Author Topic: M42 engine max speed problem (Read 3501 times)

scmooncake · « **on:** January 30, 2009, 09:49:45 AM »

Dear brother,
My car is 95 E36 M42 318IS AT. My engine can`t run above ~4500rpm...in either P,N and D shift. Is it had any prossible cases? I had already check the fault code (only 72 speed sensor problem). Many thanks for your kindly help!

roundel318 · « **Reply #1 on:** February 04, 2009, 03:05:44 PM »

What happens to it above?
Does it cut like it's hitting redline / fuel cutoff?

xwill112x · « **Reply #2 on:** February 04, 2009, 05:45:24 PM »

its prob a 325 gauge. they act like there redlineing at 4500, but there really at 6500...when put on a m42

your tach is probly just off a bit.

Boosted E30 · « **Reply #3 on:** February 04, 2009, 10:33:32 PM »

you need either a crankshaft sensor or theres probably an eninge speed sensor for the computer. mostlikly mounted on or around the transmision bell housing.

nicknikolovski · « **Reply #4 on:** February 05, 2009, 02:08:36 AM »

You can find one at Pelican Parts for $50.00.

scmooncake · « **Reply #5 on:** February 05, 2009, 10:11:48 AM »

It cut like it's hitting redline / fuel cutoff, anyway thanks to all of your kindly advise. i will check those possible cases !

roundel318 · « **Reply #6 on:** February 05, 2009, 10:18:25 PM »

I have had this issue with my car.
Replacing the Crankshaft position sensor and reseating the ECU connector solved it.

scmooncake · « **Reply #7 on:** February 06, 2009, 12:16:19 PM »

Dear roundel318
Thanks for your helpful info!!
Is it had any fault code?

BoostedEverything · « **Reply #8 on:** February 06, 2009, 01:55:27 PM »

If you need a replacement sensor, shoot me a PM. I just stripped a running motor.

roundel318 · « **Reply #9 on:** February 07, 2009, 09:50:56 AM »

That was part of the pain, I got no fault codes from it.

xwill112x · « **Reply #10 on:** February 08, 2009, 10:27:59 AM »

i think qiuene30 may be depressed....

sad sad story

colin86325 · « **Reply #11 on:** February 10, 2009, 10:04:52 AM »

I had a problem like that on my M3. Somebody had swapped a 6-cylinder engine cluster into the car, so the rpms read 2/3 of the actual value.