Boost Guage Has Failed!

[james_pa28]

Typical, as soon as I put my car up for sale, something goes wrong

Just noticed this morning on the way to work that the needle is slapped way back against -7 on the gauge.

It's a standard fit pillar mounted S15 gauge which I believe is controlled electrically!?!? Mainly because it doesn't sit at 0 when the engine is off! Which I always thought was to do with vacuum on a mechanical gauge.

Anyone got any ideas what to check or look for, heard of the problem before maybe?

Cheers!

James

 

[Nicely]

Stock boost gauge reading low? (post 8 onwards)

 

[james_pa28]

Thanks alot mate, I'll have a good read through at lunchtime :thumbs:

 

[JEZ 8553]

Does anyone know the size of the piping (length and diameter) i would need to replace the stock item ?

I would check myself but my car is probably somewhere in the Indian Ocean at the moment

 

[Nicely]

I just used some standard 5mm boost hose. You will need to keep some of the old hose on the boost sensor nipple to make up the difference in diameter.

 

[james_pa28]

Well bizarrely the gauge starting working again on the way home! It's holding boost and running perfectly through the gears!

So I think great, problem solved,

I'm home and now it's stopped working again! Obviously electrical not mechanical fault!!!

I can only guess it might be a contact somewhere, anyone know where is useful for check, or what fuses my be in the circuit with the gauge! I'm not very mechanically minded so I apologies for the stupid q's!

Cheers!

 

[JEZ 8553]

I just used some standard 5mm boost hose. You will need to keep some of the old hose on the boost sensor nipple to make up the difference in diameter.

Cheers :thumbs:

 

[james_pa28]

Ok made an interesting discovery this morning... not that it really helps though!

The gauge is always working when I start the car but switches off at any time! If you turn the ignition off and on, it will come back on until it wants to switch off again.

I noticed today on the way to work, I'm pulling away from the trafic lights nice and sedately, glanced over and the needle suddenly sweeped around to max boost then back round to negative and stopped at -7!!!

Very strange! I'm glad I don't have a german or Italian car if an electrical this minor is so confusing!

 

[meddler]

I would be looking for a loose electrical connection.

 

[james_pa28]

I've had a fiddle about with all the plugs, I wonder if all needs a quick going over with a wire brush or something. Think I could do with checking behind the actual gauge if I get a chance on Saturday!

 

[Nicely]

There's a connector behind the A pillar pod.

 

[james_pa28]

There's a connector behind the A pillar pod.

Thanks! :thumbs:

You're head is like a huge Nissan Silvia reference library - you litterally do know everything don't you?

 

[Nicely]

:no: There's lots of stuff I don't know. But you will usually get the answer off someone else I just remember a lot of other people's findings

 

[meddler]

You're head is like a huge Nissan Silvia reference library - you litterally do know everything don't you?

lol... yep he does know way too much.

 

[sushiming]

yup nicely doe know a lot but then u can learn a lot here from other ppls finding nicely has learnt off me aswell haha as well i ive learnt twice as much from him tho lol

but yeh nicely is :thumbs: