Okay so here’s some background on my problem. The infamous check engine light showed its self with the P103 MAF low circuit code.

I ordered new Delphi maf sensor from fcpeuro. While waiting for the delivery of said sensor. I noticed a slight whining sound that sounded like it was coming from the accessory belt area so I go ahead and ordered the serpentine belt.

I replaced the MAF sensor still got the same low circuit code. I replaced the serpentine belt and the tensioner pulley and the whining sound still remained. I bought a mechanic’s stethoscope to pinpoint where the whine is coming from which lead me to replace the drive belt, tensioner pulley and idler pulley all successfully with no issues. I say no issue because I drove the vehicle for a day for two with the whining noise that was getting progressively worse and it would behave erratically at times like lagging when you need it to really go or spooling up when you don’t want it to. I’ve been doing the work myself due to financial constraints, I say this not because I lack technical skills or tools (except for VIDA) to perform the job.

I thought that maybe my tensioner was not tense enough so I’d figure I’d redo it just to make sure. But while removing it I forgot to lock the cams and I noticed that they both sprung back when I loosened the tensioner. after researching forum and such I found very little info about finding TDC on this engine (B4204T11) 2.0 drive e .

After setting both cams to where I believe tdc is with the first cylinder up or not up but TDC set closest to the cylinder top movement… put the belt on and tensioner reinstalled everything and now the car cranks with no start! Only new code is the P103 low circuit on maf sensor. Including some pic and a vid any help would be greatly appreciated thanks