adrock702

Hey everyone newbie here. So im trying to fix my car to sell (2006 c230 sport). I haven't driven it in about a year but when i was driving it, it had problems starting and would idle really low at times. When I put in it park it would automatically rev up really high around 4k rpms for no reason. I bought a new car so I stopped driving it and just let it sit in my garage cause the dealer said they would only give me $1000.

Now I went to try and start it the other day and it wont start. I charged the battery over night on a trickle charger to see if that was why. No luck still. I ran the codes and got error on both lean bank 1 & 2, codes for all cylinders missfiring, crank censor position A. The car has 185,000 miles on it too by the way.

So here's what ive done so far....

I replaced all the plugs and coils, fuel pump and filter, and crank censor and the car still wont start. I checked fuel compression and that is fine but when I checked for spark i wasnt getting any. I'm led to assume that it is the censor somehow like maybe I got a bad one from amazon or something.

Is there a way to test it or is there anything else you guys think I should try? Like I said, it did run before I let it sit in my garage for a year without driving it but not very well. But it started. I cleared the codes as well and i dont know how to see if that crank code reappears if i cannot start the car and let it run through a cycle. Any help would be appreciated. Thanks

c300white

Not sure - but I would do smoke test for vacuum leaks next (there are lots of videos on YouTube how to do that) , try disconnecting MAF (unlikely to be that - but easy to check) and then look at throttle position sensor ....

Alfadude

Could it be the battery? If it sat for over a year completely dead it might not hold enough charge to start the car.

Demvang

Does it have enough fuel? Over a year, there could be loss in the tank. Also, try a fuel treatment.

Alfadude

Or the fuel could just be bad after that length of time.