VVT and cam timing help needed
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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
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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
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
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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
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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
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
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