update question on knock and ping
 

93 325i, when cold, no knocking and pinging. when warm, knocks and pings.
cyl head temp sensor? any thoughts?

In article <if7Od.49951$bu.42467@fed1read06>,
Erik > wrote:
> 93 325i, when cold, no knocking and pinging. when warm, knocks and
> pings. cyl head temp sensor? any thoughts?

These temperature sensors tend to work or not. And when they fail, give a
*very* rich mixture with the engine hot - so much so that it might not run.

But you can check them with a DVM.

I'd say the obvious one was the knock sensor.

--
*If you must choose between two evils, pick the one you've never tried before

Dave Plowman London SW
To e-mail, change noise into sound.

I'm sorry. I should have mentioned it does NOT have a knock sensor.

"Dave Plowman (News)" > wrote in message
...
> In article <if7Od.49951$bu.42467@fed1read06>,
> Erik > wrote:
>> 93 325i, when cold, no knocking and pinging. when warm, knocks and
>> pings. cyl head temp sensor? any thoughts?
>
> These temperature sensors tend to work or not. And when they fail, give a
> *very* rich mixture with the engine hot - so much so that it might not
> run.
>
> But you can check them with a DVM.
>
> I'd say the obvious one was the knock sensor.
>
> --
> *If you must choose between two evils, pick the one you've never tried
> before
>
> Dave Plowman London SW
> To e-mail, change noise into sound.

In article <O4hOd.50874$bu.37116@fed1read06>,
Erik > wrote:
> I'm sorry. I should have mentioned it does NOT have a knock sensor.
Ah - sorry. Thought it had the 24 valve engine by then.

--
*It sounds like English, but I can't understand a word you're saying.

Dave Plowman London SW
To e-mail, change noise into sound.

Well, damn. I think is does. I checked the vin and it dd not have the 'F' in
the 5th letter, so I assumed that it had the Vanos 24 valve engine minus the
knock sensor. Forgive my ignorance, I am trying to learn when i have the
time. Just to be certain, I thought all '93's have a 34 valve Vanos engine.
Am I mistaken? Either way, when the car is cold, it runs great, once it
warms up, knocking and pinging. So, now I guess I have two questions :)


"Dave Plowman (News)" > wrote in message
...
> In article <O4hOd.50874$bu.37116@fed1read06>,
> Erik > wrote:
>> I'm sorry. I should have mentioned it does NOT have a knock sensor.
> Ah - sorry. Thought it had the 24 valve engine by then.
>
> --
> *It sounds like English, but I can't understand a word you're saying.
>
> Dave Plowman London SW
> To e-mail, change noise into sound.