high rpm bog?

[rThor432]

You can still tap into where the cruise is normally mounted on the cluster. You can pick up the green plug from the boneyard and then just wire into that. My car didn't have cruise or the OBC, but I did use the green plug to pick up the signal.

[hendrixvodu]

You can wire it into several spots. The easiest are the cruise control pick-up (green plug that plugs into speedo) or the OBC. Both of those see the speed signal.

wellllllllllll....the car did come with cruise and it has no obc hahha its a base 318 no power windows, cruise, obc, check panel, ect hahah so anywhere else i can try?

[rThor432]

anyone know what i wire it to?

You can wire it into several spots. The easiest are the cruise control pick-up (green plug that plugs into speedo) or the OBC. Both of those see the speed signal.

[hendrixvodu]

anyone know what i wire it to?

[hendrixvodu]

well then thats my problem...any clue where i wire it to in the back of the cluster? i have a 90 m20 cluster but its an 84...so i assume the wiring is different?, thanks a lot guys this saved me a lot of headaches..i really thought it was fuel pump related haha

[rThor432]

But all OBD-I cars (or M50TU) need the speed sensor signal unless the they have the speed sensor delete chip, correct?

Oh yeah, absolutely. Without the signal or speed sensor delete the engine won't rev above 6,300 rpm.

A few other things (like VANOS) are affected by the lack of signal as well resulting in the car not performing 100% ideally. IIRC that is because without the speed signal the DME doesn't sense an engine "load".

[BenM]

This is what I mean by speed sensor.

Yeah I know. I remembered the soft rev cut, but couldn't remember about the speed sensor.

'95 E36 would have the 2.5 technical update (VANOS) motor. That's all he's talking about.

But all OBD-I cars (or M50TU) need the speed sensor signal unless the they have the speed sensor delete chip, correct?

[rThor432]

?

'95 E36 would have the 2.5 technical update (VANOS) motor. That's all he's talking about.

[matt]

Sounds like you may be missing the speed signal from the harness to the cluster and experiencing a soft rev cut.

http://www.r3vlimited.com/board/show...63&postcount=3

This is what I mean by speed sensor.

[BenM]

Don't know why people keep missing this easy fix...

Seriously. Late model cluster should be easy to wire up too.

It doesn't apply to NV's, or late model car I think.

car is an 84 318i with m50tu from a 95 e36

?

[SamE30e]

It doesn't apply to NV's, or late model car I think.

[jahnaboi]

Sounds like you may be missing the speed signal from the harness to the cluster and experiencing a soft rev cut.

http://www.r3vlimited.com/board/show...63&postcount=3

Don't know why people keep missing this easy fix...

[BenM]

Sounds like you may be missing the speed signal from the harness to the cluster and experiencing a soft rev cut.

http://www.r3vlimited.com/board/showpost.php?p=1676063&postcount=3

[hendrixvodu]

i will check that out...i have a chip and the red is 7...it cuts at 6ish

[JGood]

How high of RPM's does it cut out at? My buddy had an m50 e34, and the ground wire in the front of the engine, near the lift point, was bad. There is a resistor on that ground wire inside the fuel injection harness housing, and his had failed. His car cut out at around 5k-6k IIRC.

Just a cheap/easy thing to check.