924Board.org

eugenechris · Joined: 13 May 2008 Posts: 34 Location: oregon

ok i had a hot start problem before i got that fixed i have had no problems with it for a few months

now my car has died a few times right after i start it and drive a few blocks i pushed to side of road and then it started right back up let it warm up and still did it. the last time it died and will not start back up. ran some test and so far this is what i got

no spark ok grounded coil out and and have spark
so its not my coil or any thing after that.

checked the two sensors in the back when the car is on im getting 2 volts on one post and 3 on the other post its the same for both wires coming from my ecu to the sensors i not sure if that is what i should be getting

tested the resistence to the the sensors i am getting 988 on one and 982 on the other. seems to be good.

i checked all fluids and fuses. any ideas guys last time we got it going thanks to the help i received on here.

and its a porsche 924s 1987 i washed it to and that did not help lol thanks for all the help chris
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org. black 1987 porsche 924s

John_AZ · Posted: Wed Oct 29, 2008 11:32 pm Post subject:

Have you tried your spare DME relay? Can you tell if the fuel pump operates with the key in key pressed to the "start" position?

GL
John_AZ
1988 924S + 1987 924S

eugenechris · Joined: 13 May 2008 Posts: 34 Location: oregon

no i have not tryied the dem i pulled a fuel line going to the injectors and tryied to start it ya it was getting lots of gas it went all over the place lol could the dem cause the car not to send a single to the coil?
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org. black 1987 porsche 924s

John_AZ · Posted: Thu Oct 30, 2008 6:13 am Post subject:

DME information:
http://www.clarks-garage.com/shop-manual/fuel-05.htm

John_AZ

eugenechris · Joined: 13 May 2008 Posts: 34 Location: oregon

and where is the dme relay i have been looking on line and can not seem to find out exctly where it is
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org. black 1987 porsche 924s

eugenechris · Joined: 13 May 2008 Posts: 34 Location: oregon

ok i was under the dash messing around found two relays one radio i not sure what the other one was but it was small. after looking i tryied to start the car and it started must be the relay under there some where i unpluged the two and the car still started. so they are not the right one. i am still looking im going to order the book for the car and a dme relay so if some one can point me where it might be that would be great thanks chris

after looking looks like the fuel pump relay and dme relay are the same thing in the same location i do know where that is i will pull mine and check it
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org. black 1987 porsche 924s

eugenechris · Joined: 13 May 2008 Posts: 34 Location: oregon

ok i pulled it out looked in side all looks well lol. i need to fine the one i baught its around some where lol could this really be it i am scared to drive the car and have it break down further away from home.
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org. black 1987 porsche 924s

firemn131 · Joined: 16 Jul 2008 Posts: 57 Location: Lusby, maryland

I had a similar issue. Below is a previous post with the relay positions.

I can't really be any help. My car fixed itself. Although someone suggested the ignition switch in reference to another issue{radio sporadic} i jiggle the key and the radio came to life. So maybe I have a bad ign. switch and it also bleeds problems to the start issue.

Good luck.
John
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Top Row of Relays is Row #1, relays are number from left to right #1, #2, #3, #4, #5, #6.

Bottom Row Of Relays is Row #2, relays are numbered from left to right, #7, #8, #9, #10, #11, #12

In my car, Top Row: Relay #1 is the AC Relay. I have verified that the contacts in the socket match the AC relay. The contact locations in the socket do not match the Cooling Fan Relay that the books say is supposed to be installed here.

Top Row Relay #2 is the DME relay.

Top Row Relay #3 appears to be the Cooling Fan Relay. It has a large #24 printed on the top. It is a 171.XXX.XXX part number that is the same as that plugged in as relay #6, but this number does not match teh parts books as a replacement.

Top Row Relay #4 is the Buzzer/Chime Relay (this one works, so the correct relay must be installed. The Books say that this location should be empty, or it should be the Headlight Washer Relay.

Top Row Location #5 is empty. The books show this should be the Buzzer/Chime Relay Location.

Top Row Relay #6 appears to be the Rear Glass Defroster. The relay has a large number #24 printed on the top. The part number starts with 171.XXX.XXX. This is not the correct part number from the books that I have.

Bottom Row #7 is bypassed per the books.

Bottom Row #8 is empty (books show this as being the Driving Light relay location, if you have driving lights).

Bottom Row #9 is empty (books show that this is supposed to be the Horn Relay). I forgot to try the horn while I had a battery installed, but without the relay, even if this is the horn relay socket, the horn would not have worked.

Bottom Row #10 is empty (books show this socket should be the location of the intermittent wiper relay).

Bottom Row relay #11 has a flasher relay installed, but the turn signals do not work (the indicator on the dashboard is blinking very rapidly when the turnsignals are flipped, but no lights work). The installed relay has the correct number on it, but it is also marked with the number "21" on the top.

So my questions are: Are the 171.XXX.XXX relays the correct ones for the locations that they are installed in (#3 & #6)?

Is Bottom Row relay location #9 the correct place to install the horn relay?

Is Bottom Row relay location #10 the correct place to install the intermittent wiper relay?
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1987 924S Daily driver 64 miles each way to work.
2001 F-150 my back up
1970 Mercury Cougar XR7 The Muscle.

eugenechris · Joined: 13 May 2008 Posts: 34 Location: oregon

ya my car fixed it self i do think its the relay i opened it up and all seems ok. i ordered another one when it gives me problems again i will just switch it out and if it works then i know what my problem was
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org. black 1987 porsche 924s

eugenechris · Joined: 13 May 2008 Posts: 34 Location: oregon

it happened again at a stop light so i look on my passenger flour my flash light and everything is all wet its been raining allot so i feel under where my relays are and every thing is wet. i pop the hood and the area where my battery is and all the way accross had about 5 inches of water in it the drains on both sides were cloged with leaves so i think every time when i stop or go that watter would go into where my wires are and fuses and relays. that could be bad cleaned it all out now thinking about putting a screen over that area to keep the leaves out and resealing up where my wires enter the car any sugestions on what to use.the car is still doing it some times will die then start back up. i think i just need to let things dry out under my dash and every thing should be OK. i hope.
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org. black 1987 porsche 924s

eugenechris · Joined: 13 May 2008 Posts: 34 Location: oregon

ok i changed the relay still having problems it will die a few times when i first go out and start it maybe two or three times then it runs fine . once it died while i was driveing let set for a few seconds started right back up any ideas what to check next.
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org. black 1987 porsche 924s

firemn131 · Joined: 16 Jul 2008 Posts: 57 Location: Lusby, maryland

Not much help from my end.
Mine has healed itself, for now.
Possibly
ignition switch,
bad ground

was the moon Full?

Sorry I couldn't be of more if any help.
John
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1987 924S Daily driver 64 miles each way to work.
2001 F-150 my back up
1970 Mercury Cougar XR7 The Muscle.

Smoothie · Posted: Sun Nov 16, 2008 4:27 am Post subject:

Likely multiple intermittant problems caused by the battery tray leak leaking water onto the fuse-relay panel. The fix starts with rebuilding the battery tray area to repair the leak.
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"..it's made in Germany. You know the Germans always make good stuff."

'82 924T, US version, dark green metallic, 5 speed Audi 016G gearbox

eugenechris · Joined: 13 May 2008 Posts: 34 Location: oregon

i have the leak fix the drain holes were just clogged up. i still have running problems it will just die usually within the first ten minutes of driving. seems to loose power or gas if i press the gas peddle to the floor will not change nothing still dies let it sit one two minutes starts right up. when it dies if i try to start it right back up seems to almost start but not all the way i am going to buy some starter fluid and see if that works if it does then i can guess a bad fuel filter or bad fuel pump. i am thinking the fuel pump but can not be 100% its getting gas every time i check it. any ideas

or and i do not know if this has anything to do with it but after i drive for awhile if i let the car sit it starts to idle high almost at 2000 rpm normally its about 1000 i not sure if this is a diffrent issue. i could always just turn it down some
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org. black 1987 porsche 924s

eugenechris · Joined: 13 May 2008 Posts: 34 Location: oregon

died on the way to work to day about 20 min late for work i stoped to buy some starter fluid came back out and nothing. first i spray the starter fluid in and nothing pulled a fuel line lots of gas. shake the dme relay nothing i just put that one in. hit the motronic box with a screwdriver and then it started could be something else. or just got lucky that time. i will order one off ebay there is the same one on there now for $200. hope thats it.
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org. black 1987 porsche 924s