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924sjoshawa · Joined: 19 Jan 2010 Posts: 12 Location: springfield, IL

k i have checked for spark its there. i have tryed and tryd to start evey once in awhile it starts were talkin 1 in 200 maybe. i checked for fuel with dme relay didnt seem to be any. i jumped dme relay and wa la fuel! still no start tho. i dont know whitch dme relay to get. it is a 87 924s

Rasta Monsta · Joined: 12 Jul 2006 Posts: 11733 Location: PacNW

How many miles on your motor? Did you buy it non-running, or did this problem just develop? How do the plastic plugs for the speed/reference sensors look?

DME relay is pretty generic, you should be able to get one for $30 or so.
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Toofah King Bad

WeiBe (1987 924S 2.5t) - 931 S3

joecitizennn · Joined: 12 Sep 2005 Posts: 2096 Location: no mans land

I have piles of relays and sensors at my house to check the car with. I live close to you. Have you ever had the car running at all?

924sjoshawa · Joined: 19 Jan 2010 Posts: 12 Location: springfield, IL

yes it ran fine. i had been driving it for about 6 weeks then became hard to start. now wont start at all. that would be awsome if you could help me joe. i dont realy have alot of money right now im getting ready to leave for basic training. but would love to buy a couple relays and sensors from you if posible. it says 72k but it dosnt work. po told me it had foes done 3k miles back but im gonna read into it and do it agin to be safe.

masterdave · Joined: 10 Dec 2008 Posts: 183 Location: Harrison NY

sounds like a relay issue, i had the same issue about 3 months ago and it turned out that some one had connected an extra wire to the live connection on the fuel pump inadvertently drawing current from it, this caused the pump to not work so well when the relay was in but fine when i jumped it. Get under the passenger side behind the rear wheel you will see the pump. take the connectors off, one per connection, and clean with a wire brush, you may just have an intermittent connection. Its a quick check and could solve a lot of issues.

Mav666 · Joined: 16 May 2008 Posts: 47 Location: Newcastle, UK

Always worth checking the reference sensor as well

joecitizennn · Joined: 12 Sep 2005 Posts: 2096 Location: no mans land

just a crazy thought, unplug the electrical connector to your number one injector and see if the car will stay running at a rough idle.

924sjoshawa · Joined: 19 Jan 2010 Posts: 12 Location: springfield, IL

naw it wont start that way. i think its the relay or maybe a ref sensor

Grenadiers · Posted: Tue Mar 02, 2010 6:16 am Post subject:

Have you pulled the cap to check it and the rotor? My previous S did a slow death on starting, took forever, and turned out to be said parts.
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'83 944 Track car.
'88 924S Track car.
'89 944 Turbo
2004 Winnebago Vectra monster RV
2012 Jeep Wrangler
2014 Kia Soul
2001 Ford F350 powerstroke

Mav666 · Joined: 16 May 2008 Posts: 47 Location: Newcastle, UK

Have a look at Clarks it explain how to do a quick multi meter check of the ref. sensors.

They're not cheap and hard to come by 2nd hand but if you find that the BG one is duff then that will be your problem, its the BG thats the one that sends the signal to the ECU.

If the DG one is good they so long as you can get them out you can swap them over.

Failing that as its been said try and get hold of a spare DME and try that.

GL

skytrooper · Joined: 29 Aug 2007 Posts: 461 Location: Canandaigua, NY

I had a very similar problem with my "83 944 last fall. I tried everything, but the reference sensor. Once I changed it out...she started right up and has ever since. Do your research...if you buy the BMW sensor it will save you a lot of dough

BMW part number is 12-14-1-708-619

German Auto parts has them for 66.07 + s/h (look it up under BMW 633i)

or you could go to Pelican parts and get the Porsche one (no difference) for 168.25...it is your call
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Matt

1987 - 924S "Black Pearl"
1982 - BMW 633CSi
1984 - BMW 528e
1983 - 944 N/A "Blue Max" (Gone)
1981 - 931 "Scarlet Harlot" (Gone)
1976 911S Targa (Gone)