Engine Problem

seb928s · 05-24-2002, 12:40 PM

Still I can't get my 1986 951 to fire. After the rebuild that I needed to do because of bent valves; I put it all back together and it will not fire. When you turn the key once it is at 0 bar it needs to be at 1 bar to fire. It gets no fuel or spark. Yes I have replaced the DME relay and still nothing. It would be a help if any of you know what this is or can someone post a link to a website that has the factory workshop manuals on the internet? The car ran fine before I bent the valves.

Bob's944 · Bob's944's Garage

just curious.... but how did you bend your valves? I thought only the normally aspirated 944's were interference engines... is that not true?

seb928s · 05-24-2002, 01:28 PM

The timing belt tensioner bearing blew out and the valves hit the piston. The turbo's can beld valves but not as easy as the NA because the compression is lower.

robm-951 · 05-24-2002, 07:56 PM

Quote:

Originally posted by seb928s
When you turn the key once it is at 0 bar it needs to be at 1 bar to fire. It gets no fuel or spark.

Check that the reference sensors are still connected. Did you disconnect these at all? If so, you might have the two mixed up. Could you have disconnected or broken any of the grounds that go to the back of the engine? The klr is what runs the factory boost gauge. It also intercepts the ignition signal and sends it back to the DME (for knock control). If you find a disconnected ground, then The DME/KLR test manual says trying to start the engine with the grounds disconnected will destroy the control unit immediately. You can bypass the klr by jumpering pins 9 and 16 on the klr connector to see if it starts without the KLR box.

Good luck,
Rob