Vacuum system all messed up

[cbellsondsm]

some times when my car starts the boost guage is pinned at 0 for like 3 minutes, i can make boost no problem, it doesnt say anything until about 5 psi, snaps to 5 and climbs, then when i let off it jsut snaps back to 0, no vacuum at all for a little while, this happends only sometimes then its back to norma,, is it something i have to worry about?? anyone ever seen this before?

 

[STEVEn95tsi]

Check the vacuum line the boost gauge is hooked up to. Maybe for a leak or something... I had the same problem at one point.. I kept moving the boost gauge to different vacuum lines. When i finally tapped into the fpr line.. Then i got a vacuum reading...Its most likely where you have the boost gauge hooked up to.

 

[Spoolin18]

1.) what type of boost/vaccum gauge do you have? Mechanical/electronic?
2.) where are you tapped in for a boost/vaccum source?
3.) What brand is it?


Sometimes readings on a vaccum/boost gauge can give indications of potential problems, but other test must be done to confirm the diagnosis. You would also have to take in account any symptoms. Smoke, ETC.

 

[Grimis]

had the same problem and found out i had a hole in the nylon line. got a new line from autometter gauge works now. Check the above , and if its the gauge and autometter they get it fixed.