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[Darth Loo-knee]

Where is the hissing coming from?

I'd be guessing something to do with the sai.

Doesn't make a hissing noise though, well don't think so.... more of a humming or buzzing :-?

[Neil (Cardiff)]

Sorry SAI? I haven't really thought anything of it so I don't think its anything too sinister. The engine light is showing code 73 MAF sensor (which is basically the automatic choke?) so I'm thinking the whole car just needs a bit of a clean up inside.

[CaptainZok]

Where is the hissing coming from?

I'd be guessing something to do with the sai.

Doesn't make a hissing noise though, well don't think so.... more of a humming or buzzing :-?

Hmmm better get the op to check under the bonnet for snakes then.

[Neil (Cardiff)]

[/quote]
Hmmm better get the op to check under the bonnet for snakes then. [/quote]

See you think its funny but thats proper what it sounds like!  

[CaptainZok]

Where is the hissing coming from?

I'd be guessing something to do with the sai.

Doesn't make a hissing noise though, well don't think so.... more of a humming or buzzing :-?

Sai solenoid is opened by engine vacuum for the warm up period so I was thinking a leak on the valve itself.

[Entwood]

Yeah thats what I've been thinking. The car only cost £250 - I'll have spent that in petrol by the end of the month 

Yeah I've seen 7 a lot I think it's just a big inefficient engine with a slow auto box to be honest. Anyone know of any cheap n quick fixes to maybe improve things a little?

Without being rude .. if you are seeing "7 a lot" then your right foot is being pretty heavy !!! and THAT is the major cause of low mpg !!

It's a big car, with lots of inertia, and trying to "boy race" will use loads of energy (fuel) ... a more sedate, gentler driving style would probably give far better fuel economy.

A blast every so often does no harm .. and seeing off the odd chav is good fun .... but in general ..... 

HTH

[Andy H]

Where is the hissing coming from?

I'd be guessing something to do with the sai.

Doesn't make a hissing noise though, well don't think so.... more of a humming or buzzing :-?

SAI - big fan/air pump under nearside front bumper blows additional air into the exhaust manifolds for about 30 seconds after the engine starts to give an initial bit of heat in the catalytic converters. There are some fairly soft rubber hoses connecting the air pump to stainless steel pipes on the manifolds. They can split and make a loud hissing noise. I think they also hiss if the hose clips are missing.

[Neil (Cardiff)]

Ah thanks Andy that sounds like that could be about right!  I'll have a look next time I get a spare half hour. Have a 9month old daughter so cars have come second lately