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YOUR RESEARCH'81 SC Fuel Pump Check Valve - Page 1 - Porsche General - PistonHeads UK
Leading reported evidence
Run very badly as though
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Performed · outcome unconfirmed · Original poster
The car proved very difficult to start yesterday afternoon and when it finally did it ran very badly as though on only 4 cylinders.
'81 SC Fuel Pump Check Valve - Page 1 - Porsche General - PistonHeads UK
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Leading evidence: 'Run very badly as though' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Check metering head very carefully' (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.
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'81 SC Fuel Pump Check Valve - Page 1 - Porsche General - PistonHeads UK
Replace even if it's not the cause
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Suggestion · Original poster
I am having a problem with warm starting and everyone seems to think this is the usaul cause, and relativly cheap to change even if it's not the cause.
'81 SC Fuel Pump Check Valve - Page 1 - Porsche General - PistonHeads UK
Run regardless
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Suggestion
In particular that you can feel some resistance on the arm and sensor plate.If the plate has no resistance there is a strong chance that your piston is stuck or sticking in the metering head causing your injectors to run regardless.
'81 SC Fuel Pump Check Valve - Page 1 - Porsche General - PistonHeads UK
Use their e-mail section
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Suggestion
) and use their e-mail section to ask for a quote for that part number.
'81 SC Fuel Pump Check Valve - Page 1 - Porsche General - PistonHeads UK
Replace even if it's not the cause
No successful repair reported for this finding.
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Reported fixes
0
Unsuccessful attempts
1
Discussions
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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 · Original poster
I am having a problem with warm starting and everyone seems to think this is the usaul cause, and relativly cheap to change even if it's not the cause.
'81 SC Fuel Pump Check Valve - Page 1 - Porsche General - PistonHeads UK
Run regardless
No successful repair reported for this finding.
0
Reported fixes
0
Unsuccessful attempts
1
Discussions
Read evidence and context
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
In particular that you can feel some resistance on the arm and sensor plate.If the plate has no resistance there is a strong chance that your piston is stuck or sticking in the metering head causing your injectors to run regardless.
'81 SC Fuel Pump Check Valve - Page 1 - Porsche General - PistonHeads UK
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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.
18 eligible posts · 0 unverified posts · 1 discussions match the subject in their title or opening post.
PistonHeads: 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: 20261026T220748Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources
Mornin' Danny,
I asked for a quote for my heater relay from auto car parts. They mailed me back the next day with a quote which I gather to be quite good given the estimates I had heard previously. Try them here (
www.eurocarparts.com
) and use their e-mail section to ask for a quote for that part number. Or just mail [email removed].
Dom
I had already tried Bert and Eurocarparts - no joy.
Bosch said that Euro should be able to supply, but...
Anyway I bit the bullet and phoned HR Owen, £11+vat!
Cheers
Danny
So what is the part that costs only £15, Danny?
Domster - The relay that I needed wasn't on the website, but they got back to me when I e-mailed them with the part no. I was only marginally happier than before as the price that they charge is £98 + VAT + posting. I think that I will try to get a second-hand / one from a scrapped car cheap.
Does anyone know anywhere that has any 3.2 Carreras lying around??
Dom
It's the one way valve that fits to the fuel pump to maintain fuel pressure when the engine isn't running.
www.pelicanparts.com/catalog/images/fuel_injection/new_images/fi_fuelsystem_2-1c34a.jpg
I am having a problem with warm starting and everyone seems to think this is the usaul cause, and relativly cheap to change even if it's not the cause.
Thanks for the list of parts suppliers - I spent ages last night trying to find them!
Cheers
Danny
Now that is funny.
He does always sound SO definite in his replies, doesn't he ?
Only joking 9M, at least someone here knows what they're talking about.
LOL, you know I don't know my squish from my squosh. 9M
is
the daddy!
I'll have to get you to explain what Hemi heads are one day, and whether a side-valve conversion is worth applying to my 3.6 RS engine
The way that most people tend to drive the poor RS, it seems like they are intent in converting them to side valve without even taking them to pieces.
Hemi is just short for hemispherical. Just in case you never seen one (and why would you?) all 911 heads are perfectly circular in cross section through the combustion chamber in order to fit stupidly large valves, which is why we have to make mad pistons with domes on top to fill in all the space and try to get the compression up. Engineers never have it easy you know, always something to worry about!
Back to the Check Valve. If you want to source one, more locally. The same check valve is fitted to the Mk1 golf GTI and probably a host of other K-jet cars.From memory I have had a leaky accumulator cause this as well (leaky as in diaphram).
oops I should of said similar check valve.And my car was a bit earlier so things may be slightly different!
>> Edited by lemon yella rs on Saturday 14th December 20:30
Thinks have got worse - much worse. The car proved very difficult to start yesterday afternoon and when it finally did it ran very badly as though on only 4 cylinders.
The oil level guage started to rise so it appears that neat fuel is finding it's way into the oil.
I am going to check for leaky injectors in the morning (even though they are new)
Danny
I am sure I won't be the only one to say this But... check your metering head very carefully. In particular that you can feel some resistance on the arm and sensor plate.If the plate has no resistance there is a strong chance that your piston is stuck or sticking in the metering head causing your injectors to run regardless. I am sure someone will put this in more understandable english!
