14 captured repliesDiscussion pagination complete · Source accounts, not a confirmed diagnosis
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Discussion summary
YOUR RESEARCHHELP! 996 Dead b/f race weekend
Leading reported evidence
Check grounds and still no fire
Performed · outcome unconfirmed
No successful repair reported for this finding.
0
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0
Unsuccessful attempts
1
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Leading evidence: 'Check grounds and still no fire' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Check grounds and still no fire' (1 discussions). For that action, 0 discussions report a resolution and 0 report an unsuccessful attempt. No action has an explicit, attributable resolution report under the current rules. These are forum reports and suggestions, not a confirmed diagnosis.
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Suggestion
Check for voltage between pins 2 & 7 on the start lock relay socket (relay #7 on relay support #2, located on the same shelf as the DME, but more on the driver's side) as you are attempting to crank.
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Suggestion
Turns out I had loosened the ground wire while changing a plug, not disconnected, just loosened.
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Suggestion · Original poster
When we replaced the old relay (which looked perfectly fine) with a new one, the car would still not start.
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Suggestion
Check for voltage between pins 2 & 7 on the start lock relay socket (relay #7 on relay support #2, located on the same shelf as the DME, but more on the driver's side) as you are attempting to crank.
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14 eligible posts · 0 unverified posts · 1 discussions match the subject in their title or opening post.
Rennlist: 1 discussions
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Generation: 20261027T165639Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources
Ok Experts, this is my situation. I took my '99 996 off the trailer, disconnected the battery and stripped a little more of the interior out (nothing more than carpet). After about a week, I connected the battery back up (plenty of charge) and attempted the start the car back up. All the lights on the dash lit up but the engine would not fire or crank. I tried a couple of times but no luck.
After having a couple of local Porsche mechanics come over to test everything, this is what we found;
All fuses are fine. No problems with the Battery & Clutch Switch. We tested the Starter and it seemed to be fine. Then we tested the Ignition Switch and there was plenty of power coming in and going out of the Ignition Switch. Then we tested the Ignition Switch Relay and as is turns out, there is plenty of power going into the relay but no power going from the Ignition Swich Relay back to the Starter. When we replaced the old relay (which looked perfectly fine) with a new one, the car would still not start. For some reason, the contact within the relay was not engaging on either the new relay or the old one. When we manually engaged the relay, the car fired right up. Now, we are stumped as to why the Ingition Switch Relay is not engaging. Does it have to do with one of the four wires that goes into the relay or is it a simpler or harder problem than that? Any help would be greatly appreciated. I have a race this weekend that I would like to compete in but I need my car to start first. After that, everything is ready to go! Help Rennlisters!
Rich,
Did you get your answer on what gear to use in the bus stop in? I watched the video and it looks like I was in 3rd.
Nice to see you in Sebring. Get that car running!
Jim
Cam,
Thanks! Yours is not too bad either
I thought I was the only one to have this avatar too!
As or my problem, I will be getting a diagram of all my ground spots this evening. I have re-tightened down all the ones I can find but I know there is more. Hopefully that is my problem. Any other suggestions!
Doug, where is the alarm box? That isn't in the same location as the Airbag sensor, is it? Otherwise, I don't think I removed it.
The alarm box is under the driver's seat.
Check for voltage between pins 2 & 7 on the start lock relay socket (relay #7 on relay support #2, located on the same shelf as the DME, but more on the driver's side) as you are attempting to crank. If you don't have voltage there, something is convincing the DME that you're not allowed to start the car.
I had the same issue. Turns out I had loosened the ground wire while changing a plug, not disconnected, just loosened. Once I tightened it back, she fired right up!!
Update: still nothing! I've checked all the grounds and still no fire. It is definitely the Starter Relay. It is not triggering and we can not figure out why? Anyone have any more possibilities?
flankenspeil - yes, I took out the airbag sensor when I stripped the car a few months ago and it ran fine with it out.
Doug - yes, I took out the alarm box when I changed to a racing seat 2 years ago. No problem there.
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