E30 Zone

Could someone give me a little guidance with the non start problem I'm facing please?

I have a 1990 325 Cab Auto. Parked for nearly 10 years under a tarp. Was running before I left it.

I've done some searches and read other posts for what to try and have been doing some checking from the advice given but I'm still not running.

I seem to have no spark or fuel

Things I've done \ Tested.

Drained the tank and added 5L of fresh fuel.

New BMW CPS as symptoms and other posts outcomes pointed at this.

ECU
- Checked for resistance of CPS at the ECU plug.
- Check for 12v on ECU plug pins 18 & 37

Bridged fuel pump relay - pump runs. Checked fuel flow at the rail.

Bridged main white relay - ABS pump makes a noise.

Tested for 12v on the coil.

Check for spark with both relays bridged and got spark but seems to be no fuel on the spark plugs.
Check for spark with relays in - no spark.

Watched the Rev counter while cranking - no movement.

I'm not sure if this means anything but the battery light on the cluster is not lit at any point.

The ICV makes no noise at all but I don't think this would stop starting would it?

There doesn't seem to be any corrosion on the wiring plugs in the engine bay.

Compression seems OK, number 6 was a little down on the others but I may have got a good seal on the tester.

It turns over well but makes no effort to fire.

Any thoughts on what to look at next?

Thanks

Have you gone through this?

https://www.e30zone.net/e30wiki/index.p ... oubleshoot

"Watched the Rev counter while cranking - no movement."

CPS.

Ben

Your ECU could be corrupt or damaged by moisture from the long store. Saw a guy on YouTube recently with exact same issue on a stored E24. Tried so many things. New ECU fixed it instantly

Jast as an aside - if this car has not been run for 10 years - I trust you've fitted a new cambelt before attempting to start it?

and does the main relay click when you put the ignition on?

Paul

Thanks for all the replies

I must admit I'd seen the Wiki but missed some of the pins to check for voltage - I'll check them.

The CPS is a new genuine one thank Ben.

The ECU was my concern.

Yes Paul, a new belt has gone on. Yes, I'm pretty sure I remember it clicking but will check. I have bridged both the Fuel pump and the main relay from that I get a running fuel pump and spark.

Thanks

Just feeding back with the outcome.

It was the ECU.

Fired up first time with a replacement ECU. All be it it ran like a bag of spanners but it fired up.

I can safely say that leaving your E30 in the corner of a muddy, damp car park for the best part of 10 year is not recommended

Thanks for the suggestions

Daz666 wrote: ↑

Wed Aug 24, 2022 12:11 pm

Just feeding back with the outcome.

It was the ECU.

Fired up first time with a replacement ECU. All be it it ran like a bag of spanners but it fired up.

I can safely say that leaving your E30 in the corner of a muddy, damp car park for the best part of 10 year is not recommended

Thanks for the suggestions

Well done