some thoughts -
Vehicle is STOCK - no added electrical . Nothing plugged in, modified or added.
Did you scan for codes - ALL modules? Post ALL codes we will interpret .
Alternator - what tests were done ?
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Hello:
I own a 2001 Saturn LS300 with the 3 Litre V6, with approximately 100,000 miles. The primary symptom is that when the car is in gear and should shift up it dies! I have no problem starting or getting into either reverse or drive, but once the car begins to move and should automatically shift into a higher gear, say going from 1st to 2nd it dies. If I nurse it along I can get into 2nd but when the RPM's get to where the car should shift into 3rd, it dies. When I can finally get it to highway speed and am cruising at say 70 mph, all of a sudden without my accelerating I am going down the highway at 110 mph, then it dies!
I have discussed it with a transmission specialist who says it is not a transmission problem because it does shift. I have had it to two mechanics who have both run diagnostics but can't come up with a cause and both say they have never seen anything like this before, (maybe they should get out more)! I have discussed it on a specific Saturn Forum and they suggested it might be a faulty alternator, so I tested that and it does not seem to be the problem. I have also been told that it is a faulty neutral safety switch, but none of the research I have done on a neutral safety switch correlates well with the problem, since the vehicle starts and goes into gear just fine. The diagnostic codes suggested speed sensor and low input problems, leading to the suggestion of an alternator issue.
Before I invest an arm and a leg into fixing this, I'd just like to know if there is anyone out there who has run across this before and what the problem might be? I don't want to invest more than the car is worth and I'm afraid that is what will happen if I just turn someone loose on it.
Thanks!
Gaeilge1