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RIPDOTCOM · Posted: Thu Aug 24, 2006 8:04 am Post subject: Help, no injector pulse

I have plenty of fuel pressure, I have a tach signal but the car wont start, I get no injector pulse, i can spray starter fluid in the intake and it fires right up on 1/2 a crank but cant seem to get it going. THe resistance on the DME relay is 1 without power and .6 with power. I am going to try the jumper trick tonite but I dont think its going to work. Hopefully the DME is not bad but if it is I have a 28 pin EPROM. Will an ECU with a 24 pin work?

Paul · Posted: Thu Aug 24, 2006 9:33 am Post subject:

Pull the connector on one of the injectors and try to start it with the 3 remaining ones.
_________________
White 87 924S "Ghost"
Silver 98 986 3.6l 320 HP "Frank N Stein"
White 01 986 "Christine"
Polar Silver 02 996TT. "Turbo"
Owned and repaired 924s since 1977
Porsche: It's not driving, it's therapy.

RIPDOTCOM · Posted: Thu Aug 24, 2006 9:42 am Post subject:

Tried that already, didnt work. We have 12v at the injector but no pulse and when we crank the engine voltage drops to 0v at injector.

Paul · Posted: Thu Aug 24, 2006 9:48 am Post subject:

Have you unplugged the DME connector and checked for corrosion yet?
_________________
White 87 924S "Ghost"
Silver 98 986 3.6l 320 HP "Frank N Stein"
White 01 986 "Christine"
Polar Silver 02 996TT. "Turbo"
Owned and repaired 924s since 1977
Porsche: It's not driving, it's therapy.

RIPDOTCOM · Posted: Thu Aug 24, 2006 9:55 am Post subject:

Yes I have, looks pretty clean. I might also add that I am getting a tach signal

Paul · Posted: Thu Aug 24, 2006 9:59 am Post subject:

I need to find my DME diagram to see what pin(s) provide the injector pulse.....

Meanwhile have you checked the injectors' ground on the block, it has a habit of turning green?
_________________
White 87 924S "Ghost"
Silver 98 986 3.6l 320 HP "Frank N Stein"
White 01 986 "Christine"
Polar Silver 02 996TT. "Turbo"
Owned and repaired 924s since 1977
Porsche: It's not driving, it's therapy.

RIPDOTCOM · Posted: Thu Aug 24, 2006 10:41 pm Post subject:

Paul · Posted: Sat Aug 26, 2006 9:23 am Post subject:

Look under the heater control valve.
_________________
White 87 924S "Ghost"
Silver 98 986 3.6l 320 HP "Frank N Stein"
White 01 986 "Christine"
Polar Silver 02 996TT. "Turbo"
Owned and repaired 924s since 1977
Porsche: It's not driving, it's therapy.

RIPDOTCOM · Posted: Sat Aug 26, 2006 10:39 pm Post subject:

I looked there, nothing. I think its the ecu. I sent it to a guy in N.Y. to test.