1992 Saturn SL2 I'm not sure if this is electrical or maech

MNFERGUSON

MEMBER
1992 SATURN SL2
4 CYL
FWD
AUTOMATIC
158,000 MILES

I have a 92 saturn SL2 dohc automatic. When I put the car into reverse it clunks while I am backing up. Also when driving the car the tachometer fluctuates without revving of the actual engine only the gauge tidals. I replaced the MAP sensor about 2 months ago when it was doing this before and it stopped until now, except then it would die after the gauge went crazy (although it would start right back up). I just replaced the transmission and the engine was replaced about a year ago. I am getting 3 codes from the car: code 26 Quad Driver Module faulty, code 32: EGR malfunction and code 52: (tranny code) Hold mode stuck on. I have been told that code 26 is common and that it usually leads to EGR valve being replaced however I do not know if this is associated with my symptoms. Could it be a bad PCM?

1 Reply

SERVICE WRITER

MECHANIC
9,123 POSTS

I associate the quad driver as more of a pcm problem than EGR. But that is in my experience. Having said that, I haven't run into many pcm problems on saturns. I have heard of the egr solenoid being a problem with two of those codes.

With this particular vehicle, I would take a look at the coolant temperature sensor. These are notorious for causing a variety of problems. They tend to crack. IT is a $10 part that is worth putting in, unless you have recently done it.