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Join Date: Aug 2016
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I am out of ideas!! Please help!!!

Ok I have a 1987 944s with 129,000 on the OD. First I will start with all the parts on the overall resently. All new full injectors, new spark plugs, new spark plug wires, new rotor, new starter, new fuel pump, new clutch, new water pump, new battery, and a new voltage regulater. The battery, starting, and charging system all checked out good.
Now the problem the past three weeks it has happened twice that the car starts and runs for about 5min then dies and won't start again with out a jump I'm thinking its a fuel delevery problem I order a new fuel filter just incase its clogged but it there anything else I should look at? The over haul was done at 122,000. Thanks in advanced.
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1987 944s
Old 08-23-2016, 05:42 AM
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Well there a multiple instant.. "Ideals"... that come to my old mind...?
1) DME is getting hot and breaking down...?
2) Battery is going bad...? Take to Autozone and have it checked?
3) Eng. Battery cables + & or - is shorting out or the connections are not good at the battery and eng.?
4) Cold Start Valve - ?
5) Fuel Pressure Reg. is going bad?
6) TPS is bad?
7) Distributor Coil is going bad?
8) Are u getting spark & fuel? (Spray Starting fuel in the inlet when it doesn't wont to start) / (Check for spark with a Multi-Meter- on the 50 VDC Scale)
(Sound like and smells like... definitely a elec. problem?)
Good luck,
Ron...
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951
Old 08-23-2016, 06:48 AM
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Battery is good so are the cables. I I'am getting a spark and the distributor coil is new. I drove it about 50miles yesterday after replacing the voltage regulater and it drove perfectly, got in it today started just fine but after about a minute it started to idile a bet rough and then shortly after died tried to start it again it would crank but wouldn't start.
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1987 944s
Old 08-23-2016, 08:20 AM
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Where is the DEM and relay located?
Could it be the seed reference sensor?
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1987 944s
Old 08-23-2016, 08:26 AM
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Pull the dme out... the (3) large plug prongs are the ones that gives the eng. spark and fuel... make up a (3) wire pig tail connector - (3) wires tied together at one end and (3) wires separate at the other end... then plug the (3) separate wires into the (3) large female connectors in the dme slots... this by passes the dme relay and gives your eng. fuel and spark all the time... start the car if it runs ok and doesn't die on u then the dme is bad ... buy a new one $35... not a used one... OEM Porsche only!
Ron...
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Old 08-23-2016, 08:37 AM
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Woops... the dme is in the fusebox... look at the fuse & relay chart and numbered locations on the inside of the fuse box cover.
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Old 08-23-2016, 08:40 AM
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Correction to RRR's post " start the car if it runs ok and doesn't die on u then the dme RELAY is bad ..."
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87 944N/A since 1992
87 944S - Near Future Engine Project Car
88 944S - Current Project
84 928S - Restoration Project
Old 08-23-2016, 09:08 AM
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Tks... dgcantrell... when I get in a hurry that's what happens when u type like I do... hunt and peck!
Ron...
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Old 08-23-2016, 10:37 AM
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All of us should carry a spare DME relay... And a heater control valve if it's a 968....
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Old 08-23-2016, 05:35 PM
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I did the bypass and it started right up but was making a good amount of engine noise I'am assuming that will go away once it get a real relay in there it should be here by Friday. Hopefully now on the find out why it is leaking oil..this is never ending
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1987 944s
Old 08-23-2016, 07:23 PM
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I'd check the belt. If you haven't replaced it- do it. DME bypass will not increase "engine noise"
Old 08-24-2016, 03:47 AM
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What kind of "engine noise"? Like kipvan says, the DME bypass will not change anything regarding noises from the engine. Check the oil and coolant and make sure you don't have them starting to mix (foamy grey gunk in either system) from an oil cooler seal failure.
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88 944S - Current Project
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Old 08-24-2016, 03:59 AM
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Just seemed to miss and cause a rattle sound but that could have been cause I didn't have the wires in enough I guess...the coolant and oil is not mixing oil level is staying the same the coolant is fine as well the leak that's under my car is probably power steering fluid cause it was about empty...the belts have been changed and serviced about 3 months ago or 1,500 miles and are is great shape as far as I can tell but like a said I drove the car about 50 miles the day before yesterday and it ran perfectly. So I don't know
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1987 944s
Old 08-24-2016, 02:03 PM
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you should buy my 944S and just swap it in. problem solved!... jk good luck, these issues can drive a man nuts.
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-1988 BMW 325i= the Daily with J-Stock suspension & SSRs
-1968 Datsun 2000 Fairlady Roadster = Weekend / VARA Toy
Old 08-24-2016, 02:12 PM
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Haha I think if I was going to do a engine swap I want to upgrade to the turbo s motor 247hp sounds like a little more fun then the 187hp na motor I have now.
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1987 944s
Old 08-25-2016, 08:12 AM
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Update. I replaced the fuel relay and the car works flawlessly. The oil leak turned out to be the power steering fluid, and the knocking sound I am guessing was just a dry start. Haven't heard it since. Thank you for all the help!
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1987 944s
Old 09-06-2016, 07:11 AM
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