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Jag7799
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Installed boost guage but its not working properly.. HELP Mon, 07 June 2004 08:25 Go to next message
installed boost guage with a T peice off this line..
vacuum works fine...
when im on boost it shows me as being on 0 psi(so making no positive boost)..
as well as whenever i rev on 0 psi.
I dont understand why vacuum works but boost doesent?


http://members.optushome.com.au/jag7799/car/boost.jpg


Any help please?

Thanks

[Updated on: Mon, 07 June 2004 08:33]

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boris
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Re: Installed boost controller but its not working properly.. HELP Mon, 07 June 2004 08:28 Go to previous messageGo to next message
Boost Gauge... he means boost gauge! Rolling Eyes
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Jag7799
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Re: Installed boost controller but its not working properly.. HELP Mon, 07 June 2004 08:28 Go to previous messageGo to next message
i swear i meant to hit edit, not reply

[Updated on: Mon, 07 June 2004 08:30]

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Cyber-punk
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Re: Installed boost controller but its not working properly.. HELP Mon, 07 June 2004 08:34 Go to previous messageGo to next message
i've never ever played with a boost gauge
but perhaps this might help with some trouble shooting...
try unplugging the gauge line from the t-peice
rev the engine and feel for any "air" comming from the t-peice
if you dont feel anything then perhaps the gauge is fubar?
i've seen this on refrigeration gauges, shows a reading when in vacuum(never overly accurate but it shows a vacuum) but no positive pressure
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Jag7799
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Re: Installed boost guage but its not working properly.. HELP Mon, 07 June 2004 09:01 Go to previous messageGo to next message
when i said "on boost", yes i meant driving with load on the engine Rolling Eyes
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BlackSupra
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Re: Installed boost guage but its not working properly.. HELP Mon, 07 June 2004 09:03 Go to previous messageGo to next message
Do you know where the other end of the vacuum line runs to. You may have tapped into a vaccum line that doesn't see boost at all.

E.g if that was for a VSV valve of some description.

[Updated on: Mon, 07 June 2004 09:04]

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Jag7799
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Re: Installed boost guage but its not working properly.. HELP Mon, 07 June 2004 09:19 Go to previous messageGo to next message
i think it may have something to do with air con system?
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BlackSupra
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Re: Installed boost guage but its not working properly.. HELP Mon, 07 June 2004 09:20 Go to previous messageGo to next message
haha then its probably the VSV valve.......it bleeds air until the heater is turned on, then its used for the climate control.


Thats my guess anyway....

If thats the case, time to move the T piece
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Cyber-punk
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Re: Installed boost guage but its not working properly.. HELP Mon, 07 June 2004 09:40 Go to previous messageGo to next message
deleted due to stupid post Razz

[Updated on: Mon, 07 June 2004 09:53]

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BlackSupra
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Re: Installed boost guage but its not working properly.. HELP Mon, 07 June 2004 09:48 Go to previous messageGo to next message
2 posts up.
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Jag7799
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Re: Installed boost guage but its not working properly.. HELP Mon, 07 June 2004 10:34 Go to previous messageGo to next message
i tried it on 2 more
http://members.optushome.com.au/jag7799/car/annoyed.jpg
that one that leads where ive circled.. and the one thats just below that on manifold.. again vac works... no boost
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Cyber-punk
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Re: Installed boost guage but its not working properly.. HELP Mon, 07 June 2004 10:45 Go to previous messageGo to next message
i just pulled a memory from somewhere
not sure how accurate it is
but shouldnt you the vacuum line that runs from the intake manifold to the fuel pressure regulator?
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Jag7799
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Re: Installed boost guage but its not working properly.. HELP Mon, 07 June 2004 11:08 Go to previous messageGo to next message
jsut cut the little hose up near the engine dip stick and put it there... looked promising with it finally going into positive boost for like a millisecond when i started the car(just flickered).. but again.. same shit
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sideshow
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Re: Installed boost guage but its not working properly.. HELP Mon, 07 June 2004 11:45 Go to previous messageGo to next message
i always find that runnin the black vac hose then sliding the white plastic pipe inside the hose is nooo goood

they leak
make sure u have a veryyyyy good seal where the white pipe goes into the black vacuum tubing

another thing is u really should not t piece the vac line into the map sensor hose

im not tooo sure but the second time u fitted the vac hose
t piece looks like it might be map sensor

i might be wrong

just double check it

u really dont want any interuptions on the map sensor hose

just a thought
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Jag7799
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Re: Installed boost guage but its not working properly.. HELP Mon, 07 June 2004 14:05 Go to previous messageGo to next message
im getting really sick of this.. i dunno what its doing.. but its not working at all
vacuum is fine..... but still showing no boost
if i blow into the line it rises to about 1 psi..
so it should be working correctly
seems to be sealing very well..
ive got it on the one next to the engine oil dipstick in 1st pic now
if i am to take the T piece out i will have to buy a new hose and put it on

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Spanktown
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Re: Installed boost guage but its not working properly.. HELP Mon, 07 June 2004 14:32 Go to previous messageGo to next message
you just T'd into the wrong vac line thats all... work out which is the right one and you will be fine.
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Jag7799
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Re: Installed boost guage but its not working properly.. HELP Mon, 07 June 2004 14:37 Go to previous messageGo to next message
Spanktown wrote on Tue, 08 June 2004 00:32

you just T'd into the wrong vac line thats all... work out which is the right one and you will be fine.

ive tried 4 off the plenum.......
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Spanktown
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Re: Installed boost guage but its not working properly.. HELP Mon, 07 June 2004 14:49 Go to previous messageGo to next message
sorry mate, i cant help you there i dont own a 1jz... try online diagrams? sure you have... sorry
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oldcorollas
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Re: Installed boost guage but its not working properly.. HELP Mon, 07 June 2004 15:00 Go to previous messageGo to next message
sheesh,

you really wanna be sure? drill and tap a hole in the plenum

and take heed of the comment on vacuum tubing over those white T pieces

THEY ARE NOT DESIGNED FOR PRESSURE.

you are most likely loosing pressure from the fittings..

would you run a hose from a turbo or intercooler WITHOUT a hose clamp? would you run a fuel line without a hose clamp?

nope.. and why?? cos they are under pressure Wink aaahhhh i hear you say Very Happy

clamp ALL the fittings for the vac/boost lines.. or they could easily blow off when under boost.

Cya, Stewart


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Allan
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Re: Installed boost guage but its not working properly.. HELP Tue, 08 June 2004 00:28 Go to previous messageGo to next message
your aware the engine only makes boost under load and not free reving?
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Jag7799
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Re: Installed boost guage but its not working properly.. HELP Tue, 08 June 2004 00:48 Go to previous messageGo to next message
Jag7799 wrote on Mon, 07 June 2004 19:01

when i said "on boost", yes i meant driving with load on the engine Rolling Eyes

was only in the 3rd post

[Updated on: Tue, 08 June 2004 00:49]

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Allan
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Re: Installed boost guage but its not working properly.. HELP Tue, 08 June 2004 01:07 Go to previous messageGo to next message
gauge could be faulty go get a big sirange from the chemest and test it
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Jag7799
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Re: Installed boost guage but its not working properly.. HELP Tue, 08 June 2004 01:22 Go to previous messageGo to next message
when i blow into gauge.. it goes up in pressure
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Allan
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Re: Installed boost guage but its not working properly.. HELP Tue, 08 June 2004 01:26 Go to previous messageGo to next message
Jag7799 wrote on Tue, 08 June 2004 11:22

when i blow into gauge.. it goes up in pressure



well clean all that out and try air make shure you can get more then 1-2psi to show

Allan
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Jag7799
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Re: Installed boost guage but its not working properly.. HELP Tue, 08 June 2004 05:56 Go to previous messageGo to next message
when i sit and rev it in neutral when it gets high in revs it creaps up to 1 psi.. but again while driving no boost...
ive put the white teflon tape on all the screw in bits
any ida's?
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Chris Davey
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Re: Installed boost guage but its not working properly.. HELP Tue, 08 June 2004 08:01 Go to previous messageGo to next message
Allan wrote on Tue, 08 June 2004 11:26

Jag7799 wrote on Tue, 08 June 2004 11:22

when i blow into gauge.. it goes up in pressure



well clean all that out and try air make shure you can get more then 1-2psi to show




Laughing Laughing Laughing Laughing Laughing

Also, don't rev it too hard in nuetral as I was told it puts major stress on the valves when there is no load.
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Mr DOHC
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Re: Installed boost guage but its not working properly.. HELP Tue, 08 June 2004 08:59 Go to previous messageGo to next message
wonder if your lines are full of shit
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Jag7799
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Re: Installed boost guage but its not working properly.. HELP Tue, 08 June 2004 11:27 Go to previous messageGo to next message
they all seem clean...
chris from sound off was around today and said i was definately on the right line...
theres no chance of leakage at all now...
car is making a shit load of power.. now its spinning the wheels in the dry at id say anything over 4000 rpm.. so its obviously making ample power
im gonna try jakes boost gauge in coming days...
im a bit more worried about the actual car atm.. as its not fully wired
but i still dont see where the problem is.. cause id say it was the gauge if it wasnt making positive pressure when i was blowing into it
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Jag7799
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Re: Installed boost guage but its not working properly.. HELP Wed, 09 June 2004 01:27 Go to previous messageGo to next message
well.. i now know why the fucking gauge wasnt working..
intercooler hose had blown off hence wasnt making boost
car was still damn fast without boost amazingly.. connected it a few times.. but anything over 5 psi would blow the piping back off again
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3S-GE_Man
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Re: Installed boost guage but its not working properly.. HELP Wed, 09 June 2004 12:40 Go to previous message
yeah on the bit were the shit boost gauge supilied white line and it goes into the toyota vac line place a zip tie round it or a couple and make it TIGHT, that what i've done on mine, works good

Nezza Cool
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