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(2011 GT) VCT's not changing

Unread postPosted: Wed Apr 26, 2017 6:13 pm
by bunso
I recently built a coyote for a buddy and his tuner is complaining about the cams not moving on the log. The VCT's on the log stay at or around 0. It has thrown a code once Po0012 for itake camshaft overadvanced. The car runs pretty damn good even with this issue. It's really hard to believe that it could be a tooth off on one of the chains with as good as it runs but I guess anything is possible. Verified good oil pressure, tripple checked all harness connections, verified all ecu grounds, voltage at the VCT solenoids but no grounds. I'm assuming the ecu varies the ground but my voltmeter isnt fast enough to keep up.

Anyone had an issue similar to this?

Re: (2011 GT) VCT's not changing

Unread postPosted: Fri Aug 04, 2017 2:04 pm
by bunso
For anyone chasing an issue like this the verdict ended up being one of the plugs in the end of the head pushed out and the oil pressure was too low in the heads for the phasers to work properly. The oil pressure switch on these cars are below the heads so it showed great oil pressure which made it harder to diagnose this issue. Looks like the guy that built the heads for us used a set of cheap plugs that weren't the correct size.

Re: (2011 GT) VCT's not changing

Unread postPosted: Fri Aug 04, 2017 4:27 pm
by decipha
damn good find