Verified with VCM scanner, exhaust cam error angle still acting up after changing VVT solenoids, will replace exhaust cam sensor and check again.

 

Replaced Exhaust cam sensor. Angle error still seems to be acting up.
So I went looking at my past scans and was able to compare, cam angle/ error seems to be the same on start up at least.

I'll grab a scan tomorrow morning when it's sat all night see what happens.

 

nm I do see a large difference between those and the previous posted log "jan 7th 2024 no start", this could work maybe

 

And I think it did work! Would like one more really cold start to verify but I think it's fixed! Ty so much JapEatr for taking the time to help me out, I really really appreciate it.

 

man that’s awesome im glad to help. Subscribe to my YouTube channel in my signature!

 

Done! haha

 

Sill how it never stored a code, all my cam correlation DTC are active on this file. Looks like it was failing some sort of position precheck

 

Stalled on start up again nooo, will have to bust out the laptop

 

Here are the instructions for relearning the crankshaft position sensor without a scanner. Start the car and put it in neutral for 2 minutes. The put the car in drive and drive around for 15 minutes at a constant 55 mph do not go under 55 or over 55mph. Try to find a long straight road. Then slow down to 45 mph by taking your foot off the gas but coast to 45 mph for 25 seconds then speed up to 55 mph for 15 seconds remember no braking. Repeat this whole process three more times. Then park your car put in neutral and idle for 2 minutes. This should cause your crankshaft position sensor to relearn your car's crankshaft position.

 

I can probably just use a snap-on tool tmr.

I spent all night looking at logs. Cam error/ angle is doing the right thing during this precheck but the values just seem to be much higher right now

 

crank relearn took, I guess we will know if it worked later today or tmr morning once it's sat for a while.

 

Barely started after work was nasty cold. Ill fire it up tmr morning and post a log.

 

No avail, still ran into some no starts over the weekend. Flashed my summer tune which has VVT turned off, still didn't start.
I am gonna put a warmer thermostat back in it really soon, currently runs way too cold.

maybe I should pull the valve cover see if my timing chain has play?

 

Might try to check trans fluid level too, maybe torque converter doesn't have enough fluid?

 

Im thinking the CPS ring on the cam has moved/spun

 

Poop. If I pulled the valve cover would I be able to tell?
might be a good enough excuse to get some cams lol or a ported head.

 

may have to put at TDC (cant remember #4 or #1) and look at the tone ring in relation to the CPS

 

okay, I’ll try to tear it down hopefully next week verify and swap some cams if need be.

was in the shop this evening and it did the no start thing hot, which was a first. Scary..

 

pull valve cover and take a look

 

Looks like it’s in roughly the right spot

 

It’s 180 degrees upside vs this but looks the same.

 

Got a new cam in front of me and it looks the same, if its off its gonna come down to a single millimeter

 

Spent all night thinking and looking over logs...
-Before replacing the intake cam position sensor, I was getting some really high angle/ error values in the 50s.
-After replacing both sensors, the values reported and how they behave on start up appear to be the same now as how they were acting going back years.

So I don't think it is cam timing anymore, position sensors were very dirty so they've definitely benefited from being replaced, possibly could have just been cleaned but oh well.
So I suspect a third problem is at hand.

The car does start, fires and flares up, surges and stalls on its way to target idle speed.

 

maybe a vacuum leak or manifold leak ? will it idle if you pedal it?

 

Yes and no. Sometimes it dies so quickly that throttle seems unresponsive.
Other times it gives me a little bit of time and yes throttle helps and throwing it into gear pretty much stops 90% of it.

I doubt a leak at the manifold/ TB or intake tube, its solid. But maybe on the emission side way at the back, possibly could have something going on back there
I'm gonna pull my MAF, bring it inside give it a good clean and inspection under a light and glass. Maybe I've missed some debris on it, IDK