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MIVEC not working......

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81K views 194 replies 35 participants last post by  razorlab  
#1 ·
A little background first,

2008 GSR (bought in January)
36xxx miles
Full bolt ons
Rickerman basemap (can't continue tune with Chet until I get this issue resolved)

I've been popping P0014 and P0011 CELs (exhaust and intake VVT system target error). I've replaced the oil control solenoids, cam sensors, and ECU. Timing chain is new, oil passages are clear, MIVEC sprocket mechanisms are manually operable.

Judging from my logs of target vs. actual on the cams, it seems MIVEC is not changing the phase angle of the cams. There's a hell of a lot of sloppily applied RTV on my timing chain case and oil pan, I guess from the timing chain install. I'm wondering if the oil feeder filter being clogged could cause this and also what's needed to check/replace it?

Quick log from tonight attached. Just check out the target vs. actual VVT

Thanks
 

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Discussion starter · #4 ·
Idles fine. I read that writeup on bearing clearance issues causing the idle to stumble. Could that be a possibility even though my idle is stable?
 
Discussion starter · #8 ·
So, it's still retarding timing then. If you unplug the VVT oil solenoid does the car then run like a dog on idle?

It could well be something as simple as a pinched wire from betweem the plugs on the solenoids back to the ECU harness. Have you checked continuity across all those lines back to the ECU and fuse box? MFI relay from memory.
I'll try unplugging the solenoids and seeing what effect it has. I replaced the MFI relay with the updated gray one after seeing the TSB and seeing in the service manual that the VVT system routes though there.

As far as checking continuity in the wiring, do I just pull the insulation off and check for visual breaks? Or is there a way I can check with a voltmeter?
 
Discussion starter · #10 ·
After going over everything and seeing what you have replaced I think your exhaust cam MIVEC internals aren't sealed. Oil pressure keeps it advanced and if the pressure isn't high enough the spring retards it. I've seen a few that are cracked or the little seals inside get twisted up.
Would that also explain why my intake cam is static? Thanks Hollywood. Would that require a new cam gear?
 
Discussion starter · #11 ·
The mitsu tech I trust wonders if my timing chain could be off at the crank. This whole thing is driving me insane. I'm afraid I'm going to start ranting to myself and posting videos of finger dancing light glove videos like Mazzab did in his build thread
 
Discussion starter · #14 ·
If his solenoids are down and he is getting those errors still, then yes the ECU will pull about a million degrees of timing.
McCoy, I did what you advised and unplugged the solenoids. The first log is at idle with the exhaust oil control solenoid unplugged and the second log is with the intake side unplugged. The results are the same regardless. WTF?
 

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Discussion starter · #17 ·
Having a very similar issue, my Evo is the same year 08 SSS gsr. So I hope we can figure out this problem. The only difference is mine is only giving a p0014 code. I had the timing chain replaced a little over a month ago, they said there was nothing else wrong. Blah, either way I've had this code for over a year now and would love to resolve the issue.
Mods? Running stock map? Replaced the cam position sensor or oil control solenoid?
 
Discussion starter · #19 ·
actual
I have a similar issue. Intake cam likes to randomly advance way off target....

Recently rebuilt the motor - new timing chain and gsc s2 cams, full valve job and new springs retainers.

how about you guys. Any recent work before this code other than timing chain replacements?
Nothing that I can tell. Just bought the car in January. Starting to think it's a wiring issue since I've replaced the cam sensors, oil control solenoids, and ecu. Oil pressure shouldn't be an issue cause my cams are spot on at idle. So that leads me to believe the wiring to the solenoids is toast since they both split from the loom at the same point. There is also no difference in phase angles with the solenoids connected or disconnected, logged target vs. actual in Evoscan
 
Discussion starter · #33 ·
Now I am thinking there is something blocking the oil passage to the exhaust mivec!
Time to take the head off and check the oil control filter in the block. That's what I'm about to do. MiVEC oil pressure is a secondary system to overall engine oil pressure. So, while I have optimum engine oil pressure, my cams are not getting the oil pressure they need to alter the phase angle and reach targetVVT.

Since my ECU is new, solenoids are new, cam sensors are new - I'm going to be thoroughly checking the actuators (cam gears), oil control filter in the block, oil passages, wiring, timing. And I figure since I have it apart, I'm going to throw in some GSC S2s, beehive springs and retainers in preparation for a MAP ef3
 
Discussion starter · #37 ·
You guys are awesome. I really want to figure out this issue. I've seen a bunch of X owners that have been haunted by this. My thread is really in depth and I have a lot of info posted. Hoping I can tear my motor down and fix the issue so I can mod and tune to my plans.

I have full bolt ons now and this is my plan:

93 oct
MAP ef3 with all the porting options and antisurge housing
FIC 1100s (on the way, bought from toolegit86, great guy to deal with)
Walbro 255
GSC S2s with GSC beehive springs and ti retainers

And finally, let Chet actually tune!!!! He's been super patient and has said that as soon as I get this issue resolved we can finally log and revise. Such an awesome tuner -- responds to emails within 10 mins, answers tons of questions and seems to operate based on his love of automotive awesomeness and not the almighty $$$. He steers you toward what can maximize performance while keeping safety and reliability in mind.

That being said, I'm shooting for 450/360. Going with the bigger turbo to keep the torque spike down and from what I've seen, Chet can help get peak boost near 4k. Keep in mind I've had my Evo for 6 months and it's always had this MiVEC issue. I've never gone WOT and my boost never goes over 10psi to avoid damaging something. My dad's IX pulls like hell and I can't wait to destroy him MWAHAHAHAHA!
 
Discussion starter · #46 ·
To be honest, I started pulling it all apart and got sick of it. I need to continue the tear down, it's just a matter of finding time, and getting the drive to give a shit about the car again.
I know it sucks but hang in there. Aboit to get my evo in the shop for the tear down process. Fingers crossed


-- had a '97 prelude rev me up tonight so I can't wait to make my X a monstar
 
Discussion starter · #55 ·
Good idea. My engine oil pressure is in spec. The MiVEC oil pressure is a different system that shunts off the main oil passages in the block. There's a small filter in the block that I can only assume is clogged partially since I've ruled everything else out.

Poon, make sure to read the justanswer.com thread I posted eralier in the thread as it has a lot of useful info. Also, is it exhaust or intake cam timing or both?. If you have engine oilpressure issues it should advance and cycle into super lean afr at idle.

Oil pressure gauge is a must. Plus it motivated me to build a sweet ass custom a pillar pod :)
 
Discussion starter · #57 ·
My tuner is saying the timing is retarding plus the P0014 code. My P0011 code went away once we retaught timing with the MUT. Hiboost was saying he flushed his motor, did an oil change, and it looked like it solved the issue. If I am not getting enough oil pressure on the exhaust side would it retard timing?
P0014 is for exhaust side. That actuator (cam gear) is spring-loaded so low oil pressure would leave the exhaust cam timing in an advanced state.