99 W900 KW 3406e cat

Ok, its a 40 pin engine. It also may be the timing sensor acting up...sometimes it will throw a code, sometimes it wont.

 

Ok like i said be careful, you can cross thread it putting it in. If you buy one make sure it comes with the o-ring that seats around the base of the new check valve. Lube o-ring with fuel not oil.

 

Yes, should of called it that, LOL....Its a good idea to carry one of those with you so it won't leave you stranded. The 40 pin engines use only that sensor to run, when it fails your done. Not like a 70 pin engine that uses a crank and cam sensor.

 

Try the check valve first. It doesn't cost much...bout $35.

 

Here's a pic where its located at where my finger is pointing.