BMW still not running well..... advise needed.

[Gammelhagger01]

Blue Oval84 said:

OP - to repeat what someone asked earlier, have you tried the Throttle Position Sensor?

You can test it yourself if you have a Bluetooth dongle to connect to the OBDII port.

Just fitted a new trottle body which include TPS..... better but not solved :-(

[Gammelhagger01]

Rsdop said:

The fact that sometimes it's running fine and sometimes it's not would make me think it's an electrical issue rather than a mechanical one. I've just done a load of work on my 330ci, including vanos seals, intake boot, CCV, Disa valve etc.
The car is now running better in that I'm getting more mpg and definitely a bit punchier, but it didn't feel particularly bad before the work and was showing no fault codes. Only when I did the work I discovered the intake boot had big holes in it, the CCV was completely blocked and so for the symptoms you describe I would think it's a different problem.
Is the new MAF that you mention a genuine one?

Yes..... the MAF and all the sensors changed are all org. BMW parts.

[BuzzBravado]

Gammelhagger01 said:

BuzzBravado said:

Regarding the gear changes.... have you changed the clutch delay valve? There is a mod where you can do away with the valve and its supposed to make gear changes better.

No.... was´nt aware it had a delay valve... :-)

Yeah it was supposedly a good mod to do on early e46's. My 330CI was a 2004 so it had a updated delay valve which meant it wasn't so important that i looked at it. I think the idea behind the valve is that it made clutch engagement smoother instead of allowing the driver to quickly bang it in gear. Think soft close kitchen doors

Edited by BuzzBravado on Wednesday 25th May 09:14

[RobM77]

BuzzBravado said:

Gammelhagger01 said:

BuzzBravado said:

Regarding the gear changes.... have you changed the clutch delay valve? There is a mod where you can do away with the valve and its supposed to make gear changes better.

No.... was´nt aware it had a delay valve... :-)

Yeah it was supposedly a good mod to do on early e46's. My 330CI was a 2004 so it had a updated delay valve which meant it wasn't so important that i looked at it. I think the idea behind the valve is that it made clutch engagement smoother instead of allowing the driver to quickly bang it in gear. Think soft close kitchen doors

Edited by BuzzBravado on Wednesday 25th May 09:14

The problem is that if you have good clutch control and don't use the clutch clumsily, it'll ruin your gearchanges and pulling away. The CDV, which as far as I know is still fitted to BMWs to this day, only really benefits people with no clutch control. I always thought that's what automatics were for personally!

[caliban413]

Hi Gammelhagger. Sorry to revive an old thread but did you ever find a solution to your problem?



I have an e46 330ci and like you I changed most of the commonly suggested parts:
including
MAF,
Cam sensors,
Vanos seals
Fuel filter
Fuel pump
all O2 sensors.
all rubber and plastics seem fine and in good condition.

all original BMW parts (except for the vanos repair kit)

Furthermore I upgraded to the latest ECU and gearbox firmware.
INPA says everything is within spec.

Still nothing.

I have found that running on 99 octane increases the chances a "strong" day.