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Old 07-21-2018, 03:31 PM   #1
Bradrcr
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Join Date: Mar 2011
Chapter/Region: NWIC
Location: Seattle, Wa
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2005 SaaBeeru
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Default HELP! Ď05 Intermittent engine cutoff with high voltage

Well, my shop and I are at a loss. For about 3 months now my Ď05 92-X will occasionally go into a Ďmodeí where it will lose electrical power for a split second, repeatedly, usually short enough that it can not kill the engine, it just feels like an engine miss and the lights go out for a moment. The gap between these losses can be anywhere from 20 seconds to 2 minutes, the voltage read off my accessport will be varying wildly during this time from 12-16 (normally stuck right around 14), and there will be a faint flicker from my dash lighting. The issue used to come up in about 1% of my drives but has now increased to 10%. My shop has been unable to reproduce the issue. Here is what we have tried so far with no results, as this issue does not throw an engine code:

New Alternator
Removed remote start
Replaced crank position sensor
Replaced all HID wiring and bulbs

The issue can not be reproduced in any consistent manner, we have tried:
Throttle position (happens at idle to WOT)
Rough road
RPMs
Power draw (radio, lights)
Drive time
ECU Reset

This seems to come and go with complete randomness. I can be on a half hour drive and it will go into this power loss mode for 10 minutes out of that time and then be back to normal for the rest of the drive, and even for the next couple of days. I have an Optima yellow top that is about 5 years old and a hybrid 2.5 build running off the stock ECU. AWD Auto in Kirkland, Wa is who has been checking on it and unable to reproduce the issue. Iíve tried to keep the car running in this mode and drive it right to the shop but timing hasnít worked out. Last time I did that it went back to normal 3 minutes before I arrived. If anyone else has seen this mystery gremlin, your help and suggestions would be appreciated, even if itís a suggestion on how to reproduce the problem.
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Old 07-21-2018, 09:26 PM   #2
CaptainSlowbaru
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Location: Roberts Subaru-Downingtown, PA
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Check the engine grounds real good- especially the main one at the starter. Those little puny ones under the engine always disintegrate, so replace them if they're bad. Add extra grounds if you can. Have you tested the battery for a bad cell?
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Old 07-21-2018, 10:19 PM   #3
Bradrcr
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Location: Seattle, Wa
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2005 SaaBeeru
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Quote:
Originally Posted by CaptainSlowbaru View Post
Check the engine grounds real good- especially the main one at the starter. Those little puny ones under the engine always disintegrate, so replace them if they're bad. Add extra grounds if you can. Have you tested the battery for a bad cell?


I have had the battery tested and it did check out ok, but this is an intermittent issue so there is a chance that it may not have shown a problem right at that moment. I have a spare battery but itís been dead for 2 years, put it on a trickle charger just a few hours ago to try swapping it in.
Grounds are good, the engine only has 9k miles on it so a lot of items were cleaned up or replaced in the swap.
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Old 08-15-2018, 01:10 PM   #4
Bradrcr
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Bump- put in a brand new battery, made sure all grounds were good, and everything has been fine for a couple weeks. Now I am on a 1400 mile road trip for work and the problems are back and as bad as ever. Car lost power every minute for about a half hour but now seems back to normal, my guess is it will not last.
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Old 09-02-2018, 04:22 PM   #5
Bradrcr
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Bump- I called my shop and mentioned the bad ground idea. They suggested I disconnect all aftermarket attachments. I disconnected my factory and aftermarket under seat subs. The issue came back and while I was having the voltage issues I unplugged my aftermarket radio. The issue is still there and I’m still stuck scratching my head. However, I realized I can ‘activate’ the engine cutoff so long as I see the gauges doing their faint flickering. Flashing the brights will almost always cause the engine to briefly cut out, and turning the A/C off and then back on often will. The nearest shop is probably an hour from my oil rig, still looking for input if anyone else has seen this.

Last edited by Bradrcr; 09-03-2018 at 09:23 AM.
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Old 09-23-2018, 10:41 AM   #6
bp05obxt
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Have you check all of the alternator wiring for possible breaks or corrosion? Turning high beams or A/C on seems to say more demand or load on the charging systems is a problem. Maybe it is struggling to actually charge enough or their is a drop initially dude to the load? I donít know just speculating.
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Old 09-23-2018, 03:50 PM   #7
Bradrcr
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2005 SaaBeeru
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Thatís what I started to think, as I do have a broken clip on my main alternator connector. However, that clip has been broken for years and when I tried to push it in further, the plug would not move more, it seems like the female side was holding it in tight. I didnít post an update since I had limited internet on my oil rig, but I managed to get in a 200 AMP Eagle High Alternator from Amazon. I know thatís 250% of stock power but I had an issue with a 70 amp on a different vehicle years ago. I wound up buying an 85, 105, and then finally a 150 before solving the issue, so I just decided to start high and it was one of the only high powered ones I found and a steal at $135. I did have to loosen and retighten a couple of the housing screws to get it around the AC bracket, the pulley has an extra tooth and the wiring inlet had to be turned 45 degrees, which arenít great signs. However, I put it on and drove 1125 miles from work to my house in one day and I never had a power loss. Hopefully this will help someone who runs into this issue as I would guess that this problem would present itself with far more regularity if itís truly just low amperage. I realize that the issue could possibly be arising again and the 150% greater amperage could just be masking it too. If thatís the case, my next step will be to replace the ECU, thatís the last part my mechanics and I could possibly consider.
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