83na944

Check the ignition switch

ILOVEMY944

the fuel is good i just filled up the day before. the car kinda just shut off on me when i was driving down the road. yes checked TDC wit the cam markings and everything checks out fine new timing bout 8,000 miles ago. ignition switch has a little crack in it and i will be replacing it soon. ne input is helpful thanks every 1!!
Bryan

ILOVEMY944

i also replace the fuel pump relay didnt work so i bought another 1 just to make sure but thats not it. just wanted to mention that.

porshaowner

i know 944cs lives near you and he is very knowledgable about 944's. You should try and find him and see if he can help you.

porshaowner

did you try and see if it will start on starting fluid?

ibkevin

One of the three is not right, with fuel and spark and valve timing you get a bang, are you testing each properly? Like fuel resistance to flow creates pressure? Maybe the water mist at night spark dance check?

Still sounds like a simple electrical connection failed in the ignition or fuel delivery systems. Concentrate on areas that have been exposed to the elements.

ILOVEMY944

yes i tried starting fluid..no luck. feul pressure is fine and ive checked the output of fuel out of the rail and that checks out...spark seems to be there. yea ive tested everything at least 3 times and my dad who works at a german garage helps me and he cant figure it out either. how would i do that spark dance check? never really heard of that? im sure it has to be electrical or ignition. thanks!
Bryan

24stiffy

If it died suddenly, I would look at fuses, coil, and uhhhh, hate to say it....your DME.
Sudden death as opposed to sputtering, in my experience, means something on the electrical side.
Look for a known good DME and give it at go...
Good luck...

porshaowner

would he still have fuel and spark if the dme was bad?

ILOVEMY944

replaced all fuses and cleaned the back of the fuse box. checked the coil and is up to specs. havnt tried the DME but i asked a person who works on porsches for a living (Phils Automotive) and he said its so rare for the computer to go he told me to wait till the last possible thing to try that cuz he said i should have spark or fuel then if it went bad.

ILOVEMY944

shouldnt*******have spark or fuel sorry bout that

michaelathome

Long shot but if you have played with all of the above things did you ever disconnect BOTH the speed and ref sensors at the same time? Maybe you got them reversed when plugging them back in? It happend to me and I got the same symptoms that you are describing.

Michael

ILOVEMY944

um yeah i played wit them and one time i did put them on backwards and i got no spark at all...i quickly retraced my steps and put them back the other way and then i had spark. so i think those 2 things r good. thanks
Bryan

ILOVEMY944

thanks every 1 for your input on my problem i just want to get it solved. its been 2 weeks now and i really wanna drive my car!! i love driving it such a blast. thanks again!!
Bryan

michaelathome

OK, I did a quick review for ya:

Things you have checked:
- I have spark (is the wire order correct after all the testing?)
- I have fuel at the injectors (what is the pressure at the rail?)
- perfect compression (what is your compression on all 4?)
- perfect fuel pressure (see above)
- checked AFM (How about the J-Boot and all associated vacum hoses?)
- Checked TPS
- Timing is perfect
- ignition is ok (Turn the key and hear the pump?)
- checked the speed and reference sensors
- injectors are getting voltage (what is it?)
- i've checked engine grounds (R/R them and cleaned them?)
- checked TDC wit the cam markings (how about flywheel mark?
- i also replace the fuel pump relay
- replaced all fuses
- cleaned the back of the fuse box

Are you getting flooding of/in your engine? If after cranking and cranking have you pulled a plug and checked to see if it was wet with fuel?

Also please post the year of your car when you get a chance. It could make a difference.

Michael