95 993 just will NOT start. NEED HELP PLEASE

imprezkid · 12-29-2005, 08:12 PM

ITs a 1995 993 c2. left it sit for a long time in garage, went out to start it, wouldnt start. Ended up ordering new fuel pump and DME relay, installed, STARTED. thought that was it was so happy. Went out a couple of days later didnt start. all this time it has been turning over but not even a sputter. So didnt know what to do other than order another DME, or 3 just to be safe. Put it in, still nothing, not even a sputter. Has alarm but is in valet mode so this shouldnt be the problem.

Things checked:
all fuses
**fuel pump will not run with dme relay in place but will run when u just through terminal 3 and 7.**

Possiblility questions:
Did these cars have any problems with factory alarms or "shut down?" switches?

Could it be the DME control unit.

PLEASE HELP ITS BEEN SO LONG SINCE I HEARD MY PORSCHE, IM HAVING MAJOR WITHDRAWS

rcwaldo · 12-30-2005, 06:20 AM

From memory, the fuel pump wont run until DME sees a starting signal, in other words, the pump wont run and run with just the key on, engine off.

Is your battery strong enough to spin the engine fast enough to start? Wiggle the new DME relay in its socket some to make sure the connection is good.

Otherwise, it may be your alarm that is acting up. I presume its an aftermarket alarm? Why is it in valet mode?

imprezkid · 12-30-2005, 05:07 PM

Thanks. Yes it is a aftermarket clifford alarm system, i put it in valet mode so i could be sure that nothing was being triggered, i have put now put it back to regular operation mode, but still no go. I will buy a good battery and check it again but i think its good.

Thanks again
Tanner

AFJuvat · 12-31-2005, 01:39 PM

Did you put a new DME relay in the car?

AFJ

RRRR · 12-31-2005, 03:49 PM

I have a 95 w/ a clifford Alarm also.
I had your problem, I feel your pain.
Here is what happened in my case. Battery drained, opened the doors with my keys w/ a dead battery bypassing the alarm. The starter kill activated. After trying to reset the factory kill switch for hours unnecessarily, all I had to do is lock the car back up and go back in by unlocking the alarm system and doors with the Cliffod remote, therefore disabling the starter kill and "Voila" I was reunited with the thrill of driving this unbelievably sweet dream mobile.
I hope your problem turns out to be is as simple as mine was.

imprezkid · 01-02-2006, 12:16 PM

that could definitly be the problem, thanks. still open to others though!!!

imprezkid · 01-14-2006, 12:31 PM

bump

AFJuvat · 01-14-2006, 05:50 PM

Ok, back to basics - you had a car sitting for a long time, no start, you changed the DME relay and the fuel pump, then the car started. Now it won't.

Have you removed the fuel from the tank and cleaned out the lines?

I'm betting you have a seized fuel pump.

imprezkid · 01-18-2006, 10:23 AM

yeah i definitly check, and again last night (premium really burns

) and its getting fuel all the way back. And it still didnt run i cleaned out filter and everything, its got fuel, well almost. We decided to spay some starter fluid through the filter, being VERY carefull, and its started to sputter which is more than we've got in the past. So really it has the fuel its just not pumping it, and ive got under it and felt the fuel pump when trying to turn it over, and it wasnt pumping. With the fuel pump relay jumper it the pump does run though.

So my question is whats my problem. Is it the factory immobilzer? I believe the clifford is working in normal mode, and has no lights confirming alarm immoblization!

THe factory immoblizer is the only thing i can think of it being, esspically since it trys to start when starter fluid is applied. Could it be DME, idk? it has new relays. ?????????????????????????????????????????????????? ?????????????????????????????????????????????????? ?????????????????????????????????????????????????? ??????????????????????

stevepaa · 01-18-2006, 11:31 AM

Any way to bypass/jump the clifford kill connection? Just get it out of the equation. The only time I had similar issues and it was alarm related.

markt930 · 01-19-2006, 07:54 AM

Does your car run at all? I am having a problem with my 1995 also. I got the car to start by disconnecting the battery overnight and then locking and unlocking the door twice. The problem is the car still seems to be in immobilizer mode and it dies after about a minute. I understand there is a fuel immobilizer in those cars, according to a Porsche dealer. Anyone know of a way to fix that or bypass?

Don Plumley · Don Plumley's Garage

I don't know the difference between the 96+ OBDII driveblock (immobilser) versus the 95 system. In mine, a dead or drained battery prevents the drive block from de-arming. After recharging the battery it worked fine.

I believe the drive block can be deactivated through ECU reprogramming. For example, if I send my DME to Steve at Rennsport, he could deactivate the drive block upon request when reprogramming the ECU. I don't know if this can be done at the chip level on the 95.

In regards to Imprez's problem, the aftermarket alarm is always a chief suspect after a battery drain. As others have said, I highly recommend removing it before throwing money and time at relays, etc.

Have you locked/unlocked the car? In my 96, the engine will not start unless the factory remote is used to deactivate the drive block. Don't know about 95's though.

The car drove fine until sitting in a garage. You've changed the fuel pump, fuel filter, confirmed fuel flow. Unless there is water damage (look under your seat), the DME just does not decide not to work. Same with the factory immobilizer. Assuming you have charged or changed the battery, lock and unlock the car a couple of times.

Just my $0.02...

RRRR · 01-21-2006, 12:54 AM

Remember, if your issue is the same as mine was, I have the same car / alarm combo. Try to do what I suggested to you earlier again. Once you have a charge on the battery Lock the car and get back in by unlocking the car with the Clifford alarm. I had to do this in the right order a couple of times before it worked. If this does not do it, you will have to deal with the factory alarm, it has a starter kill that has a simple binary switch below the Dash on the side plastic to the driver side. It is much more complicated to disarm once it is engaged. It works with a binary code, you will have to look for the code in the owner’s manual or the dealer will have it. Then you will have to follow some pain in the neck instructions. I got the instruction from the local Porsche Dealer Service department.

Good Luck

ANTONIO · 01-28-2006, 03:48 AM

Seems that you got a bad pump,cheers,Antonio.

imprezkid · 05-14-2007, 07:16 PM

So over a year later and the car does still not run. Same problem, spark plug wire pulled tonight, spark plug put in, grounded, turned over engine, NO SPARK. Like stated previously have new dme relay in it, car sounds ready to start just not firing over. not even a sputter. All door unlocking re-locking, batteries charged.

So whats the simple thing causing this thing not to fire?

rboylan · 05-19-2007, 04:18 AM

I own a '96 that sat for about 1.5 years before I ran into the same exact misery. No clifford alarm, just the factory immobilizer. After changing the pulse sender 99660610500(supercedes 993 part, additional plug needed), DME relay, fuse box, immobilizer box, blah blah blah,and all related items............NOTHING.

Last week I brought the vehicle into Hennessy Porsche here in Atlanta to have the the electrical system reviewed with a "Pin Out'' box which evaluates each and every line with the DME harness for value and correctness during all parts of the starting and running process. The determination was made that the fuel pump in my '96 was drawing excessive voltage causing shutdown of the DME. I'm hoping and praying for good news on Monday.

For your misery I would check the pulse sender. It seems all other items have been addressed from a plug and pray:-) perspective. I'll get you and update when I get mine back. Best of luck with it......and remember you are not alone by a long shot., Cheers.

Groesbeck Hurricane · 05-19-2007, 09:07 AM

Please do not take this badly, but if after a year you have been unsuccessful and have tried all the above suggestions I would suggest finding a Professional. It is likely a very inexpensive fix but one that has escaped everyone.

Have you checked to see if both your rotors move with then engine? Checked the ignition? There are numerous "little" things that could be the end cause and not all are common.

imprezkid · 07-11-2007, 07:23 PM

So we recently took the car to a local mechanic that works on cars of the foreign nature, they removed the security system with no positive out come, besides it was ruled out. They came to the conclusion that they dont know what the problem is but they get weird readings when testing volts out of the dme motronic control, so they dont know what the problem is but that is there guess.

Is there anywhere the unit can be sent to be checked and if bad rebuild, as it would be really expensive to just buy one and figure out that its not the problem?

After all this, can the factory imobilzer be doing all this?

thanks a ton guys

imprezkid · 07-11-2007, 07:26 PM

also is there any meaning to when turning the car over the gear indicator lights flash, and what is the ! light and button mean

rboylan · 07-12-2007, 05:28 AM

Otto's in Venice can test the unit and determine whether the DME is functioning properly. There is a cost but it did help. Also a Porsche dealer can get a test unit from Porsche Training to determine if it is functioning correctly, cavaet there being you have to bring the car to the dealer for service.

In the end although my fuel pump was shot, it turned out to be the Pulse Sender was the culprit. If you'd like to chat, drop me a PM with your number and I'll give you a ring. Best of luck.

Rich