Hi. I have an E46 325i that is "idle-hunting" The idle goes up and down. I've replaced and checked alot of different things to fix this such as Vanos seals, DISA-valve, intake boots, ICV and some more parts, but I haven't been able to solve it.
Now I'm suspecting a bad fuel-pump. But what would the symptoms of this be and could it be my problem? I've been reading a bit online and what tells me this is NOT the problem is that it should be hard to start. Which my car is not, in fact it always starts really easy even in cold weather. Could it still be the bad fuel pump?
The engine seems to start idle-hunting when it is allowed to drop from high RPM and high load to a low RPM and low load(Clutch engaged at redlight for example). But also when idling fine and a little load is added such as when the headlights or AC is turned on and the generator puts a little load on the engine.
Any help would be greatly appreciated! Thanks
//Benjamin
Now I'm suspecting a bad fuel-pump. But what would the symptoms of this be and could it be my problem? I've been reading a bit online and what tells me this is NOT the problem is that it should be hard to start. Which my car is not, in fact it always starts really easy even in cold weather. Could it still be the bad fuel pump?
The engine seems to start idle-hunting when it is allowed to drop from high RPM and high load to a low RPM and low load(Clutch engaged at redlight for example). But also when idling fine and a little load is added such as when the headlights or AC is turned on and the generator puts a little load on the engine.
Any help would be greatly appreciated! Thanks
//Benjamin