9 captured repliesDiscussion pagination complete · Source accounts, not a confirmed diagnosis
THIS DISCUSSION / SOURCE-DERIVED OVERVIEW
Discussion summary
YOUR RESEARCHNo start - oil gauge pegs to max on key turn
Reported or suspected cause
some corrosion
Reported cause
No successful repair reported for this finding.
1
Identified cause
0
Suspected cause
0
Reported fixes
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Discussions that report identifying a cause
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Reported cause
When I removed and refitted the engine on Pinky I had exactly the same issue, mine was due to some corrosion on the connection to the chassis.
Leading evidence: 'some corrosion' (1 discussions report identifying this cause; no attributable repair resolution). Across 1 matching discussions, the most frequently mentioned possible cause is 'some corrosion' (1 discussions; 1 report identifying it and 0 suggest it). The most frequently discussed action is 'Check voltage' (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.
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Performed · outcome unconfirmed · Original poster
Gentleman haha you were absolutely correct what I didn't expect to see was the engine earth disconnected- I removed it to remove the exhaust weeks ago!
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Suggestion
Confirm by checking the voltage on the engine compated to chassis earth when trying to crank.
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.
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Suggestion · Original poster
Hi folks, I've not had the 996 running for about 2 months the battery has been disconnected and in months old Bosch.
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Suggestion
I detected it by using a jump lead from a good earth chassis point to a point on the engine and the starter engaged.
Discussions that performed work without a confirmed outcome
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Performed · outcome unconfirmed · Original poster
Gentleman haha you were absolutely correct what I didn't expect to see was the engine earth disconnected- I removed it to remove the exhaust weeks ago!
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.
9 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: 20261027T184158Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources
Hi folks, I've not had the 996 running for about 2 months the battery has been disconnected and in months old Bosch.
Yesterday I went move it and it would t start, on key position 2 ie crank all linghts on the dash come on and there is a click but no starter turn. The oil gauge at this point pegs max till the key is released!
I assumed the battery and charged overnight but not sure any thoughts?
Engine to chassis earth connection.
With a poor connection the current can't flow and the engine is not being held at 0v by the chassis connection. Since the engine is not at 0v the earth for the oil pressure sender is no longer 0v which gives the dodgy oil pressure reading. Lights are on on the dashboard because battery is good but the poor earth won't allow enough current to actually start the engine.
Confirm by checking the voltage on the engine compated to chassis earth when trying to crank.
MC
Gentleman haha you were absolutely correct what I didn't expect to see was the engine earth disconnected- I removed it to remove the exhaust weeks ago!
How daft am I! Thanks for the help!!!
No problem. When I removed and refitted the engine on Pinky I had exactly the same issue, mine was due to some corrosion on the connection to the chassis. It took a bit of head scratching and thinking before I worked it out. Always easier to diagnose the second time.
MC
Had a similar problem with my Audi but I knew teh battery was good. It was an earth issue to the engine/starter motor.
I detected it by using a jump lead from a good earth chassis point to a point on the engine and the starter engaged.
Rather than investigae the corroded earth strap to the starter somewhere underneath I bought a £5 Neg earth short battery lead off eBay and connected it from body to a generic part of the engine :grin:
Funnily enough, I reported a wobbly oil pressure reading from time to time before I last had my car serviced. The mechanic said he'd cleaned up the earth lead connection, as this can cause probs with the reading. Sure enough, its been much better since.
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