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Porsche Forum Australia

Help! Fuel leaking from intake manifold!!!

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6 captured repliesPartial discussion capture · Source accounts, not a confirmed diagnosis
THIS DISCUSSION / SOURCE-DERIVED OVERVIEW

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YOUR RESEARCHHelp! Fuel leaking from intake manifold!!!

Leading reported evidence

Fill manifold

Performed · outcome unconfirmed

No successful repair reported for this finding.

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Unsuccessful attempts
1
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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 performed work without a confirmed outcome
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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.

Performed · outcome unconfirmed · Original poster

but it is weird that it filled the manifold with fuel.

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Help! Fuel leaking from intake manifold!!!
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Leading evidence: 'Fill manifold' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Fill manifold' (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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1 matching discussions · 6 captured posts examined · 1 partial discussions

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Replace about 6 months ago

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

FPR replaced about 6 months ago.

Original post Read captured discussion
Help! Fuel leaking from intake manifold!!!
Frequently discussed actions (2)

These are separate views of the same evidence. Frequency alone does not establish a fix, and these counts must not be added together.

Fill manifold

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 · Original poster

but it is weird that it filled the manifold with fuel.

Original post Read captured discussion
Help! Fuel leaking from intake manifold!!!

Replace about 6 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 · Original poster

FPR replaced about 6 months ago.

Original post Read captured discussion
Help! Fuel leaking from intake manifold!!!
Coverage and how to read this overview

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.

6 eligible posts · 0 unverified posts · 1 discussions match the subject in their title or opening post.

  • Porsche Forum Australia: 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: 20261027T020439Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources

POST 1 / ORIGINAL POSTEROriginal post

I have a mystery to solve. I have been cranking the car while working on the electrics (Fuel pump running) and fuel has started pouring out of a cracked hose under the intake manifold in a stream. I am talking a couple of litres. Glad to find the vacuum leak I have been looking for (idle up hose for AC under the manifold) but how has that much fuel gotten into the manifold plenum? It should have been sucked into the cylinders even if they weren't firing. Any clues anyone?

POST 2Original post

Is this my neighbour? if not, you have exactly the same thing he just found on his 944 turbo. In his case, it was a return fuel hose I think.. he has ordered parts to fix.

POST 3 / ORIGINAL POSTEROriginal post

Thanks for replying. No I am in Buderim but it is weird that it filled the manifold with fuel. I don't even know how that is possible. I will have to think this one through.

POST 4Original post

Has the diaphragm in fuel pressure regulator failed allowing fuel into the hose to the intake manifold?

POST 5 / ORIGINAL POSTEROriginal post

Thanks for replying Peter. FPR replaced about 6 months ago. Even if it did fail, the way I see it, it should vent fuel into the return line. How does it get into the manifold? The only path to the intake manifold is though the injectors as far as I can tell. I am mystified.

POST 6Original post

I'm suggesting that fuel is possibly leaking from one side of the diaphragm to other where it is then sucked into the inlet manifold. Your car may also have a similarly configured fuel line damper that also should be checked. Suggest you check that the intake manifold port on both the regulator and the damper hold vacuum when you suck on the fitting. Sorry I can't be more specific as I'm not to familiar with 944's. The only other possibility is that one of your injectors is leaking.  If the regulator and damper check out, I would then pull the injectors out to check.

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