98, 2.8,5V, the codes are 1338, 1138,1136 and 0411. Two things I put a can of old gas (from summer) in and also drove home in the snow and got a lot of snow up in the grill. Next morning the check engine comes on. Are the codes related to each other? Where should I start?

 

Start with clearing the codes, and see which one(s) come back after driving for a couple days at least.

 

Cleared the codes and they came back the next tome I started the car.

 

so now that it has been a couple weeks when you clear them how many come back again? By now you should be on fresh gas and different driving conditions.

 

Cleared codes after driving about 150 miles. the codes that came back are 1338-cam pos cir open or short to B+(bank 1),1138 & 1136-fuel trim to rich at idle Bank 1 & 2 and 455-Evap large leak detected.

 

Sounds like cam sensor and a vacuum leak to me. If you can, go to a pick and pull and grab a cam sensor. Make sure they have the same serial on them, and the yard shouldn't cost you more than $5-10.

Next is try to find the vacuum leak. Not much else you can do other than stick your head in the engine compartment while the car is running and listen for the leak. I've heard about spraying WD-40 or something in the compartment and look for bubbles (but I can't remember what substance they sprayed, so better not try that without knowing).