Prolly a stupid question but is it normal for my map to not read any vacuum? at idle my car shows 4psi and the other shocker is i only have a 3.4 setup and at wot it reads a max of almost 21psi
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05-02-2011
Prolly a stupid question but is it normal for my map to not read any vacuum? at idle my car shows 4psi and the other shocker is i only have a 3.4 setup and at wot it reads a max of almost 21psi
05-02-2011
ha. your needle's off
05-02-2011
its actually what my hp tuners is reading it with engine off it reads zero so im not sure if the sensor is bad or what
05-02-2011
shoot, reading fail. Maybe you're just actually at 21 psi... LOL
05-02-2011
Or maybe you have clogged exhaust portions and a vacuum leak...i.e. bad converter/rotted vac lines?
05-02-2011
not sure for exhaust i have ssac headers with no cat or resonator the only thing inline is some magnaflow muffs, and even so if i had a vacuum leak im not sure how i could get 4psi at idle lol
but the thing is could this be off in hptuners because my vehicle boost guage which i know is by far not accurate doesnt show any bars while sitting there
edit: oh and i just ported my supercharger and all the vac lines looked good
05-02-2011
Where is the gauge tapped in at? If you didn't tap it in under the MAP...there is your issue.
05-02-2011
sorry i prolly wasnt clear enough i dont have a boost guage im simply just ready the cars map with hptuners
05-02-2011
Well that doesn't sound right...any check engine lights?
Also...if your on a stock pulley...with headers...4 psi doesn't seem out of the question but at idle...something is a miss.
I'd still be willing to bet you have a vac leak somewhere or your BBV is toast since you said you just ported the blower.
05-02-2011
ill look everything over again, i know the bbv works as ive seen it actuating while manually pullling the throttle cable under the hood. i dont have a stock pully i have a 3.4.
it runs fine and there is no codes i was just starting to scan and tune and noticed it idled around 4psi and wot im seeing like 21psi which im pretty sure isnt true on a 3.4 with headers and nothing but muffs
05-02-2011
What custom pid are you using to read boost? because hptuners reads the map value in kpa not psi.
05-02-2011
hp tuners can read it in both i just went to properties and changed it from kpa to psi if it read it in kpa it reads between 28-29kpa
sorry im still new at most this stuff i just have a little general knowledge
05-02-2011
Edit: Sorry guys i got it figured out i thought it showed zero when the car was off but actually it shows 14, so i guess my next question is does the map being off hurt anything?
Last edited by shawnschuldt; 05-02-2011 at 08:16 PM.
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