Progressive stutter and no boost

[hardcorandy]

Car started to stutter a bit at idle a few days ago. Ive felt the performance drop rapidly. Over the past few days its gotten worse. Having a hard time getting it to hold an idle and now the tdo5h 20g is super laggy and wont start to spool till 4,500. When attempting a hill the head sounds like it has that honda chatter. Wideband is showing 10.3 at 3k half throttle with no boost.

Ive done a boost leak test. No leaks. Used soap on everything, including injectors seals and all that. Compression is 160, 155, 160 155. Turbo have 5k on it with no play at all (built by Justin).

I started the car up and unplugged the maf. Idled like a champ. Replaced the maf with a good known spare. Same thing. So im pointing to some sort of electrical issue. Any thoughts on what to check next?

 

[hardcorandy]

Im getting down to the wire and losing my patience. Changed out the knock sensor because the other one looked bad. No difference. Checked the ecu. Played around with a timing gun to find out where the miss was coming from. Turns out all the cylinders are missing randomly and the pulse of the light seems to change without idle speed changing. Basicly the ignition is just going haywire.

 

[DSM JIM 98]

Could be spark plugs are bad or fouled. I'm also having my car studder when it starts boosting

 

[3kgt2nv]

for something quick to check that can cause hell is the temp sensor for the ecu. if it died it will tell the car to run stupid rich to help with warm up. That will cause plugs to foul and cause all kinds of mayham.

 

[95g-s-x]

CAS or CPS going bad?

 

[hardcorandy]

Turns out the crank jumped time. Why? I have no idea. Tensioner is good. Pulleys are good. Everything checks out. Not due for 25k yet and its all oem. I didnt bend anything thank god and have 155 compression.