9 captured repliesDiscussion pagination complete · Source accounts, not a confirmed diagnosis
THIS DISCUSSION / SOURCE-DERIVED OVERVIEW
Discussion summary
YOUR RESEARCHFuel gauge stuck at 3/4 after fuel pump install
Leading reported evidence
Check over
Suggestion or failed attempt
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 contain suggestions
1
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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.
Leading evidence: 'Check over' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Check over' (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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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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0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.
Suggestion
If you disconnect the battery on a C4, C4S or TT with under 1/4 tank - you will need to get the tank re-calibrated using a PST2 or 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 contain suggestions
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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.
Suggestion
If you lose that calibration setting by disconnecting the battery (with a low tank) the tank/cluster has no guess as to remaining fuel and MUST be re-calibrated.
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
0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.
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Suggestion
Those cars use a "saddle bag" gas tank and the sensor is only on one side.
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
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.
Suggestion
If you disconnect the battery on a C4, C4S or TT with under 1/4 tank - you will need to get the tank re-calibrated using a PST2 or PIWIS.
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.
Suggestion
If you lose that calibration setting by disconnecting the battery (with a low tank) the tank/cluster has no guess as to remaining fuel and MUST be re-calibrated.
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.
Rennlist: 1 discussions
0 evidence records excluded for query context · 0 excluded by outcome qualification · 0 adjusted by outcome qualification.
2 acknowledgements have no verified action link; they do not establish a repair result.
Outcome without a verified action link
I ran out of gas last night due to this issue - and poor recordkeeping on my part since it's been non-functional - so it'll be really nice to get this fixed.
After installing a new fuel pump in my '99 996 C4, I find that the fuel gauge is stuck at 3/4. From Googling and reading the Essential Companion I find that this can be an issue with the mk1 996 if battery power is lost when the fuel level is low, and I've done the things I could do (refill tank completely, disconnect battery overnight, pop off the fuel tank cover in the front trunk and verify that the electrical connectors are properly connected), but my gauge is still stuck at 3/4.
I have an appt Monday for with my shop so they can fix whatever's been done, but if anyone has a suggestion, I'd love to hear it. I'll be doing a long drive this weekend, and a working fuel gauge is a nice thing to have...
32 views and no answers? Y'all are killing me.
I ran out of gas last night due to this issue - and poor recordkeeping on my part since it's been non-functional - so it'll be really nice to get this fixed.
Same thing happened to me a couple years after I got my 2000, well except I was on track in the desert at Willow Springs & the gas gauge showed 1/4 full which is what I shoot for on timed runs. The needs to be recalibrated with PST & a full tank.
I'm not sure about how Porsche sender works but I had Mercedes where the float ball inside the tank got gunked up and stuck... Solution was to dump a bottle of techron in the tank ... Fixed the problem for me ...
Check over on Renntech about this issue. It should have recalibrated when you did all the above things.
If it was stuck at 1/4, that would be one thing, but at 3/4 maybe as someone else said, the sender is stuck or has failed.
Best of luck. Let us know what it turns out to be.
Cheers,
TomF
From Renntech.org
http://www.renntech.org/forums/topic...on#entry103124
If you disconnect the battery on a C4, C4S or TT with under 1/4 tank - you will need to get the tank re-calibrated using a PST2 or PIWIS.
Those cars use a "saddle bag" gas tank and the sensor is only on one side. So one side of the tank is "estimated" on the fuel gauge - based on the a specific amount of fuel in the tank at calibration time.
If you lose that calibration setting by disconnecting the battery (with a low tank) the tank/cluster has no guess as to remaining fuel and MUST be re-calibrated.
I think I read it assumes 19 liters in the tank after battery disconnect? Couldn't find it again. Might be a way to get it back on track. Empty tank add 19L disconnect battery.
