Notices
924/931/944/951/968 Forum Porsche 924, 924S, 931, 944, 944S, 944S2, 951, and 968 discussion, how-to guides, and technical help. (1976-1995)
Sponsored by:
Sponsored by:

Speed sensor removal - - I'm confused ?

Thread Tools
 
Search this Thread
 
Old 09-18-2003, 07:13 PM
  #16  
Kevin Baker
Drifting
 
Kevin Baker's Avatar
 
Join Date: Nov 2002
Location: Conroe Texas
Posts: 2,551
Likes: 0
Received 0 Likes on 0 Posts
Default

Hey James. I know that you don't want to just throw parts at the car, but for what it's worth, when mine was stalling, and by stalling I mean shutting down completely and not starting again for hours, I finally chased it down to the DME engine temp sender. Its the one that tells the DME what the coolant temp is, it's different than the one that is in the radiator. It is located on the engine block, just below the injector boot ( J hose).
Old 09-18-2003, 08:19 PM
  #17  
PeteL
Got Nothin'
Rennlist Member
 
PeteL's Avatar
 
Join Date: May 2002
Location: Tampa, FL
Posts: 4,977
Received 6 Likes on 3 Posts
Default

Hell, may as well try it. Also, have you swapped a DME in there? Maybe there is a loose solder. When you hit a bump...car no runny. Hopefully someone may have a spare for this experiment.
Old 09-18-2003, 10:35 PM
  #18  
goingboeing737
Burning Brakes
Thread Starter
 
goingboeing737's Avatar
 
Join Date: Dec 2002
Location: Houston,Tx. Texas GreaseSlingers
Posts: 949
Likes: 0
Received 0 Likes on 0 Posts
Default

89magic98,
I have not tried to adjust the bracket for the sensors. I can't believe that it would be out of wack from just removing the sensors???? I didn't touch it I swear.....

I did take it out yesterday and it sat for about an hour and half @ Starbucks. Started perfect when I was ready to go.

Didn't have time to mess with it today. Got a nasty gram from homeowners association and had to weed and mulch the flowerbeds

Geo, If you're around tomorrow, give me a call and stop by. You can help me push this thing to a cliff......
Old 09-19-2003, 12:09 AM
  #19  
Tom Carson
Burning Brakes
 
Tom Carson's Avatar
 
Join Date: Nov 2002
Location: new york
Posts: 1,141
Received 0 Likes on 0 Posts
Default

Originally posted by goingboeing737
89magic98,
I have not tried to adjust the bracket for the sensors. I can't believe that it would be out of wack from just removing the sensors???? I didn't touch it I swear.....
it was out of whack before you removed them

Originally posted by 89magic98
In that case, you should probably adjust the whole assembly to get the spacing correct (which is the equivalent of adding the spacer washer that you tried)...clark's garage site has the procedure on this.
Old 09-19-2003, 08:48 AM
  #20  
Kevin Baker
Drifting
 
Kevin Baker's Avatar
 
Join Date: Nov 2002
Location: Conroe Texas
Posts: 2,551
Likes: 0
Received 0 Likes on 0 Posts
Default

If the sensor block is out of adjustment, would that cause an intermittent problem or a consistant problem? I would have thought an adjustment issue would not "change" day to day.
Old 09-19-2003, 12:11 PM
  #21  
goingboeing737
Burning Brakes
Thread Starter
 
goingboeing737's Avatar
 
Join Date: Dec 2002
Location: Houston,Tx. Texas GreaseSlingers
Posts: 949
Likes: 0
Received 0 Likes on 0 Posts
Default

The car has run fine for a year, never a starting/running issue till the intermittent stalling started a couple of weeks ago.

Guess I'll slap in another DME relay today and see what that does.


Sure is a nice day here today,,,wish I could drive my car
Old 09-19-2003, 01:33 PM
  #22  
89magic98
In the Sink
Rennlist Member

 
89magic98's Avatar
 
Join Date: May 2003
Posts: 10,981
Likes: 0
Received 97 Likes on 75 Posts
Default

Since one of your sensors was badly scored, I assume that it was sitting way too close to the flywheel. There is a minimum spacing spec for this.

If you don't have the spacing correct, the quality of the signal going back to the DME will be different, and may not be interpreted properly by the DME. In other words, there is an exact spacing requirement. You should do this adjustment before moving on to anything else.

You said you were experimenting by putting shim washers in place, which is not as good as adjusting the whold assembly that holds the two sensors in place.

If the assembly is loose, maybe hitting a pothole causes it to move up and down, causing a stall / no start.
Old 09-19-2003, 01:44 PM
  #23  
goingboeing737
Burning Brakes
Thread Starter
 
goingboeing737's Avatar
 
Join Date: Dec 2002
Location: Houston,Tx. Texas GreaseSlingers
Posts: 949
Likes: 0
Received 0 Likes on 0 Posts
Default

The mounting block seems solid as a rock. I took out the shim/washer and went back to the exact way it was configured before.

Just swapped out DME relay. Still no start.

Guess I will try and adjust the mounting block today.

This is a real low point. I have no confidence in this POS ever getting me to and from where I want to go without breaking down.
Old 09-19-2003, 01:58 PM
  #24  
PeteL
Got Nothin'
Rennlist Member
 
PeteL's Avatar
 
Join Date: May 2002
Location: Tampa, FL
Posts: 4,977
Received 6 Likes on 3 Posts
Default

I still think there is an issue with the DME itself. A loose connection/bad solder. If it failing when it hits a bump, the flaky connection goes bad, and the vehicle becomes a monument to German Engineering.
Old 09-19-2003, 09:49 PM
  #25  
quinnfiske
Pro
 
quinnfiske's Avatar
 
Join Date: Jul 2003
Location: Waukesha Wisconsin
Posts: 551
Likes: 0
Received 0 Likes on 0 Posts
Default

My car is still acting the same way. I have moved on to the DME itself. I sent it to a guy in California who is set up to do functional testing on these gizmo's. He told me he found a problem is the section devoted to ignition timing. He is sending it back and I will report the results here.

To see if your problem is the same, take a timing light and shine it into the inspection hole next to the distributor cap. With the engine at idle the cam pulley will look stationary. If it looks like it is moving back and forth, th etiming is changing. My timing was wandering all over the place until it retarded and the engine died.



Quick Reply: Speed sensor removal - - I'm confused ?



All times are GMT -3. The time now is 06:28 PM.