E36 help?

[Zerotonine]

I have a e36 316i and in first gear if it goes over 1500 rpm it judders like its trying to cut out, only happens in 1st gear, what is causing this?

[whipsey]

silly question is your foot fully off the clutch pedal?

[Zerotonine]

Yeah completely off

[whipsey]

maybe an air leak check all your hoses etc for splits

[Zerotonine]

Thats what I thought it could be, wouldn't it happen in all the gears?

[Jeepster]

Yeah it would, at least i would have thought so. I would get the car plugged into a diag machine for starters.

[Zerotonine]

It does it only intermittantly at the moment, How much would it be to get it on a diagnostics machine? Ballpark figure?

[whipsey]

normally its £60 call out charge shame your not nearer mines only £20

[Jeepster]

£60? Just take it to an indy that has the diag equipment, shouldn't be more than £40.

[whipsey]

call out charge seems to be the average around here

[B7]

Does it only do when you pull away quickly / feircely?

Check the rubber bellow from the AFM to the throttle body. These have a tendancy to split and they remain closed on normal driving but when "going for it" the engine moves more and opens the split....bingo, massive air leak.

Had it on a 94 318i last year.

[Jeepster]

call out charge seems to be the average around here

My bad, I didn't notice the call out bit.

@B7 my experience is that its the other way round, as more air is required the MAF cannot keep up, so the ECU stops taking stats from the MAF and resorts to the Lamda sensors and then pre-set mapping. As the revs rise the car runs better, its only on the lower revs that the MAF provides the most information and thats when an air leak would so itself to cause lumpy idle and difficulty in rising revs, once over say 3k the car would run fine.

I think this is very strange as it only does it in one gear..

[Zerotonine]

It does only happen when giving it the beans normally I change up before it does it but when put foot down it does it. And definately only in first gear.

[Zerotonine]

Just thought I would let the people know that I finally got round to sorting out the problem and it was the rubber boot between the AFM and throttle body, it was totally fooked. £30 from the stealers and the car is running sweet as now. Thanks for the help guys!

[thebigone]

If that was the prob then you might like to checl out the engine mounts, as they tend to go cuasing the boot to split in the first place.

[Zerotonine]

Ok Will do