Question about 1986 Porsche 944

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I`ve a 1986 porsche 944 turbo.i`ve replaced both crankshaft sensors,dissy cap and DME relay as it would not start.now the car does start but not very well,chucking out black smoke,hesitates when you press accelerater,then stops all together,but does start straight away.also where the crank shaft sensors sit(back of engine near clutch housing,theres another sensor which was out of its hole now put back in.am i right in saying that it`s the timing sensor!anyway could you help as i`m running out of ideas.thankyou, mr tracey

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To me could be a gasket problem if you are blowing smoke when applying gas. just a suggestion. have you checked the oil? to see if milky? keep me informed please. Thanks.

Posted on Oct 29, 2010

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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

1986 porche 944 turbo has no spark coil is fine and ran a jumper wire from the battery to the coil still didnt get any spark


hello there
it is possible that you need DME control relay.It costs about 20$

proporsche

Feb 18, 2013 | 1986 Porsche 944

1 Answer

Where is the dme relay on a 1985 Porsche 944


DME relay sorry this is a new one on me please explain

Mar 23, 2012 | 1985 Porsche 944

1 Answer

No spark on 84 944 porsche new plugs wires cap rotor ignition coil dme tested good havnt checked dme relay just gonna replace it found many others have same problem and it turns out to be crankshaft sensor...


It is not hard to change. They are usually located on the bottom back of the engine. I have had cars that didn't spark and the crank solved everything. Others, it didn't work. Don't know why, guess it all depends on the computer reading it all. Your ECM controls all the ignition comonents and timing. Have you tried putting in another? Sometimes, if it doesn't read the crank, it will shut down the spark. Some do, some don't. Can't be 100% sure but it has worked before. I usually tell people to go to a junkyard when they have no spark and have been trying to fix it for some time. Get all the parts you need for cheap. A bad cam sensor can cause no spark and the distributor itself.

Feb 10, 2011 | 1984 Porsche 944

1 Answer

86 porsche 944, starts n runs, while driving at higher rpms, car cuts right off, i start it back up n it runs funky, now last time it did it i pulled dme relay, and puty it right back in and the car ran...


I would buy a used one if you can (dme chip). Have you cleaned the fuel injectors? one could be faulty and could be a coincidence about the car working better after taking the relay out and putting back in. could be a bad cpu also. would love to hear what happened if you get it fixed. good luck

Aug 07, 2010 | 1986 Porsche 944

2 Answers

1094 944 porsche cranks but wont fire. fuel pump has no power to it. i changed the ignition. still nothing. could it be the factory alarm.please help.


run a fused wire from the positive side of your fuel pump to your "on" side of your ignition switch bypassing the alarm kill switch and, allowing you to drive the car

Jun 09, 2009 | 1984 Porsche 944

1 Answer

944 cuts off after 5 min.


Sounds like fuel relay located in fuse/relay box. This is a common problem on the 944, always good idea to carry a spare.
Todd

Feb 11, 2009 | 1986 Porsche 944

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