Updated Alternator/Starter cable
02-15-2014, 04:03 PM
#31
Nordschleife Master
Thread Starter
Yes. I hear the SAI pump run on start up. The strange thing is I did not get any error codes until the 3rd time or so I used the car after my repairs. I then cleared the codes and they came back after a few more uses. I cleared the codes again and am waiting to see if they come back.
I'm wondering if the carb cleaner I used (generously) on the intake is causing the issue and is burning off. Hoping I dont have to take the Alternator out again although it should be much easier this time.
I'm wondering if the carb cleaner I used (generously) on the intake is causing the issue and is burning off. Hoping I dont have to take the Alternator out again although it should be much easier this time.
http://p-car.com/996/diy/sai/mainpage.html
04-27-2015, 07:05 PM
#36
Drifting
Bump to an older thread. I just did this fix today and used this trick: https://rennlist.com/forums/996-foru...implified.html
The hot water worked perfectly. I have a '99 and did NOT have to remove the throttle body, intake plenum, or loosen the A/C compressor. This trick made this fix very simple, all things considered.
The hot water worked perfectly. I have a '99 and did NOT have to remove the throttle body, intake plenum, or loosen the A/C compressor. This trick made this fix very simple, all things considered.
Last edited by islaTurbine; 04-27-2015 at 07:32 PM.
05-07-2015, 11:07 PM
#38
Dead On---Thank you!
I have to thank you and everyone who contributed to this thread. I am really grateful for the valuable information shared.
I purchased a '99 996 C2 in October 2014. Less than 10k miles before I purchased the car, the engine was replaced on the car by the previous owner professionally with a complete rebuild using a '01 block, L&N Engineering Nickies upgrading the bore from 3.4L to 3.6L, forged pistons and their IMS upgrade.
I had the exact problem happening on my car. Thinking it was the alternator, starter, voltage regulator, battery, etc., I was ready to endure a massive repair bill one way or the other.
However, going through the service records carefully, I then recognizing that only 5,000 miles had passed since the alternator was replaced with a new one, I became suspicious...
At that time, a new cable was installed and it was part number 99660701901...the older number Porsche had.
Curious, I sprayed a little WD-40 on the contacts at the starter and the + jump pole of the cable and the voltage increased, at least when cold and then the resistance of the heat when the engine warmed up made the voltage drop just like all the rest of you experienced...I knew something else had to be going on.
I too contacted Sunset Porsche and gave my VIN. I got the updated/upgraded part No. 99660701903...I had the parts specialist check and he indicated that he was aware of the other number but to go with this one....how right he was.
It took about a week to get the part in. Just as you said, about $42!
When bringing it back to the indie shop that had been servicing the car for the prior owner and actually did the engine rebuild, I brought the cable with me. Unlike other shops that whine about not wanting to install a 'customer provided part', since it was a genuine Porsche part, from a dealership no-less, they actually thanked me for having it.
However, to be on the safe side, they ran all the electrical tests that confirmed our hunch. The alternator/voltage regulator, battery and starter were all good.
Thereafter, the plan was to install the cable and then retest and if necessary do whatever else was needed. It turns out, nothing else was...
The previous cable had actually 'melted' in certain areas...they apologized for using the older part 99660701901 when replacing the alternator for the previous owner because their supplier did not have the new part number 99660701903, which they admittedly stated had some noticeable differences at the terminals and a bit in the length. They say it happens a lot when an older part is sitting on a shelf and the supplier moves what they have...
Makes me think that the changed configuration of the part and the trouble that we all share, the part should have been an optional recall.
Overall, between the testing, removing of the old one, installation of the new one, retesting, and closing the project out, they put in about 4 hours but lucky me, I was charged for only 2.8 hours which is more than fair for the work done.
My results are the same....
Once more, without the direction of your thread, and the contribution of all of you, I would not have had the insight to target the problem and arrive at a simple and cost effective solution.
Thank you.
I purchased a '99 996 C2 in October 2014. Less than 10k miles before I purchased the car, the engine was replaced on the car by the previous owner professionally with a complete rebuild using a '01 block, L&N Engineering Nickies upgrading the bore from 3.4L to 3.6L, forged pistons and their IMS upgrade.
I had the exact problem happening on my car. Thinking it was the alternator, starter, voltage regulator, battery, etc., I was ready to endure a massive repair bill one way or the other.
However, going through the service records carefully, I then recognizing that only 5,000 miles had passed since the alternator was replaced with a new one, I became suspicious...
At that time, a new cable was installed and it was part number 99660701901...the older number Porsche had.
Curious, I sprayed a little WD-40 on the contacts at the starter and the + jump pole of the cable and the voltage increased, at least when cold and then the resistance of the heat when the engine warmed up made the voltage drop just like all the rest of you experienced...I knew something else had to be going on.
I too contacted Sunset Porsche and gave my VIN. I got the updated/upgraded part No. 99660701903...I had the parts specialist check and he indicated that he was aware of the other number but to go with this one....how right he was.
It took about a week to get the part in. Just as you said, about $42!
When bringing it back to the indie shop that had been servicing the car for the prior owner and actually did the engine rebuild, I brought the cable with me. Unlike other shops that whine about not wanting to install a 'customer provided part', since it was a genuine Porsche part, from a dealership no-less, they actually thanked me for having it.
However, to be on the safe side, they ran all the electrical tests that confirmed our hunch. The alternator/voltage regulator, battery and starter were all good.
Thereafter, the plan was to install the cable and then retest and if necessary do whatever else was needed. It turns out, nothing else was...
The previous cable had actually 'melted' in certain areas...they apologized for using the older part 99660701901 when replacing the alternator for the previous owner because their supplier did not have the new part number 99660701903, which they admittedly stated had some noticeable differences at the terminals and a bit in the length. They say it happens a lot when an older part is sitting on a shelf and the supplier moves what they have...
Makes me think that the changed configuration of the part and the trouble that we all share, the part should have been an optional recall.
Overall, between the testing, removing of the old one, installation of the new one, retesting, and closing the project out, they put in about 4 hours but lucky me, I was charged for only 2.8 hours which is more than fair for the work done.
My results are the same....
Once more, without the direction of your thread, and the contribution of all of you, I would not have had the insight to target the problem and arrive at a simple and cost effective solution.
Thank you.
Hi guys,
Just want to let you know the updated cable from Porsche (P/N 99660701903) is really nice ($40 from Sunset Porsche). My old cable is heavily corroded at the started end. I discovered it by doing a voltage drop test on that cable under load (a/c and low beam ON) and found I lost ~0.5V on that 3 ft cable (@54A)!
My voltage gauge reading would sometimes drag down to a hair below 13V when I had heavier load ON. Now with the new cable, I only lose 50mV on that same cable and my voltage stays at ~13.4v even with heavy load. I highly recommend the new cable even though it's a bit of a pain to replace it.
I also replaced my voltage regulator with F00M-144-136 from Pelican and it works just fine. There's nothing wrong with my old one F00M-145-350 but I figure since I have it apart, I may as well replace it and leave the old one as a spare.
Attachment 741156
Attachment 741157
Attachment 741158
Attachment 741159
Attachment 741160
Attachment 741162
Just want to let you know the updated cable from Porsche (P/N 99660701903) is really nice ($40 from Sunset Porsche). My old cable is heavily corroded at the started end. I discovered it by doing a voltage drop test on that cable under load (a/c and low beam ON) and found I lost ~0.5V on that 3 ft cable (@54A)!
My voltage gauge reading would sometimes drag down to a hair below 13V when I had heavier load ON. Now with the new cable, I only lose 50mV on that same cable and my voltage stays at ~13.4v even with heavy load. I highly recommend the new cable even though it's a bit of a pain to replace it.
I also replaced my voltage regulator with F00M-144-136 from Pelican and it works just fine. There's nothing wrong with my old one F00M-145-350 but I figure since I have it apart, I may as well replace it and leave the old one as a spare.
Attachment 741156
Attachment 741157
Attachment 741158
Attachment 741159
Attachment 741160
Attachment 741162
05-07-2015, 11:19 PM
#39
Nordschleife Master
Thread Starter
Glad to hear that this post actually helped! This problematic cable should be replaced whenever someone experiences a low voltage and/or cranking problem. Now with the latest smart hot water trick, replacement should be a snap.
05-07-2015, 11:30 PM
#40
Drifting
I can't seem to find a difference between the 01 and 03 versions of this cable. My parts guy did a pretty extensive search on this and the -01 apparently isn't superseded by anything. Everything he could find said that the 03 cable is only for MkIIs.
Needless to say, I installed the 01 on my '99.
Needless to say, I installed the 01 on my '99.
05-08-2015, 12:26 AM
#41
Nordschleife Master
Thread Starter
I can't seem to find a difference between the 01 and 03 versions of this cable. My parts guy did a pretty extensive search on this and the -01 apparently isn't superseded by anything. Everything he could find said that the 03 cable is only for MkIIs.
Needless to say, I installed the 01 on my '99.
Needless to say, I installed the 01 on my '99.
http://www.autoatlanta.com/porsche-p...section=902-05
My original cable ends with -02 so the -03 was an upgrade for me.
Looks like the -01 is alredady the latest for MkI. Anyway, my -03 cable failed again in 1+ yr and I'm on my second -03 now! Looks like Porsche is still not getting it right despite the upgrade.
05-08-2015, 12:38 AM
#42
Drifting
I have the same understanding as you. Looks like the -01 and -03 split at engine number 66309950
http://www.autoatlanta.com/porsche-p...section=902-05
My original cable ends with -02 so the -03 was an upgrade for me.
Looks like the -01 is alredady the latest for MkI. Anyway, my -03 cable failed again in 1+ yr and I'm on my second -03 now! Looks like Porsche is still not getting it right despite the upgrade.
http://www.autoatlanta.com/porsche-p...section=902-05
My original cable ends with -02 so the -03 was an upgrade for me.
Looks like the -01 is alredady the latest for MkI. Anyway, my -03 cable failed again in 1+ yr and I'm on my second -03 now! Looks like Porsche is still not getting it right despite the upgrade.
05-08-2015, 11:14 AM
#43
01 vs. 03 cables
Jesse at Sunset Porsche actually ran my VIN...I have a '99 C2 and the rebuilt engine is from a '01 (04 6610...)-both would be considered MK1 models.
He crossed referenced both parts and the cable ending in 03 was what was coming up on his computer. I specifically asked him about the 01 that was available and in the car but he insisted that the 03 cable is the proper one for me and I should order that one.
Looking at the 2 cables, the contacts on the 03 cable seem to be broader and heavier a bit. The cable assembly seems to be a bit thicker and ever so slightly shorter than the 01...
The end result is that the cable worked and I am getting normal voltages even under heavy loads.
He crossed referenced both parts and the cable ending in 03 was what was coming up on his computer. I specifically asked him about the 01 that was available and in the car but he insisted that the 03 cable is the proper one for me and I should order that one.
Looking at the 2 cables, the contacts on the 03 cable seem to be broader and heavier a bit. The cable assembly seems to be a bit thicker and ever so slightly shorter than the 01...
The end result is that the cable worked and I am getting normal voltages even under heavy loads.
I have the same understanding as you. Looks like the -01 and -03 split at engine number 66309950
http://www.autoatlanta.com/porsche-p...section=902-05
My original cable ends with -02 so the -03 was an upgrade for me.
Looks like the -01 is alredady the latest for MkI. Anyway, my -03 cable failed again in 1+ yr and I'm on my second -03 now! Looks like Porsche is still not getting it right despite the upgrade.
http://www.autoatlanta.com/porsche-p...section=902-05
My original cable ends with -02 so the -03 was an upgrade for me.
Looks like the -01 is alredady the latest for MkI. Anyway, my -03 cable failed again in 1+ yr and I'm on my second -03 now! Looks like Porsche is still not getting it right despite the upgrade.
05-08-2015, 12:00 PM
#44
Drifting
Well here's something interesting. I kept the old, decrepit cable that I recently replaced. Just went out and looked at the part number on it. Yup, you guessed it: it's an -03. Here's a link to the pic of how bad that cable became. I don't know it's age but obviously it's been replaced before.
http://www.renntech.org/forums/topic...eded/?p=266777
As Ahsai inferred above, it likely won't matter if it's an -01 or -03, the cable will continue to fail. It might be best to start making our own...
http://www.renntech.org/forums/topic...eded/?p=266777
As Ahsai inferred above, it likely won't matter if it's an -01 or -03, the cable will continue to fail. It might be best to start making our own...
05-08-2015, 12:58 PM
#45
What do you think did that to your cable? 'farmer boy' indicated that he had a defective starter that he replaced and looking at the photo of the terminal you posted, looks to be the end at the starter. Do you think your starter has a short that caused that? Corrosion? Engine Temperature?
