opie188

Can someone please help? Im new here and and wondering why Im having this problem. I have a 1989 951. it has no spark. I installed a new coil. A new DME relay. A new DME. New Ref sensor and Speed sensor. I set the air gap on them as well and also checked the pick up pin on the fly wheel. its good. Thats what i used to set the air gap. Anyway, I still have no pulse from pin 1 from the DME. I have fuel pump actuation and injector signal pulse. So, what in the world is my issue??? Thanks in advance for any help!!!

mclarenno9

Try bypassing the KLR...

https://rennlist.com/forums/944-turb...lr-bypass.html

opie188

Thanks mclarenno9! How do you do that?

PerryB

Remove the KLR from its harness. With a double male jump wire, with narrow spades, jump female pins #9 and #16.

I am also having this problem and have done what you have done, with no success.

Who rebuilt your DME?

Perry

Tom M'Guinn

Is the tach bouncing/twitching when you crank it? When you replaced the speed and ref sensors, did you check under the rubber boots on the harness side? Those connectors (the ones on the engine harness, not the ones that come with the sensors) are a common failure point. They look fine from the outside, but when you peel back the rubber covers the wires are all frayed inside. Worth checking if you haven't already....

opie188

The DME is from the dealer. Ill try bypassing the KLR today. And Ill check the wires to the sensors.

opie188

I am getting tack bounce also.....

konakat

Sounds like a wiring issue if you have tach bounce and injectors are firing.

drive135mph

There is a really well done video on refence sensor testing out there on youtube :

opie188

Both sensors are new and working

KevinGross

Nice video.

944_nut

How did you test for pulse at pin #1 on the DME? I assume you have 12VDC at the coil pins (to ground) with the ignition on?

opie188

Update. I pypassed the KLR and it runs. Does that mean i need a KLR? And where can i get a used one?

Tom M'Guinn

Sounds like you found it...

www.ecudoctors.com can fix your KLR or sell you a rebuilt one...

opie188

Thanks everyone for your help!!!!!!!!