Idling - Whats your boost gauge read.

[EHeye]

Well I checked with my local DSM club and most everyone reads at about 20 into vac or maybe even 15 into vac.

My question is, im at 3 into vac at 750rpm idle.

Anyone know which is right?

 

[LucidEclipse]

I'm at 19-20

 

[jb talons]

Mine reads like this (at least it did while it was running.

15 in vac at idle

20 in vac on decelleration

 

[nhsean69]

Mine reads the same as JB Talons.

 

[DinK]

Are these vac numbers in PSI or some other unit?

You can only get between 14 and 15 psi of vacuum.

 

[EHeye]

it is inHg (inches of Mercury)

so do u think I have a problem if it is at 3 inHg when @ idle. If so has anyone ran into this problem before?

 

[blackifre22]

i get about 22-24

 

[ChicagoGSX]

17, and yes there is something wrong if its at 3.

 

[kagegod]

the stock numbers for the engine are 17-22 vacuum at idle is healthy. 13-16 vacuum at idle witha steady needle means that you have: a misfiring engine, a manifold leak, or a valve issue. I run about 15 steady at idle and I have a misfire in my engine (cause my missing link still hasn't come!!)

 

[bosted95eclipse]

mine reads 15-17 idle
20-22 when i let off the gas

 

[K Dan]

19

 

[L2RTSiAWD]

If you only have 3 psi vacuum at idle you have serios boost leak issues

 

[echo]

i get 19-20 at idle and 22-23 when decelerating.

 

[90GSX]

Zero... it's a 0-35psi gauge. Ha!

Seriously though, according to a vac gauge my GSX has about 14 inHg at idle (1300 rpm); However, this lower than usual number can most likely be attributed to the 272's and the high idle.

 

[Megaman]

Originally posted by echo
i get 19-20 at idle and 22-23 when decelerating.

same here

 

[candela]

Yes with it only at 3 you have to have either a boost leak, or something else telling the motor there is a load on it. Is this with ac on, clutch in...etc or did you see this when you have NO load on the motor and in neutral? Do you have any CEL's going on? Fouling plugs/misfire as someone said above...

 

[Malefic DSM]

Right now I have 0 vac. But I havnt gotten my GSX yet. tehehe

 

[Defiant]

Originally posted by EHeye
it is inHg (inches of Mercury)

so do u think I have a problem if it is at 3 inHg when @ idle. If so has anyone ran into this problem before?

Well, you need to convert to psi, but I think you've hooked into the wrong port.
Is it running okay? Are you just driving yourself nuts over a gauge you've just installed? Now you see why the factory gauge is fake. It's not because they couldn't put a real one in there.

 

[turbolaserAWDrs]

mine is 24-26...is that bad?

 

[EHeye]

I may have taped into the wrong line, I have had it runnign like this for a long time. When I am driving everything seems to be normal though, deaccel i hit 20 into vac. Im not sure what it could be, i will try different lines tonight and see what readings I get. Kinda making me worried now.

 

[c0degsx]

im 22-26..........and all vac-boost guages read vaccum in hg and boost in PSI.......homie

 

[RedTurboEclipse]

on start up and warming up.. at idle: anywhere from -15--18 hg in vac..

after that and driving the car and when in idle.. around -19--20

like mentioned.. if ur only getting -3.. u got some issues.. prob leaks or something.. at least hope thats the only problem

 

[EHeye]

which is really weird, cause it is fine when I drive around, only at idle.

 

[Defiant]

Originally posted by EHeye
I may have taped into the wrong line, I have had it runnign like this for a long time. When I am driving everything seems to be normal though, deaccel i hit 20 into vac. Im not sure what it could be, i will try different lines tonight and see what readings I get. Kinda making me worried now.

Jesus. Do it right, then come back with the next episode of your car soap opera. Here:

http://www.myzero.com/gauges/boost.html

 

[TurBoGs-T]

i get 19-20 at idle