I think the bolts will be an easy check. I'll just remove them and try. After that I'm going to follow electrical troubleshooting in manual

 

Feeling better today. Was troubleshooting Vvt codes yesterday and after many start and stops engine started running good and all codes disappeared. Had to wait till last night to get hood on and I now have car blocked in. Will be taking out later today for test drive and will update. Keep fingers crossed for me

 

Sounds good Dale. I can't cross my fingers because I'm working on my car today, but I will try to cross my toes.

GOOD LUCK.

 

Here too

Good luck!

 

Good Luck! Let us know !

 

News is not good. After about 15 miles 1384 and 1396 codes came back. I have a couple things to check tomorrow. I'm thinking it's electrical because it's now erratic

 

Dale, refresh my memory. Did you have these codes before you did the work on your car or did they show up after the repairs?

 

I have had them since I bought car last June. Had a Vvt solenoid that was broken in half and a bad wiring harness. Replaced both solenoids and repaired harness. Thinking I may have a bad solenoid cause yesterday when I plugged in left solenoid my voltage would drop drastically but then started running good and no codes till test drive today

 

Tell you what. I send you a couple of spare solenoids Monday and you should get them by Wednesday. Use them to see if yours are bad.

 

Thanks a bunch. That would be wonderful

 

Here's something to chew on. If I plug in a bank Vvt I get app 12 v. If I plug in b bank voltage drops to about 2 v

 

Dale,
What voltage do you get across both solenoids with everything hooked up? I'd expect it to be low in both cases as the solenoids should be de-energised at maximum retard (i.e. engine not running or at tickover).

The 12V on one side might be the ECM responding to a 'missing' solenoid. I'm not sure it's significant

Mike

 

Good news to report if someone can figure it out. Unplugged b bank Vvt solenoid and test drove. Constant CEL and restricted performance. Plugged b bank back up and unplugged a bank. Car ran like a dream and threw no codes. Stopped and plugged both in and got intermittent CEL and restricted performance. Bottom line when a bank Vvt solenoid is hooked up car throws codes

 

Thinking...
What voltage are you seeing at the solenoids (engine not running)? Low across both?

 

When a bank is hooked up voltage is high. When b bank or both are connected voltage is low so I'm thinking a bank solenoid is not working. Wanting other opinions

 

It's possible that you have a faulty solenoid:- You could compare the resistance with the other bank while you wait for BobRoy's to arrive.

I'm trying to reconcile a fault on one bank throwing codes for both: I'm reminded of this from the training manual on Gus' font of all knowledge:
Jaguar V6 / V8 Engine Management #881

"In normal operation, the ECM uses the inputs from the crank sensor and the A bank cam sensor for cylinder identification
and ignition/fuel synchronization. If the A bank sensor system fails, the ECM switches to the B bank inputs. If
the crank sensor system fails, the engine will start and run using the inputs from both cam position sensors." (my emphasis)

What it doesn't say is what exactly constitutes a failure and which codes might be thrown in this scenario. I'm wondering if Bank A is not sensing correctly. Oh for an oscilloscope...

Fit the replacement solenoid and take it from there. Hopefully someone with more practical experience will chime in.

Mike

 

You have 2 actuators but the ECM only 'sees' the 'B'bank. (Bank 2 or the 'left' bank)
There is no CMPS for the 'A'bank on the AJ26 Engine Management.

Sounds like a faulty VVT actuator or circuitry for the 'A'bank. SWAP the VVT actuators and see if the fault follows the actuator??

bob

 

Bob,
Isn't VVT solenoids poking out of cam cover the AJ27, or have I missed something?

I know it's a different arrangement to mine, which is why I cant help with comparative tests


Thanks,
Mike

 

Thank you all for the continued input. I have 2 solenoids on the way so soon as they get here I'll get back into it and hopefully resolve this

 

Boxed up and will be sent priority mail tomorrow.