My Bonne just started acting funny.
Yesterday I went to step on it alittle to pass some twit as soon as the boost gauge hit 0 psi and the SC was about to kick in the car bogged and acted like it wanted to stall.
So I did some reading on here and the old forum and did the bypass trick with the BCA/BCS and the problem is solved temporarily.
So I have some questions regarding the BCS and BCA.
When you do the bypass is it normal for the boost gauge not to go above 0 psi ?
How do I know if the problem is the BCS or the BCA ?
What causes the BCS to fail ?
What position is the BCA arm supposed to be in at idle, extended or in ?
When is the boost supposed to show 100% on the scan tool ?
Any help would be great,
Thanks in Advance,
Dutch
Troubleshooting BCS/BCA on my 92
-
Dutch2005
- SE Member
- Posts: 20
- Joined: Sat Jun 28, 2008 1:18 pm
- Year and Trim: 1995 Bonneville SSEi
1992 Bonneville SSEi - RIP - Location: Toronto, Canada
Re: Troubleshooting BCS/BCA on my 92
Bump...
A little help please
Thanks,
Dutch
A little help please
Thanks,
Dutch
-
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: Troubleshooting BCS/BCA on my 92
When you do the bypass is it normal for the boost gauge not to go above 0 psi ?
No.
How do I know if the problem is the BCS or the BCA ?
If you pull the bottom tube off the BCA and boost returns to normal, it's ths BSC or the PCM telling it to dump boost. Scan it. If boost doesn't come back, look for vacuum leaks in or leading up to the BCA.
What causes the BCS to fail ?
Who knows.
What position is the BCA arm supposed to be in at idle, extended or in ?
Pulled in.
When is the boost supposed to show 100% on the scan tool ?
Most of the time. That means it isn't trying to dump whatever is there. The car has no way to actually know how much boost is present. You may have a MAP sensor, but it is solely for the gauge on the dash. If the PCM is trying to dump, it'll say 0%.
No.
How do I know if the problem is the BCS or the BCA ?
If you pull the bottom tube off the BCA and boost returns to normal, it's ths BSC or the PCM telling it to dump boost. Scan it. If boost doesn't come back, look for vacuum leaks in or leading up to the BCA.
What causes the BCS to fail ?
Who knows.
What position is the BCA arm supposed to be in at idle, extended or in ?
Pulled in.
When is the boost supposed to show 100% on the scan tool ?
Most of the time. That means it isn't trying to dump whatever is there. The car has no way to actually know how much boost is present. You may have a MAP sensor, but it is solely for the gauge on the dash. If the PCM is trying to dump, it'll say 0%.
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