DME Relay (was:No Start -- FIXED!)
Thread Starter
Instructor
Joined: May 2001
Posts: 165
Likes: 0
From: Altamonte Springs, FL
Can we tie it to a mileage figure? Mine had 42,000
I really don't think it was water related. That car gets washed and hosed off fairly frequently. I'm also in complete denial that it's harness related.
I really don't think it was water related. That car gets washed and hosed off fairly frequently. I'm also in complete denial that it's harness related.
Addict & Guru
Rennlist Member
Rennlist Member
Joined: May 2001
Posts: 3,897
Likes: 3
From: St. Louis
It could have been a bad batch of relays, during a late production run, accounting for random failures, but primarily in 993 rather than 944 models.
Since the relay was updated to a 993 number, I assume those who work for Porsche's "Secrets That Will Die With Us Dept." know the real story. Same people know why our windshields rattle, the '95 harnesses disintegrate, the slave cylinders fail, etc., etc. <img src="confused.gif" border="0">
Since the relay was updated to a 993 number, I assume those who work for Porsche's "Secrets That Will Die With Us Dept." know the real story. Same people know why our windshields rattle, the '95 harnesses disintegrate, the slave cylinders fail, etc., etc. <img src="confused.gif" border="0">
Addict
Lifetime Rennlist
Member
Lifetime Rennlist
Member
Joined: May 2001
Posts: 7,254
Likes: 35
From: Austin TX
[quote]Originally posted by Bob - 95 993/C2:
<strong>Can we tie it to a mileage figure? Mine had 42,000
I really don't think it was water related. That car gets washed and hosed off fairly frequently. I'm also in complete denial that it's harness related. </strong><hr></blockquote>
Mine went bad on my 97 model with 15K miles. Had the 944 part no. I was at the track at the time and a couple people had this relay and it had the 944 part no. and they didn't work either, so I used a jumper wire and had a guy that owns a shop bring one to the track with him.
Greg
<strong>Can we tie it to a mileage figure? Mine had 42,000
I really don't think it was water related. That car gets washed and hosed off fairly frequently. I'm also in complete denial that it's harness related.
</strong><hr></blockquote>Mine went bad on my 97 model with 15K miles. Had the 944 part no. I was at the track at the time and a couple people had this relay and it had the 944 part no. and they didn't work either, so I used a jumper wire and had a guy that owns a shop bring one to the track with him.
Greg
Addict
Rennlist Member
Rennlist Member
Joined: Jun 2001
Posts: 131
Likes: 1
From: Florida
I had the DME relay fail on my 1990 944 S2. It was the original relay and had been intermittently caused hard starting before it eventually failed completely. I replaced it with a new 993 part number relay and the starting problems were solved.
Out of curiosity, I disassembled the failed relay and found two problems. The coil which pulls in the fuel pump contact had discolored windings (signs of overheating). More interesting than that was discovering a loose contact point on the relay itself. This contact had its rivit come loose allowing it to make an intermittent connection with its associated copper strip. I believe this may have caused the intermittent starting and rough running problems up until the time the relay coil failed completely.
Out of curiosity, I disassembled the failed relay and found two problems. The coil which pulls in the fuel pump contact had discolored windings (signs of overheating). More interesting than that was discovering a loose contact point on the relay itself. This contact had its rivit come loose allowing it to make an intermittent connection with its associated copper strip. I believe this may have caused the intermittent starting and rough running problems up until the time the relay coil failed completely.
6th Gear
Joined: Feb 2010
Posts: 6
Likes: 0
From: Belgium
993 turbo exact same problem
Hi guys,
I know this topic is very old but i have the exact same problem.
After a nights sleep the car won't start. Looked at the DME relais and it was burnt on one contact.
Replaced it with a new relais but still the same problem. The fuseboard itself also looks a little burnt.
any advise ?
I know this topic is very old but i have the exact same problem.
After a nights sleep the car won't start. Looked at the DME relais and it was burnt on one contact.
Replaced it with a new relais but still the same problem. The fuseboard itself also looks a little burnt.
any advise ?
