15 captured repliesPartial discussion capture · Source accounts, not a confirmed diagnosis
THIS DISCUSSION / SOURCE-DERIVED OVERVIEW
Discussion summary
YOUR RESEARCHPls help diagnose a non-starting issue?
Reported or suspected cause
water dillution in the fuel
Reported cause
No successful repair reported for this finding.
1
Identified cause
0
Suspected cause
0
Reported fixes
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 report identifying a cause
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.
Reported cause
cause was water dillution in the fuel from a dodgy fuel station.
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
I checked my fuel pressure a couple of months ago and used a gauge that looked exactly like the one in your pic, the brass connector on the end of the rubber pipe (connected to the gauge) screwed straight on, no other adaptors were needed.
Leading evidence: 'water dillution in the fuel' (1 discussions report identifying this cause; no attributable repair resolution). Across 1 matching discussions, the most frequently mentioned possible cause is 'water dillution in the fuel' (1 discussions; 1 report identifying it and 0 suggest it). The most frequently discussed action is 'Check fuel pressure a couple of months ago' (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
I checked my fuel pressure a couple of months ago and used a gauge that looked exactly like the one in your pic, the brass connector on the end of the rubber pipe (connected to the gauge) screwed straight on, no other adaptors were needed.
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
I checked my fuel pressure a couple of months ago and used a gauge that looked exactly like the one in your pic, the brass connector on the end of the rubber pipe (connected to the gauge) screwed straight on, no other adaptors were needed.
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 · Original poster
- a blocked fuel filter (seems unlikely to stop all running)?
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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Suggestion
Turning the ignition on and off afterwards doesn't run the pump.
These are separate views of the same evidence. Frequency alone does not establish a fix, and these counts must not be added together.
Check fuel pressure a couple of months ago
No successful repair reported for this finding.
0
Reported fixes
0
Unsuccessful attempts
1
Discussions
Read evidence and context
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
I checked my fuel pressure a couple of months ago and used a gauge that looked exactly like the one in your pic, the brass connector on the end of the rubber pipe (connected to the gauge) screwed straight on, no other adaptors were needed.
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
With the engine off but the fuel pump running via durametric I had 3.8 bar which is exactly what I should have had as the 996t comes with a 3.8bar fuel pressure regulator as standard.
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
I checked my fuel pressure a couple of months ago and used a gauge that looked exactly like the one in your pic, the brass connector on the end of the rubber pipe (connected to the gauge) screwed straight on, no other adaptors were needed.
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.
15 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.
1 acknowledgements have no verified action link; they do not establish a repair result.
Outcome without a verified action link
I also put another 10 litres in afterwards with no change in symptoms.
Hi all, my 2002 996T tip had a weird fault yesterday - I was accelerating out of a corner and then lost all engine power and throttle responsiveness over about 5 seconds - the gear box automatically changed down from third and the throttle was immediately non responsive.
I first thought it was a gearbox fault, as it felt like the car had shifted into neutral and the speed just gradually decreased until the revs died right down and the engine stalled as we came to a standstill, but I don't think it was, I noticed the car shifting down at least one gear, possibly two. No flashing lights on the gear selector indicator either.
I think it was just the engine becoming unresponsive and gradually dying to a stall, almost as if it ran out of fuel, but there's plenty of fuel in the tank - half a tank on the gauge and I only filled it up about 90 miles previously, so I think the gauge is accurate (4WD 996s often misread at half a tank after a battery cut off due to the saddle tank). I also put another 10 litres in afterwards with no change in symptoms.
No warning lights or codes, no smoke, no bangs or unusual noises. No leaks. Temperatures, voltage and oil pressure were normal immediately before the issue.
Once at a standstill, I tried to restart, with a strong starter motor and cranking, but no firing, even after adding the 10L of fuel.
The car has an aftermarket fuel pump (Walbro, so a quality pump with no history of failing), and the crimped electrical connection from that to the oem two power wires had previously become detached, so I immediately suspected a reoccurence of that, but when I pulled off one of the fuel lines from the top of the fuel sender, fuel immediately started to pour out (even with ignition off), so it seems that the pump is providing at least some fuel pressure.
After being sat for 30 minutes or so I tried to restart and again, strong cranking, and the engine stumbled to fire, but not on all cylinders and only very weakly for a second or two. Tried again later and no firing at all, despite a strong turning over from the starter motor.
Just a weird one all around really and I'm struggling to figure out where to start basic fault finding:
- would the above happen if there was no power to the spark plugs (fuse issue)?
- could it still be a fuel issue, perhaps a cracked fuel pipe within the fuel tank (common issue)?
- could it be the fuel pump fuse or relay?
- a blocked fuel filter (seems unlikely to stop all running)?
Any pointers gratefully received!
Thanks - I've tried this before and failed miserably - couldn't get any of the fittings from a relatively cheap kit off Amazon to fit on that port, is it a specific port/adapter I need?
Highly unlikely to be the fuel pump I suspect - it's a Walbro that's 4 years old and has fewer than 6k miles on it. They're extremely reliable.
Much more likely to be a connection somewhere - either fuel pipe crack in tank or electrical I suspect.
I checked my fuel pressure a couple of months ago and used a gauge that looked exactly like the one in your pic, the brass connector on the end of the rubber pipe (connected to the gauge) screwed straight on, no other adaptors were needed.
With the engine off but the fuel pump running via durametric I had 3.8 bar which is exactly what I should have had as the 996t comes with a 3.8bar fuel pressure regulator as standard. If your car has a 5 bar regulator then you should have 5bar when checked as above!
You could also try the fuel delivery and return. My old 996 cut out and failed to start.... cause was water dillution in the fuel from a dodgy fuel station. We were chasing it for weeks.
Just a quick query - is the fuel pressure test point pre or post fuel filter?
If it's post and the pressure is ok, that would rule out the fuel filter.
It's after the filter on the line which connects to the passenger side fuel rail
Ps I've never seen a fuel filter be the cause of a breakdown on a modern fuel injected car
Just though seeing as you've got a durametric you can use it to manually turn the fuel pump on using the drive links.
If you just turn the ignition on it's not easy to hear the fuel pump due to all the other motors which make noises as they go through their start up routines, also it only primes the pump the first time you turn the ignition on. Turning the ignition on and off afterwards doesn't run the pump.
If you turn the ignition on then wait for all the noises to subside, then turn the pump on via durametric you can hear it start and stop especially from the engine bay by the fuel filter if it's working
