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Angry ignition woes

alright, so my current delima is in the ignition somplace. ive just taken the head off in order to replace the valve which was bent when the belt broke, and now ive got everything back together except the starter wire thing (runs up to above and behind the engine, and the harness on it is just three pins) which i cant find the other piece that needs to be connected, in my haynes i found a picture, but thats all and i dont know where the other end is even supposed to lead.

do you think this is my problem, or do you think i have a problem elsewhere?

PS - all other aspects of the engine are fine, compression, timing belt position. i just dont understand this whole computer thing or something, is there a reset, i dont know im just rambling. but anyway thanks for anyhelp it would be great
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Old 03-26-2005, 11:00 PM
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Take a pic of the wires you haven't connected. If that is all that isn't connected then there is a good chance that is why you are having problems with spark.
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Old 03-27-2005, 06:24 AM
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That sounds like the speed and ref sensors. Your car will not run w/out those hooked up.
Old 03-27-2005, 04:43 PM
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alright, ill try to get a picture up, but all i know is its coming from the starter, so if its the sensor that you speak of, where is the other end of it
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95 - BMW 740i (daily driver)
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RX-7 built of other RX's (and a good place to throw money) (sold)
z31 300zx vg30det+ (new money sucker)
Old 03-27-2005, 07:06 PM
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That sounds like the TDC sensor. Doesn't have anythting connected to it as it's for a diagnostic tester. The connector has three small pins.

The speed and reference sensors have rectangular connectors and the 02 sensor right there too.
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Old 03-27-2005, 09:35 PM
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no i know what harness you are talking about, i believe, it has a dummy plug on it to keep it clean, this plug looks similar though, thanks so for the help so far anything else would be great
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95 - BMW 740i (daily driver)
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RX-7 built of other RX's (and a good place to throw money) (sold)
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Old 03-27-2005, 11:40 PM
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Why would you disconnect the starter to take the head off????

I'm going with the speed and reference sensors. There is a third sensor back there that is supposed to be used by the dealer. This is not used by the electronic injection.

If you have the two sensors, speed and reference, plugged into each other the engine will crank but not start. You can tell right away when you pull a plug wire, insert a spare plug and lay it on the intake manifold. If the plug doesn't fire then you have the sensors cross plugged.

There are a few other items that will keep the engine from firing too. All of the sensors have to be plugged in.

Extensive descriptions of problems are encouraged.
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When was the last time you changed your timing and balance belts and/or cam chain and tensioner?
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Old 03-28-2005, 06:35 AM
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It the car really is a Euro (ROW) car then it may be the 02 sensor wire as that would have been added afterwards to comply with EPA rules.
Euro cars didn't have catalysts as original equipment until early 90s.
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Old 03-28-2005, 09:13 AM
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I just drool thinking of those higher compression pistons!
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Hugh - So Cal 83 944 Driver Person
NOT a 'real' Porsche -- Its Better!!!!
When was the last time you changed your timing and balance belts and/or cam chain and tensioner?
New Users please add your car's year and model to your signature line!
Never break more than you fix!

Last edited by SoCal Driver; 03-28-2005 at 09:41 PM..
Old 03-28-2005, 10:51 AM
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yeah those pistons are going to be great when i get a chance to finally drive it i hope what you say is correct, im going to go out on wednesday to check it out, my only question is where is this speed and ref. sensor location to plug in at

thanks for all your help
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95 - BMW 740i (daily driver)
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RX-7 built of other RX's (and a good place to throw money) (sold)
z31 300zx vg30det+ (new money sucker)
Old 03-28-2005, 09:25 PM
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Items 10. The ends of the cables mount in the bracket item 17 that is bolted to the back of the engine.

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Hugh - So Cal 83 944 Driver Person
NOT a 'real' Porsche -- Its Better!!!!
When was the last time you changed your timing and balance belts and/or cam chain and tensioner?
New Users please add your car's year and model to your signature line!
Never break more than you fix!
Old 03-28-2005, 09:44 PM
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nope not that got that all hooked up, this part looks more like a oversized MIDI jack, where the pins on it are layed out in a triangle, with a gray sheath on the wire and a black firm rubber sleave on the tip around the pins

honestly thanks for the effort though
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95 - BMW 740i (daily driver)
02 - kawasaki mean streak (nice weather driver)
RX-7 built of other RX's (and a good place to throw money) (sold)
z31 300zx vg30det+ (new money sucker)
Old 03-28-2005, 11:33 PM
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Take a digital picture and post it.
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Hugh - So Cal 83 944 Driver Person
NOT a 'real' Porsche -- Its Better!!!!
When was the last time you changed your timing and balance belts and/or cam chain and tensioner?
New Users please add your car's year and model to your signature line!
Never break more than you fix!
Old 03-29-2005, 06:30 AM
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That would be the TDC sensor for diagnostic use then.
Number 24 on Hugh's parts diagram.
If not it's the 02 sensor as there are no other sensors installed by Porsche in that area.
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From November 2012; Precision Porsche Specialist
Sussex UK, +44 (0)1825-721-205
2001-2012 Gerber Motorsport Inc. 206-352-6911
07.15.06 1996 Ducati 900SP. Suprisingly enough, it's red
08.16.09 1999 Kawasaki ZRX1100. Green.

Last edited by Britwrench; 03-29-2005 at 08:56 AM..
Old 03-29-2005, 08:54 AM
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