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2004 9-5 Arc Wagon Sport-Combi 2.3T
I have a good one for you all and any help is much appreciated.
I have taken on the role of Mechanic for my Saab since the ones at the repair shops where I have taken it seem to mess up more than they fix. I figure I can do that much.
The issue I am having with the car is a starting issue.
The car powers up and turns over when I turn the key no problem, and it even starts up, but once it starts, it will initially rev then will immediately bog out, the engine will stop running.
As of today the car starts on the second or third attempt (after a bit of cranking over) and stays running. When running it runs fine, even when stopped at a light, or idling.
Having searched the forum I believe have ruled out some of the usual suspects:
1) CPS had it tested (checked, replaced problem still exists)
2) I had the fuel pump checked and the mechanic seemed to rule that out too.
3) I cleaned the throttle body from the top. I did not remove the throttle body from the intake manifold for cleaning. I used choke cleaner and a toothbrush, and got the inside of the TB inc. butterfly sparkling. I replaced the o-ring between the TB and the air intake hose (the old one was completely stretched out and not where it was supposed to be). The car was a bit tough to start after that but once it did start, I took it out for a 210 mile drive and worked the intake pretty good (up to just over 100 mph on the open road). Aside from a slight wobble which I am going to attribute to a wheel balance problem the car handled admirably.
4) cleaned the Mass Airflow Sensor
I had really high hopes for the TB cleaning and o-ring replacement as a fix but alas I still have the starting problem.
To complicate things or possibly clarify a bit, it seems that the starting problem happens when the temperature is warm (warm being ~60 deg F or greater). During the past cold snap that car seemed to start fine on the first turn of the key, but if the outside temp is above 60 deg F the problem seems to show up.
Over the past weeks I have been recording the ambient temp and the starting success and it does seem to show that temps less than 56ish starts fine first turn of the key.
temps greater than 60ish car doesn't start on first turn of key but starts fine on the second try.
Today, With ambient air temp ranging from 60-65 deg F the car does not stay running after the first turn of the key.
She starts and then bogs out.
It started fine this morning on my way to work. but leaving for lunch and then leaving from lunch back to work she was giving me difficulty.
The car does start and stay running on the second turn of the key.
I am beginning to believe that ambient air temperature is a key factor, since yesterday the car started fine all day along and the temps were below 57 deg F.
This seems to be the cutoff point warmer than 57-62 the car has starting problems, cooler everything is fine.
Can someone point me to any sensors and their locations that I can check / clean/ replace that would be temperature dependent?
Any thoughts on what my next course of action should be?
posted by 198.85.23...
, Mon, 8 Mar 2010 14:14:36
, Mon, 8 Mar 2010 13:00:11, Mon, 8 Mar 2010 14:33:14, Tue, 9 Mar 2010 16:46:56
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