Question about 1986 Porsche 944

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Porsche 944 turbo won't start, have replaced DME and fuel pump, starter turns, engine won't catch

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Posted on Jan 02, 2017

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SOURCE: 944 fuel problems

If the fuel pressure regulator is stuck there will be to much pressure to the injectors and the injectors won't open, and thus no start. Since you relived the pressure by lossening the cap the engine ran.

Posted on May 08, 2009

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SOURCE: 1983 porsche 944 runs for 10-15 min then stalls

get an alternator test

Posted on Feb 21, 2010

  • 3 Answers

SOURCE: 1983 porsche 944 starts and runs fine for a couple

could be just a sencor on the way out

Posted on Apr 06, 2010

  • 34 Answers

SOURCE: '84 porsche 944 cranks, chokes and dies

check your air filter sounds like it is starved for air possibly

Posted on Apr 06, 2010

alicantecoli
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SOURCE: my 1998 porsche 993 wont start. replaced dme

its only a vw ,check the crank sensor and the ignition module

Posted on Jul 09, 2010

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5 Answers

Does a 1983 porsche 944 2.5L have a fuel shut off switch if so where is it located


I would jump the fuel pump relay first. If it starts replace the relay. Or fix it. Bad diode in it. $50 compared to 50 cents. Done many of them.

Aug 08, 2016 | 1983 Porsche 944

1 Answer

On 84 porsche 944 can the side key hole factory alarm cause the whole ecu and fuel pump, DME relay to disable and the engine to not start?


Yes, that is what the immobiliser does. The chip in the key and the chip in the lock let the ECM know that is ok to provide power to the ignition and fuel pump.

Jan 27, 2016 | Porsche Cars & Trucks

1 Answer

84 porsche 944 replaced new spark plugs and wires,cap,rotor,coil,emc,DME relay,fuel pump, reference speed sensors, new battery, and still no start. Any suggestions is what to do next?


Not much left unchanged is there and no doubt you have done compression testing on all 4 cylinders as well. (If not you need to). I assume it is cranking over normally with the starter motor but not firing.

I would try one of the Porsche Owners Forums for this as one of the other 944 owners there should be able to help..... Like this one..................

Porsche 924 944 968 Technical Forum Pelican Parts Technical BBS

Jan 24, 2016 | Porsche Cars & Trucks

1 Answer

Cranks over. But wont start.


Pull the injectors and have them tested for electronic continuity and spray pattern as the needle may be rusted up or the coils in the injectors corroded away for the long period of no use. Regardless of what engine you have if you have spark at the correct time --compression --fuel then you must have go in the engine . Continuing to run will depend on the make and design as the other variables come into play.

Nov 16, 2013 | 1986 Porsche 944

1 Answer

Where is the DME on a porshe 911 1986 my cat turnes over but wont start - could it be the DME


that sounds like a fuel pump or fuel line blocked bro. good luck. doubt the dme

Jul 17, 2010 | 1986 Porsche 944

1 Answer

1986 944 Turbo wont start.Just died on me going around corner,will start with starting fluid.


It sounds like you don't have sufficient fuel.
Do you hear the fuel pump turned on when you put the key on?
If it is not, need to check the fuel pump relay.
Jump wire at the fuel pump relay to to turn it on to see if Fuel pump is working
Need to check if the fuel delivered to fuel distributor in spec.
Jump wire your relay 60s to check how much gas delivered to the fuel distributor, by disconnecting the gas input at fuel distributor and catching fuel in a calibrated glass container. The gas quantity ml divided by 60 sec to have a flow ml/s. If this is not meeting spec then change the fuel pump. Good luck.

Jul 18, 2009 | 1986 Porsche 944

1 Answer

944 fuel problems


If the fuel pressure regulator is stuck there will be to much pressure to the injectors and the injectors won't open, and thus no start. Since you relived the pressure by lossening the cap the engine ran.

Feb 26, 2009 | 1986 Porsche 944

2 Answers

Car wont start .


You will not be able to hear the fuel pump on that model. First you have to determine if you get fuel and have spark. If it is a fuel problem, replace the DME relay first. Very common. They act up and fail without warning. Part is cheap and located in the fuse box. Next would be the fuel pump.
If it is spark related it may be the Flywheel Reference Sensors. There are two and the cost about $100 each.

Good Luck.

Jan 10, 2009 | 1987 Porsche 944

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