HOW TO DO AN ADVANCED SEARCH.

Mon Jul 08, 2013 3:56 pm by Admin


For the benefit of 944Hybrids users there are two search functions available for you to use.
The purpose of this sticky is to explain the "Advanced Search" function because it is much more powerful and is the best choice when researching information.

When you log on to the site a list of options is shown in a line at the top of the page. One option is labelled "Search", use this option (NOT the search box lower down on the right).

After you click on the upper search option, a drop down box appears. At the bottom of this box is a radio button marked "Advanced …

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Need some help with starting the motor

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Need some help with starting the motor

Post  Arthropraxis on Mon Jun 20, 2011 3:55 pm

When the key is turned from off to on (first position) the starter immediately starts turning over and keeps going until it is turned back to the off position. If you have any ideas, please, help. I was going to have it's first start today. I was looking forward to the first start today.
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Re: Need some help with starting the motor

Post  spence on Mon Jun 20, 2011 4:00 pm

What kind of starter? How did you wire it?
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Re: Need some help with starting the motor

Post  Arthropraxis on Mon Jun 20, 2011 4:21 pm

Factory LS1 2004 GTO starter. Positive battery cable to the starter lug and the Porsche Red/black wire to the solenoid connector. Without the ECM hooked up the key positions act normal. The accessories come on in the first postion. With the ECM hooked up the starter turns on as soon as the key is turned.
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Re: Need some help with starting the motor

Post  spence on Mon Jun 20, 2011 4:30 pm

The starter will act normal without the ECU plugged in? That red/black wire should only be getting power when you start the car. There must be something up with the wiring somewhere. That's weird... Sorry, I have no clue?
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Re: Need some help with starting the motor

Post  Arthropraxis on Mon Jun 20, 2011 4:36 pm

The starter does nothing without the computer hooked up, but the accessories will work. The key switch doesn't have any resistance to it either. When the key is turned it just stays where you put it. The key doesn't kick back. Maybe an ignition switch issue?
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Re: Need some help with starting the motor

Post  spence on Mon Jun 20, 2011 4:38 pm

Ya, maybe... Sounds like it could be a problem
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Re: Need some help with starting the motor

Post  spence on Mon Jun 20, 2011 4:40 pm

The starter should work without the ecu plugged in...
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Re: Need some help with starting the motor

Post  Arthropraxis on Mon Jun 20, 2011 4:58 pm

Without the computer plugged in the starter does nothing.
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Re: Need some help with starting the motor

Post  Dawgz83948 on Mon Jun 20, 2011 5:09 pm

Arthropraxis wrote:Without the computer plugged in the starter does nothing.
Then it's wired wrong. The computer has NOTHING to do with the cars cranking ability. As a matter of fact you should have used the stock 944 harness for the alternator/starter. Do not continue as you may be putting too much current throught the ECU and can possibly fry it until you figure out why it's doing this. Is your car and early car or late car?
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Re: Need some help with starting the motor

Post  Arthropraxis on Mon Jun 20, 2011 5:39 pm

Thanks, I don't know how else to wire it. Positive from the battery to the starter lug and the Red/Black starter wire from the firewall to the small pole on the solenoid. The key does not feel right in the ignition switch either, kind of empty feeling. This is a 87 Turbo, BTW.
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Re: Need some help with starting the motor

Post  Dawgz83948 on Mon Jun 20, 2011 5:45 pm

Arthropraxis wrote:Thanks, I don't know how else to wire it. Positive from the battery to the starter lug and the Red/Black starter wire from the firewall to the small pole on the solenoid. The key does not feel right in the ignition switch either, kind of empty feeling. This is a 87 Turbo, BTW.

I'll take pictures of my setup for you.
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Re: Need some help with starting the motor

Post  Arthropraxis on Mon Jun 20, 2011 6:08 pm

Pictures are always helpful. Any help would be appreciated.
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Re: Need some help with starting the motor

Post  spence on Mon Jun 20, 2011 6:16 pm

By the sounds of it you have it wired right... Thats all I was saying. The starter will still work without the ecu hooked up... Its got to be that ignition switch. You could always hot wire it until you get a new switch.
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Re: Need some help with starting the motor

Post  Arthropraxis on Mon Jun 20, 2011 6:25 pm

What would cause the switch to go bad? It might be as it feels weird when turning the key, it has no resistance or spring back at the start position.
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Re: Need some help with starting the motor

Post  spence on Mon Jun 20, 2011 6:27 pm

Exactly... Its probably stuck in the "start" position. So when you turn the key to "ON" it goes right to "start" and wont shut off...

Thats my guess
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Re: Need some help with starting the motor

Post  Arthropraxis on Mon Jun 20, 2011 6:34 pm

That sounds like what is happening. I took the dash out and recovered it but the switch never came out for that.
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Re: Need some help with starting the motor

Post  spence on Mon Jun 20, 2011 6:37 pm

It's still weird that the starter only turns when the ECU is plugged in though.... I'm confused; I wish I could help out more....
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Re: Need some help with starting the motor

Post  Arthropraxis on Mon Jun 20, 2011 6:42 pm

I certainly don't have a clue. Thanks, for the help.
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Re: Need some help with starting the motor

Post  Arthropraxis on Tue Jun 21, 2011 8:06 am

I took the ignition module out from behind the key switch. It has no resistance to it when it turns. The springs inside must be broken causing the shorts.
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Re: Need some help with starting the motor

Post  spence on Tue Jun 21, 2011 8:39 am

Where did you end up taking your 12v switched wire from for your switched relay? Did you end up cutting any of those wire under the dash?
Did you check the thick red/black starter wire to see if it has any power while cranking?
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Re: Need some help with starting the motor

Post  Arthropraxis on Tue Jun 21, 2011 8:57 am

I spliced into the RD/BlK wire off of fuse 36 from under the dash at the fuse box. I stripped the insulation and soldered the spice to it. I don't have a meter but the stater wire gets power when the PCM is hooked up. I think the ignition switch is stuck in start/run. I have a new one on the way.
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Re: Need some help with starting the motor

Post  spence on Tue Jun 21, 2011 9:05 am

If it was stuck on "start" the starter would still spin without the ecu hooked up. Did you double check the rest of your wiring? Double check that 14 pin connector
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Re: Need some help with starting the motor

Post  Dawgz83948 on Tue Jun 21, 2011 9:30 am

spence wrote:Exactly... Its probably stuck in the "start" position. So when you turn the key to "ON" it goes right to "start" and wont shut off...

Thats my guess

But why would it not crank with the ECU disconnected?
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Re: Need some help with starting the motor

Post  spence on Tue Jun 21, 2011 9:36 am

I know... What I said was wrong. There's something up with the wiring somewhere; it should still crank without the ecu connected
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Re: Need some help with starting the motor

Post  Dawgz83948 on Tue Jun 21, 2011 10:04 am

I forgot to snap under hood pics so I'll try to do this with word pictures instead until tonight when I can snap actual pictures.

Obvously the alternator, starter and battery get a heavy (8 gauge IIRC) connection together. Then, near the brake booster there is a white 2 pin connector that has 1 10-12 gauge wire and a small gauge (16-18 gauge) wire (blue I think). The blue wire goes to the battery idiot light and to the the back of the alternator. The heavier gauge wire connects to the solenoid on the starter and to the stock Porsche ignition. If your car does not have the start "feel" where it ckicks back and locks out start again, I'm thinking that is related to the electrical part of the ignition since it contains the springs and lockout gears. It's a cheap part (cheap being relative, I guess) that always fails on 944's, although typically not in that way. [You must be registered and logged in to see this link.]

Hope this helps.

#7 on the below diagram:

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