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NG900 & OG9-3 Workshop NG900 (1994 to 1998) & OG9-3 (1999-2002) & '03 Convertible Technical Forum

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  #1  
Old 3rd September 2007
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doorcheese doorcheese is offline
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Default car wont start

I have done alot of reading lately, but still i feel a bit stumped.

My car broke down, and i have been un able to start it.

I replaced the battery, and fuel filter, it turns over(fuel pump seems to be working) but wont start. I checked the relays and fuses and they seem to be ok.

So i guess its either the cps or the dic, where do i start? I would really appreciate the help.
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  #2  
Old 3rd September 2007
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Quote:
Originally Posted by doorcheese
I have done alot of reading lately, but still i feel a bit stumped.

My car broke down, and i have been un able to start it.

I replaced the battery, and fuel filter, it turns over(fuel pump seems to be working) but wont start. I checked the relays and fuses and they seem to be ok.

So i guess its either the cps or the dic, where do i start? I would really appreciate the help.
First, an attack plan.
Diagnosis or parts throwing ?
DIY or a third party shop ?

Remove the spark plugs - are they wet or dry ?
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  #3  
Old 3rd September 2007
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i guess i need to aquire a torq wrench first =p
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  #4  
Old 6th September 2007
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A torque wrench is a good tool to own and use, but it is not imperative for many tasks... A good working knowledge of mechanics is.. took me years to learn this..
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  #5  
Old 6th September 2007
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im a machinist not a mechanic

i have a full machine shop and i still cant find a star screw driver big enough to take the damn dic off
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  #6  
Old 6th September 2007
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You can pick up a set of Torx bits at Autozone for less than $10. They also sell loose torx bits for a few $$ each.
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  #7  
Old 6th September 2007
Scanny Scanny is offline
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Can you smell fuel when you crank the engine? When cranking does the engine seem like it almost wants to start but isnt quite there?
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  #8  
Old 6th September 2007
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Quote:
Originally Posted by Scanny
Can you smell fuel when you crank the engine? When cranking does the engine seem like it almost wants to start but isnt quite there?
not sure, and yes!
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  #9  
Old 6th September 2007
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If not overtightened or buggered by a monkey, the tools in the trunk can be used to remove the DIC..
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  #10  
Old 6th September 2007
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Quote:
Originally Posted by earthworm
If not overtightened or buggered by a monkey, the tools in the trunk can be used to remove the DIC..
i was amazed to find the tool in the trunk

but it seems slightly too small and spins under pressure (possible monkey buggering)
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  #11  
Old 6th September 2007
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Quote:
Originally Posted by earthworm
Remove the spark plugs - are they wet or dry ?
got the dic off
how can i tell if they are wet or dry, guess i will need a 10mm sparkplug socket to remove them doh

I got bought dielectric grease, anti seize, folding star driver set and will have 4 new bosch plugs in the morning.

Last edited by doorcheese; 6th September 2007 at 09:49 PM.
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  #12  
Old 6th September 2007
TwinCities Turbo TwinCities Turbo is offline
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Talking No Start Troubleshooting

Replaced the battery and still no go? That should rule out the Starter as a possible culprit since a fully charged battery would be enough to overcome a weak starter or one that has a parasitic drain on the battery.

Engine turns over, but does not start? Possible that the Alternator is to blame, however you would still be able to jump-start the car if the Alternatort were draining the battery.

Other possibility that I have encountered recently is a defective ignition switch. The switch has two halves to it, the mechanical and the electrical. In my 96 9000 CSE Turbo, the symptoms were that the engine would start and intermittently lose power while driving; meaning that the voltage would drop from 13.6 to 6.8 while driving so I would lose interior lights, ACC, and instruments but the vehicle would still drive. After stopping and turning off the engine, the car would not restart at times. The engine would turn over, but no ignition.

I replaced the electrical portion of the ignition switch ($75 at a Saab dealership) and was driving within 20 minutes with no issues ever since.

Something to consider and it is a very quick replacement.

Cheers,
E~
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  #13  
Old 7th September 2007
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Quote:
Originally Posted by TwinCities Turbo
Replaced the battery and still no go? That should rule out the Starter as a possible culprit since a fully charged battery would be enough to overcome a weak starter or one that has a parasitic drain on the battery. good to know can rule out starter then

Engine turns over, but does not start? Possible that the Alternator is to blame, however you would still be able to jump-start the car if the Alternatort were draining the battery. tried to jump already

Other possibility that I have encountered recently is a defective ignition switch. The switch has two halves to it, the mechanical and the electrical. In my 96 9000 CSE Turbo, the symptoms were that the engine would start and intermittently lose power while driving; meaning that the voltage would drop from 13.6 to 6.8 while driving so I would lose interior lights, ACC, and instruments but the vehicle would still drive. After stopping and turning off the engine, the car would not restart at times. The engine would turn over, but no ignition. seems to have full power to the lights acc and such

I replaced the electrical portion of the ignition switch ($75 at a Saab dealership) and was driving within 20 minutes with no issues ever since.

Something to consider and it is a very quick replacement.

Cheers,
E~

update:
i replaced the spark plugs still wont start
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  #14  
Old 8th September 2007
Scanny Scanny is offline
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I had the same problem a few months ago so I changed all the usual suspects,fuel filter,plugs,cps etc etc etc and still no joy.As a last resort before taking the car back to SAAB I decided to have a thorough check of the throttle body and injector rail. I removed these from the car and cleaned them using REDEX and then re-fitted and crossed my fingers,legs,arms etc. The car started first time and has not been any trouble to this date..Have a look at the injectors and throttle body and give them a clean as I did.Its definately worth a shot........
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  #15  
Old 8th September 2007
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Well, $30 at AutoZone is what I paid for a ratchet driven Torx bit set. Worth every penny too, so much easier to work with than those screwdriver or pocket-knife torx tools. I think it was the 12 most common Torx sizes in a rubber case.

-zen



Quote:
Originally Posted by Frank_Drebin
You can pick up a set of Torx bits at Autozone for less than $10. They also sell loose torx bits for a few $$ each.

Last edited by zenbeer; 9th September 2007 at 08:02 PM.
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  #16  
Old 9th September 2007
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update

so i took out the dic put a spark plug in it, grounded it and tried to start the car and there is no spark

i talked to a saab tech over the phone, and he thinks its the ignition module


what do you think earthworm?
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  #17  
Old 9th September 2007
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I don't know if this is applicable for Saab's but in a Neon, you can crank the car and touch the plug wire to something metal and if it worked correctly, a spark would jump to the metal. Figure out if you are getting spark. If you are getting spark, then check fuel. IF you are getting fuel, then I don't know what the hell to do! haha!

Best of luck to you. Can anyone verify if removing a plug wire and touching it to metal while having someone else crank the car will generate a spark on Saab's?

Cheers
Sno
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  #18  
Old 9th September 2007
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Quote:
Originally Posted by snoborderphx
I don't know if this is applicable for Saab's but in a Neon, you can crank the car and touch the plug wire to something metal and if it worked correctly, a spark would jump to the metal. Figure out if you are getting spark. If you are getting spark, then check fuel. IF you are getting fuel, then I don't know what the hell to do! haha!

Best of luck to you. Can anyone verify if removing a plug wire and touching it to metal while having someone else crank the car will generate a spark on Saab's?

Cheers
Sno
um, thats basicly what i just did

no spark.
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  #19  
Old 9th September 2007
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If you have no spark at the plugs, then follow the problem back to the ignition coil module. The tech is probably right, replace the module; that is the next step in the line of progression. You could also maybe find one at a junkyard and use that.

Cheers
Stephen
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  #20  
Old 9th September 2007
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Quote:
Originally Posted by doorcheese
update

so i took out the DIC put a spark plug in it, grounded it and tried to start the car and there is no spark

i talked to a Saab tech over the phone, and he thinks its the ignition module

Well, maybe I am anal, but I would check the hot lead to the DIC..99.9999% of the time it is fine....
Then I would check out the CPS(crank position sensor)..as a precaution..

With the older cars, a wet plug is indicative of no spark.
That is why the advice for pulling the plugs and examining them.
As gasoline vaporizes quickly, the extraction has to be done quickly..

what do you think earthworm?
These DICs seem to last 100K give or take...If I were planning to run the vehicle from 100 to 200K, I would fit a new DIC, a new CPS and a new fuel pump.
Admittedly, checking for a wet plug may not work due to the emissions control system... I am not positive......
Quite often, a CEL is emitted when the DIC fails and there is unconsumed gasoline (emissions)..
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