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Home > Help Needed / General Tech Chat > Fuel in vac pipes.

1293 sprite

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Melton Mowbray

2nd Feb, 2014 at 09:54:48pm

Hi

My boost gauge stopped working the other day, vac pipe still connected up, but noticed under the dash there was fuel sitting in the pipe. Started it up, and the fuel was bubbling around in the pipe. I'm guessing that it's knackered the gauge. Before I buy a new gauge and have the same thing happen, is there something I can fit in the vac pipe to stop the fuel? I seem to remember seeing something about it before, but couldn't find anything. Also is it normal to get fuel in the vac pipes? Don't want the megajolt to go the same way.

Thanks, James

On 25th Sep, 2009 mini13 said:
cool, i'll pop over with my tool and some lube, lol

1293 88.8hp 82.2ftlb

17.3 1/4 @ 78 mph

Naturally Aspirated (for now)

Carlzilla

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Quarry Bonk

2nd Feb, 2014 at 10:01:14pm

Plumb the gauge further away from the engine if possible, preferably before the carb. Tee off the plenum if possible.

On 26th Jan, 2012 Tom Fenton said:
ring problems are down to wear or abuse but although annoying it isn't a show stopper

On 5th Aug, 2014 madmk1 said:
Shit the bed! I had snapped the end of my shaft off!!

17.213 @ 71mph, 64bhp n/a (Old Engine)

stevieturbo

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Northern Ireland

2nd Feb, 2014 at 10:52:45pm

If it's a mechanical boost gauge, internals will likely be brass.

There is no reason fuel should affect it's operation.

9.85 @ 145mph
202mph standing mile
speed didn't kill me, but taxation probably will


theoneeyedlizard

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The Boom Boom speaker Police!

Essex

2nd Feb, 2014 at 10:54:06pm

You should be reading boost pressure at the manifold as this is what the engine 'sees'.

In the 13's at last!.. Just

D4VE

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lowestoft suffolk

2nd Feb, 2014 at 10:54:50pm

Ive had fuel too but in the vacuum to the dump valve.. ive now faced it down so not to perish the diaphragm, but now youve worried me if it can knacker guage and megajolt???

On 24th Oct, 2015 jonny f said:
Nothing gets past Dave lol

NOTHING GETS PAST ME!! *tongue*

1/4 mile 14.7 @ 96mph 12psi boost
Showdown class A 2nd place 18.6 @ 69mph


1293 sprite

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Melton Mowbray

2nd Feb, 2014 at 11:32:05pm

It's mechanical, but a stepper motor electronic jobby I think. Only a cheap one though, about £30.

My main concern is the megajolt, don't want to fry the map sensor inside.

I'm sure I read about a one way valve type thing to stop the fuel, just can't find anything on it now.

On 25th Sep, 2009 mini13 said:
cool, i'll pop over with my tool and some lube, lol

1293 88.8hp 82.2ftlb

17.3 1/4 @ 78 mph

Naturally Aspirated (for now)

Sprocket

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Preston On The Brook

2nd Feb, 2014 at 11:36:28pm

Search Minispares for 'fuel trap'

On 26th Oct, 2004 TurboDave16v said:
 Is it A-Series only? I think it should be...
So when some joey comes on here about how his 16v turbo vauxhall is great compared to ours, he can be given the 'bird'...


On 26th Oct, 2004 Tom Fenton said:
Yep I agree with TD........

1293 sprite

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Melton Mowbray

3rd Feb, 2014 at 12:08:21am

Awesome thanks, didn't realise it was actually a mini specific part!

On 25th Sep, 2009 mini13 said:
cool, i'll pop over with my tool and some lube, lol

1293 88.8hp 82.2ftlb

17.3 1/4 @ 78 mph

Naturally Aspirated (for now)

stevieturbo

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Northern Ireland

3rd Feb, 2014 at 11:02:17am




On 2nd Feb, 2014 1293 sprite said:
It's mechanical, but a stepper motor electronic jobby I think. Only a cheap one though, about £30.

My main concern is the megajolt, don't want to fry the map sensor inside.

I'm sure I read about a one way valve type thing to stop the fuel, just can't find anything on it now.


Map sensors should always be mounted higher than any fuel, and always with the hose inlet pointing down. That way no fuel should ever reach the sensor.

9.85 @ 145mph
202mph standing mile
speed didn't kill me, but taxation probably will

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