I have been looking for a solution to this on the net but I am having no joy. Hopefully someone here can help me out.
I have a 2004 330Cd. I have done a good bit of work to the car but I am suffering turbo issues and idle problems.
Firstly the Idle;
It only happens when idling. And it has done it once today and once a week ago. The engine can be cold or warm, doesnt seem to make a difference. I will come to a stop and the engine will revv between 750rpm to 800rpm twice every second. If I move up in the line of traffic to engine works fine and starts to do this little revv again when I come to a stop.
The second problem is the turbo. And this is really annoying.
It does not seem to work at all in 1st gear. If I go to 3500-4000rpm and change to second I will have no power at all (turbo will not kick in). And this will happen all the way to 3rd and 4th gear. However if I take my foot off the trottle and let the engine relax and go foot to the floor I got full boost.
For example, If I come out of a corner onto a main road and let the engine go over 2500k I will need to change into 2nd, take my foot off the trottle fully and then go back on fully to get boost. It feels as though the turbo acuator will not open unless the car is under 1500-2000 revvs.
I can have the same problem driving at 30mph. I might be in 4th gear doing 1500rpm, I will go for an overtake and I will have no boost. But if I release the trottle and go back on it I have boost?
The ECU has no codes. The only issue is with one of the active sensors. The "fuel system monitoring" sensor is red (should be green) but when I put 3ltrs of petrol into a full tank of diesel (wanted to clean her out for NCT) and had the EGR disconnected I had not revv problem, less boost isseus and the sensor showed green.
I had the EGR checked and it is worling fine.
As you can see I dont know where to look.
I am getting the fuel filter changed this weekend incase it is half blocked. Could it be a MAF, HPFP, turbo arm getting stuck, EGR not closing fully?
Your ideas would be greatly appricicated.
The work I have done to the car can be seen here incase I have already covered some of your ideas
James's 2004 E46 330Cd - BMW-Driver.net Forums
Thanks
Edit/Delete Message
I have a 2004 330Cd. I have done a good bit of work to the car but I am suffering turbo issues and idle problems.
Firstly the Idle;
It only happens when idling. And it has done it once today and once a week ago. The engine can be cold or warm, doesnt seem to make a difference. I will come to a stop and the engine will revv between 750rpm to 800rpm twice every second. If I move up in the line of traffic to engine works fine and starts to do this little revv again when I come to a stop.
The second problem is the turbo. And this is really annoying.
It does not seem to work at all in 1st gear. If I go to 3500-4000rpm and change to second I will have no power at all (turbo will not kick in). And this will happen all the way to 3rd and 4th gear. However if I take my foot off the trottle and let the engine relax and go foot to the floor I got full boost.
For example, If I come out of a corner onto a main road and let the engine go over 2500k I will need to change into 2nd, take my foot off the trottle fully and then go back on fully to get boost. It feels as though the turbo acuator will not open unless the car is under 1500-2000 revvs.
I can have the same problem driving at 30mph. I might be in 4th gear doing 1500rpm, I will go for an overtake and I will have no boost. But if I release the trottle and go back on it I have boost?
The ECU has no codes. The only issue is with one of the active sensors. The "fuel system monitoring" sensor is red (should be green) but when I put 3ltrs of petrol into a full tank of diesel (wanted to clean her out for NCT) and had the EGR disconnected I had not revv problem, less boost isseus and the sensor showed green.
I had the EGR checked and it is worling fine.
As you can see I dont know where to look.
I am getting the fuel filter changed this weekend incase it is half blocked. Could it be a MAF, HPFP, turbo arm getting stuck, EGR not closing fully?
Your ideas would be greatly appricicated.
The work I have done to the car can be seen here incase I have already covered some of your ideas
James's 2004 E46 330Cd - BMW-Driver.net Forums
Thanks
Edit/Delete Message