Losing Boost

[JunglBoi]

hey guys dunno if any of u guys have ever had this problem

but suddenly 2day my car wont get boost above -5

i haven't been using the car

but have removed my fmic and installed a stock smic

just wondering where could i have possibly gone wrong or what else could have happened

grrr

want boost back

[5hu7o]

hasnt hap to me but try "General Maintenance" section.

[bish33]

i would check all ur intercooler piping make sure ther are no leaks

[PM-R33]

Does the car idle fine? Or does it hunt around a bit? Get some one to rev the car in neutral and stick your head near the SMIC and listen if you can hear a leak. If the intercooler is the only thing you have touched, then your problem lies there.

[JunglBoi]

oh ok

so thats good

i was kinda thinking for some reason i coulda poped my turbo

but thats unlikely right?

i do rev it up to about 4.5k when i turn it on sumtimes just to check it was working when i installed the intercooler

but didnt pay attention to the boost at that time

but thats unlikely to have cause it right?

so more than likely its the piping not completely sealed?

any tips on sealing the pipes really good?

[Piggaz]

No reason why a hose clamp wont do the job for you

[MBS206]

If you're only seeing -5 on the stock boost guage, you aren't even getting out of vacuum... Actually, you're quite deep in it.

I'd pull the SMIC off and check for rags etc.

[JunglBoi]

wat u mean rags?

is it likely at all that the smic is damaged?

by damamged i mena have a hole

Edited September 21, 2008 by JunglBoi

[MBS206]

wat u mean rags?

is it likely at all that the smic is damaged?

by damamged i mena have a hole

If you had a hole, like a decent one in the SMIC, you'd have more dramas then no boost. It would be like trying to run with a cooler pipe off...

Rags, as in CLOTH...

Pull it all off, check pipes for blockages etc.

If you're only seeing MINUS 5, on the boost gauge, you're not even hitting atmospheric pressure, IE, you can't flow enough air through the pipes to even satisfy the engine if it were normally aspirated. You don't have a hole in the pipes, you have a blockage somewhere.

Either that, or have you taken the car for a drive and tried to boost it?

[JunglBoi]

nah the car has no rego atm

so cant take it for a drive but when i rev it up a lil...it goes from minus seven up a bit then drops down a bit agen

and stays at that point

so its likely i have a blockage or leakage sumwhere?

[wasnt me]

well there is your problem lol

the car needs to be under load to create boost.....

take it for a drive....

[JunglBoi]

just reving it normally can bring up boost

or am i wrong and imagining things?

[PM-R33]

just reving it normally can bring up boost

or am i wrong and imagining things?

On the stock turbo i think you can bring it onto a little bit of boost, 1-2psi, but most cars with a larger turbo you can't bring it onto boost without putting it under load.

[RicsR33]

well there is your problem lol

the car needs to be under load to create boost.....

take it for a drive....

Agree'd but you would still be able to hit 0 and should be eaisly able to pass -5... check for obstructions.

[MBS206]

just reving it normally can bring up boost

or am i wrong and imagining things?

Depends how hard you're prepared to rev it and for how long to make boost...

Take it for a drive, you're most likely imagining things, and nothing is wrong.

[SLY-25T]

possibly leak in hose from plenum to stock boost gauge box? might have boost but just isnt reading properly? not sure if this would apply as it is in the vacuum side of the gauge?

[(B1) MR_fanny]

i recon its cause your free reving it too. needs to be under load.

[JunglBoi]

u guys were right

i needed to put it onto the road for it to work

well we all learnt sumthin new

lols