'90 E30 325i bucks/jerks between 2000rpm - 3000rm

Post Mon Jun 27, 2005 1:26 pm

Hi Guys...

I have a problem with my e30, between 2000rpm and 3000rpm the car tends to jerk/stutter a bit. At first i thought it might be because the car was cold, but it happens if the car is at optimal temp as well. A couple of guru's reckon a couple of my injectors could be clogged-up... How true is this? Any ideas

Thanks!

Post Mon Jun 27, 2005 1:31 pm

It could be many things.

Ive found my idel control valve was casuing this as it was knackeered and kept closing and opening when it felt like it. The problem just got worse and caused massive backfiring.

Cleaning it didnt help as it was the elecrics at fault and not the actual mechanism.

Could be a host of other things.

You need to tackle this with great caution otherwise you might end up replacing parts which are perfctly ok.

Be logical and you'll find the problems.

Here's a initial list of things you should check.

Idle control valve (unlplug it and drive it and see what happens)
AFM
Fuel Pump and fuel filter
Injectors - unlikely if its not doing funy things at higher rpms

Good luck!

Post Mon Jun 27, 2005 1:35 pm

Thanks Mr. M5pilot !

I have been battling with this prob for ages! These BMW drivers in South Africa know ........!!!! about Bimmers!

Guest · Post Mon Jun 27, 2005 1:47 pm

M5pilot wrote:
Idle control valve (unlplug it and drive it and see what happens)

Good luck!

where about is that located in the engine? I've got a similar problem?

Post Mon Jun 27, 2005 1:52 pm

here's some pics to give you a location...

M20

M40

hope that helps????!

Guest · Post Mon Jun 27, 2005 1:53 pm

TY, I'll unplug the ICV and see what happens. Cheers fella

Post Mon Jun 27, 2005 1:56 pm

Thanks!

Post Mon Jun 27, 2005 1:58 pm

no probs people!!!

do a search for andy_magic s guide on getting the car to run right (REALLY good)

Post Mon Jun 27, 2005 2:23 pm

should i try searching this site for andy_magic s guide ??

Post Mon Jun 27, 2005 2:31 pm

fannyj wrote:should i try searching this site for andy_magic s guide ??

yup-just use the search function at the top of the page

Post Mon Jun 27, 2005 5:41 pm

Neil, is that pic of the m20 out of a 5 series???

somethings are different in my engine bay

Post Mon Jun 27, 2005 11:31 pm

billgatese30 wrote:Neil, is that pic of the m20 out of a 5 series???

somethings are different in my engine bay

yeah its e34 mate-only one i could 'borrow' offa google! the expansion tank arrow points to the right place tho

you're the first one to notice