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03-28-2009, 03:15 PM
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#1
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12 Second Club
Join Date: Aug 2004
Location: West Milford
Posts: 8,373
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jumpy idle after bbk tb install
i installed my 80mm BBK TB and the idle likes to jump from 1000rpm to about 1500rpm constantly, sometimes its not as bad but it still surges. i checked for any leaks around the TB and all hoses... nada. the IAC is clean and appears to be functioning, any ideas?
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03-28-2009, 03:38 PM
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#2
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10 Second Club
Join Date: Aug 2005
Location: lake hopatcong
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check ur tps?
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TMR performance
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03-29-2009, 12:55 AM
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#3
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11 Second Club
Join Date: Feb 2008
Location: Edison, NJ
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Does it have a hole drilled in it?
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03-29-2009, 10:06 AM
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#4
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Hippy Mod, Bergermeister Meisterberger, Moderator
Join Date: Aug 2004
Location: Ewing
Posts: 6,216
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Did you check the bellows to make sure you didn't rip it? Any air getting in past the MAF will throw off the computer. The only other thing besides the tps is if the iac is cycling in and out. Did you disconnect the battery to let the computer reset itself?
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03-29-2009, 11:12 AM
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#5
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12 Second Club
Join Date: Aug 2004
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Quote:
Originally Posted by NJ Torque
Does it have a hole drilled in it?
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yes, came that way
Quote:
Originally Posted by JL8Jeff
Did you check the bellows to make sure you didn't rip it? Any air getting in past the MAF will throw off the computer. The only other thing besides the tps is if the iac is cycling in and out. Did you disconnect the battery to let the computer reset itself?
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i had to trim the smooth bellow down when i installed the TB, im pretty sure its sealed all around, i sprayed soapy water to see if it got sucked in anywhere.
i reset the computer a bunch of times, and i just installed a PCMforless tuned computer
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88 Camaro
95 Impala SS
97 Trans Am WS6
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00 Corvette
04 CTS-V
04 Grand Cherokee
06 GMC Sierra
07 Sublime Charger Daytona
12 Tahoe LT
17 Malibu LT
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03-29-2009, 01:24 PM
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#6
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12 Second Club
Join Date: Aug 2004
Location: West Milford
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well after looking at the TB blade, that hole drilled looked like it was done by a previous owner of the TB, i bought it used.... so i put a small screw in the hole and tightened everything up and the idle seems normal so far....
why would one dill a hole in there anyway!?!
__________________
88 Camaro
95 Impala SS
97 Trans Am WS6
98 Blazer ZR2
00 Corvette
04 CTS-V
04 Grand Cherokee
06 GMC Sierra
07 Sublime Charger Daytona
12 Tahoe LT
17 Malibu LT
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03-29-2009, 01:40 PM
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#7
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10 Second Club
Join Date: Feb 2008
Location: Eatontown
Posts: 1,647
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there is a hole in the blade so that the engine can pull in some air at idle. usually someone would drill another hole, or a bigger hole if you install a bigger cam. bigger cam=need for more air at idle
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03-29-2009, 06:43 PM
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#8
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11 Second Club
Join Date: Feb 2008
Location: Edison, NJ
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thats why i asked 
its a half-assed way when your tuner cant get your car to idle.
__________________
1999 Z28 Convertible. 6 speed swap, wide cowl hood, full hockey stripes, and a whining 10 bolt.
2008 Sierra Vortec Max. 6.2 swapped, headers, Magnaflow catback, GMPP CAI, NHT optioned tow package.
2006 GTO, 11.48 @ 118.3
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03-29-2009, 11:51 PM
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#9
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12 Second Club
Join Date: Aug 2004
Location: West Milford
Posts: 8,373
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so i checked my old TB and its got a hole also...
i plugged up the hole in the BBK and it idles normal again... weird
__________________
88 Camaro
95 Impala SS
97 Trans Am WS6
98 Blazer ZR2
00 Corvette
04 CTS-V
04 Grand Cherokee
06 GMC Sierra
07 Sublime Charger Daytona
12 Tahoe LT
17 Malibu LT
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03-30-2009, 07:47 AM
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#10
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Hippy Mod, Bergermeister Meisterberger, Moderator
Join Date: Aug 2004
Location: Ewing
Posts: 6,216
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The hole is only needed if you have a bigger cam and it needs the extra air to maintain idle. What did you cover the hole with? You don't want anything that can fall off and get sucked into the engine. I would either send it back or trade it for one without a hole. The guy should have told you it had the hole drilled in it.
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69 Z28 JL8 4 wheel disc brakes - being restored
09 Silverado Z71
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