Weird Boost Gauge Behavior
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kjpowers
- LE Member
- Posts: 1
- Joined: Thu Aug 22, 2019 8:39 am
- Year and Trim: 2002 Pontiac Bonneville SSEI
Weird Boost Gauge Behavior
New to the group here. I have a 2002 Bonneville SSEI. Just noticed when rolling downhill yesterday that my boost gauge shot up to 0psi. I had my foot on the brake, not the gas. I parked and let it idle when I got home and the boost gauge was jumping around erratically. I would normally think it's just the stepper motor in the dash, but you could hear a change in the way the car ran. Then, it shut off on its own. Anyone had something similar? If so, how was it fixed? Thanks!
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J Wikoff
- Administrator
- Posts: 17080
- Joined: Mon May 19, 2008 7:01 pm
- Year and Trim: 1992 SSE
2009 G8 GT - Location: Central Illinois
- Contact:
Re: Weird Boost Gauge Behavior
Could be a vacuum leak in the boost control actuator or lines leading to it. Or the manifold air pressure sensor is going bad, or... the wiring to it.
WHITE WHINE - 1992 SSE Supercharged 236.26 ci (.040 Over) 15.090 at 90.2 MPH on old engine w/ slipping trans & melted O2 sensor - Gen 3 M62 and matching TB, Gen 2 Pully, Zillamotorsports Ported LIM, YT 1.72 Roller Rockers, SII FPR & Injectors, Hypertech Thermomaster chip w/ 160 Thermo, TransGo Shift Kit, Infinity/Pioneer Speakers & a 10" Alpine Type R Sub, all the watts, 140 amp Alternator, Ricepipe CAI w/ heatshield, Pilot Angel Eye Foglights, Clear Corners, '02 17" Chrome Bent 5's, Magnaflow F-Body Muffler and Hi-flo Cat, Ceramic Coated Ported Exhaust Manifolds, Fan Override, Monroe Reflex struts, red calipers
2009 G8 GT - Sport Red Metallic, loaded, SOLO Axlebacks, Rotofab Intake, Tuned, autodim mirror, removed intake manifold cover, HSV GTS triple gauge pod, two tone red-hot shifter and HSV SuperSport steering wheel, GXP rear sway bar and diffuser, 3.45 diff and various Camaro suspension bits, LED Taillights