Going down the freeway and truck stalls shortly and check engine light comes on. Then it didnt want to go over 50 mph. Took it to auto zone to get scanned and came up with 3 codes (p0335-crankshift position sensor, p0326-knock sensor condition& p0300-misfire in random cylinder) i figured i would come to you guys first before i get robbed by a mechanic.Thanks ahead of time for any help or experience with this issue!

 

I'm going to ask if you've recently change anything or added/deleted parts?

Chris

 

I am not a mechanic, but I would wonder if the crank position sensor code is causing the timing to be off creating the misfire and knock sensor issues? If it were my problem, I'd start there. But I am not familiar with this engine, so take it for what it's worth...

 

Both of those sensors are simple to replace. Unplug, take out the bolt, remove the sensor, take out the o ring.......... Reverse the process.........Put new o ring in, put new sensor in, put bolt back in, plug the wire in. Both of those sensors are about 25 to 30 bucks each. Do it yourself and save a lot of money.

Also, with the random misfire.............have you cleaned your maf sensor, or throttle body lately? Time to do that too. There's some tutorials here on the site that can walk you through that. Once again, do it yourself and save a lot of money. Take the T.B. off of the h3 to clean it, because you cannot clean it while it is bolted to your engine.

 

Thank you guys for the responses. The only thing ive added lately is a K&n Filter. Ive cleaned the TB and the MAF sensor but its been close to 6 months. So plan of action is to get the 2 new sensors and replace them and clean the TB and MAF sensor again and see if theres any diffrence. Ill follow up if problems solved, thanks again fellas.