ollieleven

So my 928 starts first time idles a little low but once engine is hot it won't hold an idle at traffic lights and stalls then it will start but idles so low just stalls again.

It's been at a specialist for couple months they changed temp 2 , TPS, vacuum pipes and a load of other stuff. i bought it home 2 days later once hot did same thing.

I did some digging on rennlist and google and found it might be crank speed sensor playing up when hot so i bought a new one and tried to fit it myself which is pretty tough. i got bolt out and got it moving but have no space to really pull it up and didn't want to snap it off like the 100 horror stories i've read. So i turned my attention to the plug under the throttle wheel pulley. it was in a real mess and so is the harness.


housing broken off in otherside of plug






The harness end was bend 180 back on itself so this had happened.


Does anyone know where i can buy the harness and what it's called. i've found full engine harnesses but they are nearly $1000. i'm in the UK too so local would be a bonus. Thanks in advance i'm new to fixing my own car and the 928 is firmly in the at the deep end

outbackgeorgia

Well, just my opinion, but the connector serves only a purpose for vehicle assembly. The sensor itself is very reliable and is NOT a high failure item. It is not periodically replaced. I just cut the connector off each harness, soldered the wires (carefully match colors) using shrink wrap over each splice, and a larger one over the three wires. This is actually a more relible connection than a connecror.
Dave

ollieleven

I was going to try that last night but thought as i had new sensor already was worth changing it. i'd read that the magnets in the sensor degrade after long time and give odd signals when hot. people were recommending changing the CPS as a preventative measure as it's nearly 30 years old.

I'll splice the wires together and see how it runs.

Cheers

Mrmerlin

get a new crank sensor and buy a new 3 pin AMP connector,
Roger has all of what you need and ships to the UK.

NOTE click on user CP at the top of the page ,
and add your vehicle info at the edit signature section.

NOTE I dont suggest using any of the old sensors and fitting new connectors to them,
OK to fit a new connector to the car side of the harness.

to remove the old sensor,
get some mechanics wire and double it up,
then twist the CPS so you can wrap the wire around the CPS,
use a prybar and wrap the wire around it,
and use the prybar to pull the sensor straight up it should come free use PB blaster

ollieleven

I've been spraying penetrating spray on every day for few days and wiggling it back n forth, i did have some wire but i can't get it under the sensor at all as there is no gap yet. my problem is access. i've taken the MAF out, should i take the throttle pulley and bracket out? there seems to be fuel lines joined to it and the earths looks like a PITA to get out. i feel like it need to take the manifold off to get to it properly but not sure i'm up for that.

ollieleven

[QUOTE=Mrmerlin;13197639]get a new crank sensor and buy a new 3 pin AMP connector,
Roger has all of what you need and ships to the UK.

Who is roger? do you have link to his store?

Thanks for your help !

Mrmerlin

OK you missed the part about twisting the sensor about 60 degrees to have an area to wrap the wire around
Try
Roger@928srus.com

Adk46

"Roger" means 928srus.com. You would find something comforting about him if you got him on the phone.

ollieleven

Awesome i'll give it a try again with the wire. i managed to find a connector on ebay shipping from Australia i'm london so i'll see if roger might be quicker.

Thank for your help!