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Join Date: Jun 2011
Location: Western PA along I-80
Posts: 51
944 shut off unexpectedly. Need advice.

II have another thread open about having a miss in the engine when I apply throttle quickly.

The other day, I was driving the car, and while sitting at a stop sign, it just shut of, and would not start again. The engine cranks, but it wont start.

Normally, I can hear the fuel pump, but now I cannot, so I am thinking either the fuel pump relay, or the fuel pump has gone bad. It makes sense since both are electrical components, the miss would only occur as the car warmed up, and it only occurred under a load. I've had fuel pumps go bad in other vehicles, and this
was usually how they acted.

I though I would try the relay first, so I pulled relay number II top row, which in my diagram, is the fuel pump relay. I tried to buy a new one, but no one has one, and the numbers do not cross reference to anything, so I am out of luck there.

The number stamped on the side is 230703.

On the front, it has the following information...
89 8892 000
12V max. 15A
>PA6 - GF 30<
Made in Hungary

There is a circuit diagram printed on the side.
It has 6 pins printed in the following order, with numbers under each pin number
4 9 8 1 3 2
(87b) (85b) (87) (85) (86) (30)


First of all, does anyone know if this is actually the fuel pump relay?
Second, does anyone know how to test it?
Third, does anyone know where I can get a new one if this one is bad?
Fourth, does it sound like anything else (DME maybe?)
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1983 944na
Old 12-26-2011, 09:44 AM
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1983 944 N/A
 
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Location: Inland Empire, California
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Go to Clark's Garage Home Page, then shop manual, 1/4 of the way Dow the page it would say DME Relay Technical Information and Testing , that is your fuel pump and DME relay. He shows you how to bypass it to see if its the relay or the fuel pump, good luck hope its just the relay.

Last edited by POPS 83 944; 12-26-2011 at 09:55 AM..
Old 12-26-2011, 09:52 AM
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Quote:
Originally Posted by POPS 83 944 View Post
Go to Clark's Garage Home Page, then shop manual, 1/4 of the way Dow the page it would say DME relay test, that is your fuel pump and DME relay. He shows you how to bypass it to see if its the relay or the fuel pump, good luck hope its just the relay.
Thanks for the info.

BTW, I found the relay here on Pelican, and it is exactly like mine, so I'm glad that I can get one if I need it.
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1983 944na
Old 12-26-2011, 09:55 AM
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Always carry a spare. Will save you a lot of trouble, ask anyone!
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87 951 all stock exc. cup II's /94 968 6-spd, lowered,17in. RUF Speedlines, M030 anti- sways/ 94 968 Tip, Cup II's, otherwise stock
Old 12-26-2011, 05:22 PM
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I would make sure that you are getting spark to the sparkplugs. When my 944 died at a stop light with no warning I was only getting voltage to the coil and not to the sparkplugs. Turns out I had a bad refernce sensor.
Old 12-26-2011, 06:16 PM
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Same thing happened to me last week. Stupid hose from the AFM came off and was seriously jacking up the air/fuel mixture. Moral of the story is check all your hoses and connections.
Old 12-27-2011, 03:34 PM
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carry a flashlight. Murphy's law says that if anything fails, it will usually be at night in the weather. That little light under the hood is useless.
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3 944's, 2 Boxsters and one Caman S, and now one 951 turbo. Really miss the Cayman.

Some people try to turn back their "odometers." Not me. I want people to know 'why' I look this way. I've traveled a long way and some of the roads weren't paved.
Old 01-01-2012, 02:33 PM
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