Rough Idle and stalling
 

A friend came by with his 92 and he's having issues with rough idle and it stalls when slowing down. His CEL comes on with and i checked the codes for him and it popped up 34( EGR solenoid valve inoperative) and 37 (O2 sensor 2 LH side)

My question is, is that is the O2 sensor the left side facing into the engine bay or sitting in the car?

And if it is the left side O2 sensor does this have any relation to why the EGR is faulty. I'm also suspicious that it could be that the pre-cat is clogged and is getting excessive back pressure and hence the reason for the bad idle and does fine when accelerating.

And how do i go about fixing the problem?, replace the O2 sensor and check the codes and if the code still pops up, should i assume the cat is clogged and replace that?

Re: Rough Idle and stalling
 

The left side of the car is as viewed from the driver's seat, looking through the windshield. As in, the steering wheel is on the left side of the US cars, hence the term "left-hand-drive". O2 sensors don't usually cause rough idle ans stalling. symptoms usually are changes in performance and poor gas mileage.

It my just be the EGR solenoid, not the EGR valve itself. Check to see if it is unplugged.

http://www.subaru-svx.net/forum/showpost.php?p=689230&postcount=25

http://t3.gstatic.com/images?q=tbn:A...ydqdF6-B3G3Mjw


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Re: Rough Idle and stalling
 

Ok so if this isn't causing it and the pre cat isn't bad. Then my next guess are coil packs