10 captured repliesDiscussion pagination complete · Source accounts, not a confirmed diagnosis
THIS DISCUSSION / SOURCE-DERIVED OVERVIEW
Discussion summary
YOUR RESEARCHLack of power at top end
Leading reported evidence
Replace ) it shows some irregular values
Performed · outcome unconfirmed
No successful repair reported for this finding.
0
Reported fixes
0
Unsuccessful attempts
1
Discussions
Read evidence and context
Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.
Discussions that performed work without a confirmed outcome
1
0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.
0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.
Performed · outcome unconfirmed · Original poster
Borrowed a friends iCarscan to try and diagnose further - the car is showing NO fault codes, however when you look at the data fro the cam variations (one of the identifiers that was the issue prior to having the solenoid replaced) it shows some irregular values.
Leading evidence: 'Replace ) it shows some irregular values' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, the most frequently mentioned possible cause is 'cause of my missing power' (1 discussions; 0 report identifying it and 1 suggest it). The most frequently discussed action is 'Check bank 1 solenoid hasn't come unplugged (' (1 discussions). For that action, 0 discussions report a resolution and 0 report an unsuccessful attempt. No action has an explicit, attributable resolution report under the current rules. These are forum reports and suggestions, not a confirmed diagnosis.
Source reports, not a diagnosis or a success probability. Counts refer to discussions and can overlap.
Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.
Discussions that performed work without a confirmed outcome
1
0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.
0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.
Performed · outcome unconfirmed · Original poster
The actual cam angle seemed to be a live reading that changed however the deviation was frozen on a fixed number each time.
Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.
Discussions that performed work without a confirmed outcome
1
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Performed · outcome unconfirmed
I wouldn't rule it out until you've had both of them tested with a PIWIS.
Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.
Discussions that suspect a cause
1
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Suspected cause · Original poster
I say false, this is most likely the cause of my missing power but having had the solenoid replaced and the car showing no fault codes I'm inclined to think its something electrical or a sensor rather than something more mechanical but I'm guessing at this point.
Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.
Discussions that contain suggestions
1
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Suggestion
First thing I'd do is check bank 1 solenoid hasn't come unplugged (check bank 2 whilst you're at it as well).
Discussions that performed work without a confirmed outcome
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0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.
Performed · outcome unconfirmed · Original poster
Borrowed a friends iCarscan to try and diagnose further - the car is showing NO fault codes, however when you look at the data fro the cam variations (one of the identifiers that was the issue prior to having the solenoid replaced) it shows some irregular values.
These are separate views of the same evidence. Frequency alone does not establish a fix, and these counts must not be added together.
cause of my missing power
No successful repair reported for this finding.
0
Identified cause
1
Suspected cause
0
Reported fixes
Read evidence and context
Discussions that suspect a cause
1
0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.
0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.
Suspected cause · Original poster
I say false, this is most likely the cause of my missing power but having had the solenoid replaced and the car showing no fault codes I'm inclined to think its something electrical or a sensor rather than something more mechanical but I'm guessing at this point.
Counts describe captured discussions, not unique people or a diagnosis. Author identities are not reliably stored. Exact duplicate evidence is counted once across matching discussions; one discussion counts at most once per action/state. Multiple repairs reported together remain a combination. Suggestions and failed attempts do not establish a fix. Matches cover whole discussions and can include related faults, model variants and incomplete threads.
10 eligible posts · 0 unverified posts · 1 discussions match the subject in their title or opening post.
911uk: 1 discussions
0 evidence records excluded for query context · 0 excluded by outcome qualification · 0 adjusted by outcome qualification.
0 acknowledgements have no verified action link; they do not establish a repair result.
Generation: 20261026T052503Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources
Hi all. My '99 3.4 Cab has developed an issue whereby it seems to lose power in the top half of the rev range. It will get to c.4-5k pretty quickly and then take an age to rev out at 7k, if at all. I used to be able to feel the Variocam kick in at around that point but I can't currently and the lack of power is obvious. I had the Cam Solenoid on Bank 1 changed back in April so I know the symptons (rough idle etc) but the car isnt showing any of those currently so not immediately pointing to the solenoid for Bank 2, unless they behave differently?
There are no fault codes showing. I've had a recent issue with the AOS bellows but this has recently been resolved but wondered if a vac leak could cause similar symptons?
Any ideas on where to start?
TIA - Rob
The sypmtoms you had before with your solenoid were due to it being stuck in the advanced position - rough idle, etc.
The syptoms you have now sound like it's stuck in the retarded position. I wouldn't rule it out until you've had both of them tested with a PIWIS.
Thanks Alex. It certainly feels more Variocam related and having had Bank 1 replaced it woudnt surprise me if Bank 2 was needed as well - just wish they were easier to get at on the .1!
Bank 2 solenoid failing is rarer than bank 1, but your symptoms are opposite than normal. First thing I'd do is check bank 1 solenoid hasn't come unplugged (check bank 2 whilst you're at it as well). Also check your solenoid fuses/relays if there are any.
Had something very similar on GT3, reso flap was stuck closed. Car just didn't want to Rev out. I know it's a totally different engine but symptoms were just as the OP described.
OK, thanks. I've been having a few issues with the AOS bellows and as they are in the same area I wonder if the solenoid harness has been pulled/disconnected. Will take a look later today.
So I got under the car and had a look at the cam solenoid connections and they seem fine. Borrowed a friends iCarscan to try and diagnose further - the car is showing NO fault codes, however when you look at the data fro the cam variations (one of the identifiers that was the issue prior to having the solenoid replaced) it shows some irregular values. On a drive out last night it was 0° when I first started the car and then suddenly showed 1006°! Parked the car up and plugged in again on the way home, then showed a solid -8.25° so I'm guessing something isnt quite right.
The actual cam angle seemed to be a live reading that changed however the deviation was frozen on a fixed number each time. Any ideas on what could be giving/causing the 'false' readings? I say false, this is most likely the cause of my missing power but having had the solenoid replaced and the car showing no fault codes I'm inclined to think its something electrical or a sensor rather than something more mechanical but I'm guessing at this point.
TIA
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