Thread: boost gauge not working

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  1. #1 boost gauge not working 
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    My boost gauge in the drivers info center on my 97 GTP doesnt seem to be working. As well, the previous owner seems to have a needle style boost gauge installed in the lower dash compartment that also doesnt work. Any ideas where I can start?
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  2. #2 Re: boost gauge not working 
    Moderator dsmuts's Avatar
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    Look for a broken vacuum line or other vacuum leak.
    98 GTP modded 1.9's, sd headers, 3.4", zzp 1.0 230K miles scrapped.
    04 Comp G zzp stb's, UMI ta's, Speedbuilt sways, bully flo heads, XP, zzp headers, fsic, thrasher shift kit, 60#, 2.6" corsa 2.5", Inferno hood
    01 gt z7 turbo tep trans zzp motor
    08 g8 gt cam exhaust 11.87@118
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  3. #3  
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    Find the vacuum line for the aftermarket boost gauge and check it. I would imagine the dic gets its boost reading from the map sensor. I'd start there.
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  4. #4 Re: boost gauge not working 
    SE Level Member JerzNick's Avatar
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    Most people use a T connector at the evap as it's closest to the firewall. Check for an unplugged or damaged vacuum line right around where I illustrated for you below.

    eng_evap.jpg
    Bored block, Eagle Crank, XP Cam, Ported Heads/LIM/Blower/TB, 3.0 Pulley, CAI, Headers, 42.5#, AL 104's, etc...
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  5. #5 Re: boost gauge not working 
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    Quote Originally Posted by JerzNick View Post
    Most people use a T connector at the evap as it's closest to the firewall. Check for an unplugged or damaged vacuum line right around where I illustrated for you below.

    eng_evap.jpg
    it was exactly as you said, the line was hanging from there, plugged it in, works perfectly now, thanks alot!
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  6. #6 Re: boost gauge not working 
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    Bored block, Eagle Crank, XP Cam, Ported Heads/LIM/Blower/TB, 3.0 Pulley, CAI, Headers, 42.5#, AL 104's, etc...
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