![]() | Home > LPG > 4.2 SC on LPG cranks for ages & high fuel pressure |
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tb10 Member Since: 17 Feb 2015 Location: Bromsgrove Posts: 333 ![]() ![]() ![]() |
Hi David,
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dhallworth Member Since: 10 Oct 2011 Location: Glasgow Posts: 3024 ![]() ![]() ![]() |
Thanks John,
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dhallworth Member Since: 10 Oct 2011 Location: Glasgow Posts: 3024 ![]() ![]() ![]() |
I’ve just been out for a quick run with it on LPG, if I stop it and restart it straight away it fires instantly. If I stop it, nip into a shop to pick something up and come back out, that’s when it turns over for what seems like ages but it probably around 5 seconds or so, maybe a little longer.
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tb10 Member Since: 17 Feb 2015 Location: Bromsgrove Posts: 333 ![]() ![]() ![]() |
Hi David,
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dhallworth Member Since: 10 Oct 2011 Location: Glasgow Posts: 3024 ![]() ![]() ![]() |
Thanks John,
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cass Member Since: 12 Oct 2011 Location: northumberland Posts: 711 ![]() ![]() ![]() |
Does it seem like it's "flooded" as we would have called it in the olden days?
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tb10 Member Since: 17 Feb 2015 Location: Bromsgrove Posts: 333 ![]() ![]() ![]() |
Cass,
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cass Member Since: 12 Oct 2011 Location: northumberland Posts: 711 ![]() ![]() ![]() |
John
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dhallworth Member Since: 10 Oct 2011 Location: Glasgow Posts: 3024 ![]() ![]() ![]() |
Well, there is a leak but it’s not an injector.
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dingg1 Member Since: 29 Jun 2013 Location: PORTUGAL Posts: 1312 ![]() ![]() |
You can most probably just change out the diaphragms, there's usually gasket kits available for most reducers, but if they're past their best probably just as easy to swap for new. |
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dhallworth Member Since: 10 Oct 2011 Location: Glasgow Posts: 3024 ![]() ![]() ![]() |
I’ve rebuilt a couple of them in the past and have never had very successful results. They never seem to be able to maintain pressure properly afterwards.
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dhallworth Member Since: 10 Oct 2011 Location: Glasgow Posts: 3024 ![]() ![]() ![]() |
Just to draw this to a close, replacing the reducers has indeed cured the prolonged cranking that I was experiencing on LPG.
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Gsxr1250dave Member Since: 20 Oct 2018 Location: London Posts: 865 ![]() ![]() |
Holy Old thread revivel batman, I'm having a similar issue but getting low fuel pressure reading when switching from lpg to petrol causing the engine to stall out and engine mil light. Plus long cranking when starting on petrol after its been run on lpg. I'm interested to know about the vacum pipe connection mentioned in this post as I'm sure mine is teed into the vacum pipe at the rear of the supercharger and wondering if this is causing my issue.
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Haylands Member Since: 04 Mar 2014 Location: East Yorkshire Posts: 8049 ![]() ![]() ![]() |
How old is the install,,? Pete
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