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Home > Beginners Tech > Running issues

flyingturd

286 Posts
Member #: 4008
Senior Member

near cardiff np12

A good few weeks back i took it out for a run after installing a fuel reg.
when you accelerate it pops/backfires as it boosts


theoneeyedlizard

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7259 Posts
Member #: 1268
The Boom Boom speaker Police!

Essex

If it's backfiring from the exhaust, it's isusly because it's too rich.

More info would be good.

What fuel regulator. Why did you change it? Was is like this before changing the regulator?

In the 13's at last!.. Just


flyingturd

286 Posts
Member #: 4008
Senior Member

near cardiff np12

Wasn't running a fuel reg before but was pushing out black smoke. I haven't driven it far since the restoration so im just guessing at what's wrong.


Rob Gavin

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6729 Posts
Member #: 618
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Glasgow

Have you set the regulator pressure?


flyingturd

286 Posts
Member #: 4008
Senior Member

near cardiff np12

yes at 2.5 psi 0.2 bar


Rob Gavin

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6729 Posts
Member #: 618
Post Whore

Glasgow

Pretty sure it needs to be about 4psi


flyingturd

286 Posts
Member #: 4008
Senior Member

near cardiff np12

ok ill have a look i just thought it was over fueling


wil_h

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9258 Posts
Member #: 123
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Betwix Harrogate and York

2.5psi should work fine. Remember the pis at idle is just the pressure above boost that the pump will maintain to keep fuel flowing into the float bowl.

Popping and banging is more likely an issue with a lean mixture. My guess is that the float bowl isn't being presurised.

Search 'T piece trick' on here and try that first.

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