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Old 07-11-2011, 06:38 PM   #1
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No start, no idea

Today I left all 4 windows open just a crack, and then a nasty storm crept up on me while I was at work, moving a very expensive private jet. Obviously I couldn't just ditch the plane in the middle of towing it to a hangar, so my interior got soaked. Now this may only be coincidental, but my car refuses to start as well. Everything turns on like normal, car cranks as it did before. I even tried a spare ecu I have on hand, as well as DIC that stays in the trunk. None of this did anything. I can't spot any blown fuses, so there's nothing pointing directly to what went wrong (looked through both fuse boxes while I waited for a ride) I ended up leaving the car at the airport I work at, and got a ride home, hoping that maybe it was just damp and needed to sit overnight and dry out.

https://www.saablink.net/forum/car-pr...only/55612.htm

That was a problem I had noticed yesterday, not sure if thats tied into this or just a bad tank of gas. I had filled up just before that started.
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Old 07-11-2011, 07:30 PM   #2
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Does the DI spark ? Put a plug in it point it towards a ground and crank it, look for spark.
No spark? Try DI, crank sensor or immobilizer issues (TWICE unit is under driver's seat and if you got ALOT of water in it it could short).

Spark? Ok, do you have fuel? Does the pump run when the turn the key (may need a helper)? No? You may have to cut a hole under the rear seat to test if the pump is getting power. With a test light or volt meter see if the power wire (the bigger red one) is getting power. If its getting power and not running you need a pump, no power, check fuse, then I'd go to ignition switch and test that.

There is a start, and my general diagnostic strategy for these cars.

Hopefully she dries out.
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Old 07-11-2011, 08:32 PM   #3
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Don't know if I have spark since the car isn't with me, and no tools were there to try to pull a plug out. I swapped to a known good DI, so that kind of rules that part out for now. Crank sensor was put in last fall. The car cranked as strong as it had before, just no start. Couldn't hear much due to noise, but was able to put a hand on the fuel pump (already have that hole cut from previous work, and could feel it do something when I turned the key. Fuse was good. Stupid ignition better not be done, since I did that 1.5yrs ago. I don't think it took on too much water, just a general dampness from the rain when I got in it after work. Guess I'll have to dig up my volt meter, or just buy another if I can't find it.
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Old 07-12-2011, 05:51 PM   #4
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Spark is ok, fuel pump is not getting power. I tried swapping relays around, still nothing.
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Old 07-12-2011, 07:30 PM   #5
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Is this possibly caused by a security system issue? In t5suite, I found that my vss was disabled on the original ecu, and we set it that way on the tuned one. However, if something were to go wrong with the security system, would this cause the same thing, or would there be no crank at all?
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Old 07-13-2011, 06:54 AM   #6
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I'm going to try and jump the fuel pump and see if that does anything. If it does, then I've got a lack of power, and not sure whats causing it. Guess I'll be looking into finding a tow truck and see about which Saab shop will turn it around fastest.
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Old 07-13-2011, 07:01 AM   #7
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You left the windows up, but did you lock it?

Small chance maybe something is up with the imobilizer.
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can be prone to failure due to increased localized stresses in the hole penetrations
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Old 07-13-2011, 07:08 AM   #8
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You left the windows up, but did you lock it?

Small chance maybe something is up with the imobilizer.
Yes, I did lock it. Where is the immobilizer, under driver's seat? And how do I get it out to test it or replace? That was my last guess for what it could be, but I have no idea what to do with it.

EDIT: nevermind, found where the TWICE box lives. That side of the car got more water in it. Although it wasn't standing water, might be just enough moisture to screw up that little piece of electronics.
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Old 07-13-2011, 03:21 PM   #9
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Pulled the immobilizer /alarm control/whatever out from under the seat, set it in a warm place to dry. Carpet under the seat is dried out now. No moisture to speak of. I checked with a test light, and there is NO power at the fuel pump fuse, yet there IS power at the relay. I'm not sure whats up with that. Anyone have an idea of where I should look next, or am I better off towing it to a shop? I've run out of ideas at this point.

Tried to no avail to find one at Crazy Ray's, but sadly they were all drenched from being in convertibles with no roof, or some asshat left a door open.
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Old 07-14-2011, 06:45 AM   #10
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bump...any suggestions on what to look at next?
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Old 07-14-2011, 07:13 AM   #11
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You sure you didn't set the imobilizer with the method of locking the car you used?
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can be prone to failure due to increased localized stresses in the hole penetrations
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Old 07-14-2011, 07:17 AM   #12
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You sure you didn't set the imobilizer with the method of locking the car you used?
All I ever used was the key in the lock, since that's all I've had since day one. Never did this before. So by what you're saying, would an "unlocked" alarm unit fix this problem?
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Old 07-14-2011, 08:38 AM   #13
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alarms, immobilisers and the like.... - SaabCentral Forums

Start with this, then get an owners manual.
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Old 07-14-2011, 09:01 AM   #14
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That damn box under the driver's seat has to be the problem, yet all the ones I can find locally are questionable. All the people online want way too much for them, but I guess at some point I'll have to pay up.
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Old 07-14-2011, 09:36 AM   #15
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Found a .pdf owners manual online. I had no idea the anti-theft system was so complex on these cars. Now I know why I can't unlock the doors from any other door than the drivers.
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Old 07-14-2011, 01:32 PM   #16
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You can, you just have to lock it from the pass side.
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Old 07-14-2011, 02:08 PM   #17
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You can, you just have to lock it from the pass side.
I wish, that one doesn't turn with a key in it.
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Old 07-14-2011, 05:14 PM   #18
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After a bunch of reading on the subject of the alarm module, I'm still a little confused. I pulled it, just to see what would happen, and I couldn't even get the car to crank. With it back in, it will crank but not fire, as there's no power going to the fuel pump. Would the alarm module be the cause, or do I need to keep looking? Aside from a break in the wires somewhere, which I doubt, what else would be the likely culprit? I'd rather no just throw money at the problem.
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Old 07-14-2011, 07:25 PM   #19
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srp also mentioned that this unit can be bypassed. How is this done?
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Old 07-15-2011, 07:01 PM   #20
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Fiddled with the car some more today, held down the clear button on SID, and service came up. I think this confirms that the alarm is indeed to blame. Is this correct?
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