'82 euro M110 280E, wasted spark ignition conversion, am I forgetting something? - PeachParts Mercedes-Benz Forum

fha772 · #1 02-17-2014, 11:59 AM

Hi all,

I have a 1982 euro 280E, with a M110 engine, that I'm currently converting to wasted spark electronic ignition.
(I'm using a Canems ecu, like a megajolt conversion without needing a Ford EDIS.)

I'm nearly ready to fire it up with the new ignition system.
But I have a nagging feeling that I'm missing/forgetting something.
In the back of my mind I have a feeling that the Bosch K-Jet/CIS fuel injection won't work because it gets a signal from the original ignition, am I correct?

If so, can somebody explain to me what's missing?
And is there a way round it?

Also, I'm planning to remove the over-complicated Mercedes fuel pump relay, and replace it with normal 4-wire relay.
Will this cause me any problems with the injection system?

Cheers Frank.

Ps, this is stage 1 of my project, it will be converted to full EFI in the future, using BMW M3 thottle bodies.

Frank Reiner · #2 02-17-2014, 12:42 PM

Quote:

Originally Posted by fha772

Hi all,

I have a 1972 euro 280E, with a M110 engine, that I'm currently converting to wasted spark electronic ignition.
(I'm using a Canems ecu, like a megajolt conversion without needing a Ford EDIS.)

I'm nearly ready to fire it up with the new ignition system.
But I have a nagging feeling that I'm missing/forgetting something.
In the back of my mind I have a feeling that the Bosch K-Jet/CIS fuel injection won't work because it gets a signal from the original ignition, am I correct?

If so, can somebody explain to me what's missing?
And is there a way round it?

Also, I'm planning to remove the over-complicated Mercedes fuel pump relay, and replace it with normal 4-wire relay.
Will this cause me any problems with the injection system?

Cheers Frank.

Ps, this is stage 1 of my project, it will be converted to full EFI in the future, using BMW M3 thottle bodies.

The only signal from the ignition to the K-jet system (your version) is to the fuel pump relay. You apparently are treating that situation independently, and that "fix" will not affect the injection.

fha772 · #3 02-17-2014, 12:47 PM

Thanks, that's probably it, it's just been bagging at me over the last couple if days, that there was something glaringly obvious that I was missing.

Fingers crossed for next week!!