I finally have the time and energy to spend on some troubleshooting that does not
have to do with urgent problems that will keep us from driving the car! Woot. :P
Our '91 SSE with the 3.8 liter MFI engine had an intermittent SES light for months, which eventually became a constant one a few months ago. When I pulled them, the trouble code explanation didn't make much sense. Drivability was almost unimpaired, so I let it go in favor of a bunch of other crises.
The only problems I detect are:
- A slight loping in the idle in drive with the brake on
I think the rpm doesn't drop down to idle quite as fast as it should when you jazz the engine in neutral
The cruise control shows all the signs of not having enough vacuum to operate; it loses lock if you have to climb even a slight grade (throttle open) for too long.
The trouble codes are:
41: Cam Sensor Circuit
46: Not listed...
The cam sensor thing is new to me. I've located it on the block according to the (almost but not quite useless) Chilton'* manual. Is it just a straight up replacement?
Is there a better list somewhere that explains the 46 code?
I also suspect a vacuum leak somewhere, but I've never had to track one down before that wasn't obvious, which this one isn't. Can I have some help with that troubleshooting procedure? I recently bought a vacuum testing kit, if that might be useful.
I would be thankful for any assistance digging into all this.