary solution to it and the problem has disappeared.

It could be different on your car since it's the bakkie but I thought it is worth a mention, do check it out.
 
Sorry for the thread hijack but since I have bumped it, while fiddling around I have discovered some other issue, it doesn't seem to affect the running of the car though so I have no idea what to make of it, it's some vacuum pipe as well, does anyone know where it connects to?

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TheChamp said:
I had a problem similar to this in the morning, made me wonder if what I found was not your problem all along.

On the the throttle body there are a couple of vacuum pipes connected, one from the map sensor and I think one from the valve cover, if you run your hand underneath the throttle body there is another vacuum outlet or nipple if you will, this one is not connected to anything and has a rubber stopper.

Over time it looks like this stopper perishes like all the other pipes and causes a vacuum leak, which is what I found. When idling the car would die when I press the accelerator and someone told me it could be an air leak after the air flow meter, I have since made a temporary solution to it and the problem has disappeared.

It could be different on your car since it's the bakkie but I thought it is worth a mention, do check it out.
Click to expand...
Interesting. I will look into it tomorrow. I have yet to resolve the problem.

It has since been to another mechanic who was convinced the problem was the fuel pump. Replaced that, no joy.
 
TheChamp said:
I had a problem similar to this in the morning, made me wonder if what I found was not your problem all along.

On the the throttle body there are a couple of vacuum pipes connected, one from the map sensor and I think one from the valve cover, if you run your hand underneath the throttle body there is another vacuum outlet or nipple if you will, this one is not connected to anything and has a rubber stopper.

Over time it looks like this stopper perishes like all the other pipes and causes a vacuum leak, which is what I found. When idling the car would die when I press the accelerator and someone told me it could be an air leak after the air flow meter, I have since made a temporary solution to it and the problem has disappeared.

It could be different on your car since it's the bakkie but I thought it is worth a mention, do check it out.
Click to expand...
I finally found the issue.

The earth wire in the TPS plug had become poorly connected/disconnected.

Due to the fiddling on the throttle body to find the stopper you were talking about I noticed the issue when brushing the wire/plug.

Thank you.
 
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