boost gauge concerns
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oldskoolie
- LE Member
- Posts: 2
- Joined: Thu Oct 28, 2021 8:04 am
- Year and Trim: 1994 SSEi
boost gauge concerns
My first boosted car. 94 SSEi. Boost gauge reads well below -5 lbs running down hiway under minimal load. Passing it might make it to 0. haven't seen it half way between 0 and 5 showering down on it. Where should I start? Appreciate any insight.
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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: boost gauge concerns
Hi. It should get up to around 7 or 8 when you floor the pedal. You could have a vacuum leak to the little black cylinder (boost control actuator) that opens the wastegate or a bad boost control solenoid, the little black box a couple inches away.
You can start by taking the vacuum line off the bottom port of the actuator that runs to the solenoid and see if the boost goes up higher. If it does, the solenoid is probably bad.
You can start by taking the vacuum line off the bottom port of the actuator that runs to the solenoid and see if the boost goes up higher. If it does, the solenoid is probably bad.
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
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oldskoolie
- LE Member
- Posts: 2
- Joined: Thu Oct 28, 2021 8:04 am
- Year and Trim: 1994 SSEi
Re: boost gauge concerns
Found vacuum leaks at 2 places. No it won't start. Get back in that in a few days. Thanks for response. I found 2 f/pumps, ign. module, cam sesor and crank sensor in trunk of this car. It intermittently dies, but always fires right back up. Well this time a loud hum came from trunk area and now it won't start. Will check power to pump tomorrow.