Re: 318i/m42 with stumbling problems

["David Orr" <orrs@xxxxxxxxxxxx>]

Shaun,

   Have you done a compression test and a leak down test?
Sounds like you may have a burnt exhaust valve.

Dave Orr


- ----- Original Message -----
From: "Shaun Dustin" <sdustin@domain.elided>
To: <bmw@domain.elided>
Sent: Friday, February 21, 2003 9:41 AM
Subject: 318i/m42 with stumbling problems


> Well, here we go again. I've been trying to chase down the gremlins in my
> '91 318i (m42 engine) for about a month now. Thanks to all who provided
> advice earlier, but the problem still won't go away. It's stumbling
through
> the whole rpm range, most notably under load. It gives a little "pop" now
> and then in the exhaust note at idle, and it seems a little gutless on
hard
> acceleration-stutters and surges.
>
> I've replaced the ICV, the plugs and the O2 sensor, and I can feel a
> difference but the core problem is still there. I'm replacing the temp
> sensor (coolant) today, and I think that will cover everything that
provides
> feedback to the computer, except for the position sensor. I checked the
> coils, and they are all reading between .7 and .8 ohms resistance on the
> primary side-within spec. Next on my list is replacing the vacuum lines,
> then plug wires, then coils. Any comments or any other ideas what the
> problem might be would really be appreciated, especially if they keep me
> from having to spend too much more on things that come in little tiny
boxes.
> Is there any way to check the plug wires before dropping $120 on a new
set?
> Thanks
> Shaun Dustin
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