Putting late fusebox in early car
06-24-2010, 05:18 PM
#16
Rainman
Rennlist Member
Rennlist Member
Thread Starter
well, StrekStrekStrekStrek it.
went out to start the car to run an errand, no dice. after many many more tries, wiggling and tapping the dme relay and computer i still got nothing. pulled the fuse block down, swapped relays, still nothing.
anybody got a diagram of the ignition circuit from the key to the dme relay to the computer and wherever else it goes? im just going to replace the whole damn thing
car ran PERFECTLY this morning for probably an hour driving around with multiple stops along the way, started up with no issues.
went out to start the car to run an errand, no dice. after many many more tries, wiggling and tapping the dme relay and computer i still got nothing. pulled the fuse block down, swapped relays, still nothing.
anybody got a diagram of the ignition circuit from the key to the dme relay to the computer and wherever else it goes? im just going to replace the whole damn thing
car ran PERFECTLY this morning for probably an hour driving around with multiple stops along the way, started up with no issues.
07-10-2010, 11:46 PM
#18
Racer
Join Date: Oct 2007
Location: Honolulu
Posts: 429
Likes: 0
Received 0 Likes
on
0 Posts
I've been ignoring this same problem in my 84 for about 6 months now. I have not solved it, but I was able to start it yesterday and today. Talk about a much needed drive.
I'm suspicious that it's not the speed and ref. sensors, but rather a poorly seated DME relay. The wiggling and tapping solution sometimes works, but the reconnecting of the s/r sensors works less often. Coincidentally, this problem has also made me think about whether it would be a good idea to relocate the fusebox and relay panel to somewhere with better access.
I'm suspicious that it's not the speed and ref. sensors, but rather a poorly seated DME relay. The wiggling and tapping solution sometimes works, but the reconnecting of the s/r sensors works less often. Coincidentally, this problem has also made me think about whether it would be a good idea to relocate the fusebox and relay panel to somewhere with better access.
07-22-2010, 07:18 AM
#20
Burning Brakes
07-22-2010, 07:27 AM
#21
Burning Brakes
I've been ignoring this same problem in my 84 for about 6 months now. I have not solved it, but I was able to start it yesterday and today. Talk about a much needed drive.
I'm suspicious that it's not the speed and ref. sensors, but rather a poorly seated DME relay. The wiggling and tapping solution sometimes works, but the reconnecting of the s/r sensors works less often. Coincidentally, this problem has also made me think about whether it would be a good idea to relocate the fusebox and relay panel to somewhere with better access.
I'm suspicious that it's not the speed and ref. sensors, but rather a poorly seated DME relay. The wiggling and tapping solution sometimes works, but the reconnecting of the s/r sensors works less often. Coincidentally, this problem has also made me think about whether it would be a good idea to relocate the fusebox and relay panel to somewhere with better access.
The bypass cable (see Clarkes Garage Workshop manual) will bypass the ECU and give constant fuel pumping and ignition feed . It might narrow down your search.
The crank sensor is a simple magnet with a coil of wire round it. Nothing much to go wrong, however the coil can go open circuit (check using continuity test with multimeter) more often it is a break in the wires from the sensor due to heat making the wires brittle.
Have you cleaned the connectors to all the sensors ? and the ground points for the ECU & DME on the top chassis rail in front of the battery ?
