High Flow throttle bodies - Page 4 - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat

Performance, Brainstorming & Tuning Talk about modifications, or anything else associated with performance enhancements. Have a new idea for performance/reliability? Post it here. No idea is stupid! (please use Detailing and Appearance for cosmetic ideas)

Thread Tools Search this Thread
Old 07-08-2005, 03:24 AM   #31
Senior Member
True Car Nut
Join Date: Feb 2003
Location: Bloomington-Normal, IL 1997 SE
Posts: 3,734
Thanks: 0
Thanked 0 Times in 0 Posts
macho_mike21 is on a distinguished road

Originally Posted by PontiacDad
Been having problems with high idle since the start, it stalled on Pmom yesterday and set the ses light (P507 high idle).
I have a big trip on the weekend and was thinking of swapping back to stock last night.
I read more about the mini afc and tunning and was sure I was doing everything right but the idle was driving me crazy.
So in an attempt to try anything I removed the afc.......hey the idle went down?
Check the scanner and all looked normal too? Ltft were sitting at +1 in park and dropped to -1 while in drive (brake held). I just scanned again as pmom has been running around town today and everything is in check, no afc and idle, maf, O2'* are all good?
Afc'* and bonne'* dont seem to mix well and for some odd reason the pcm can take in all the info from the ported tb and run just fine?
I'm going to take my stock tb with me just in case though, you never know
do you still have the performance gain?

If you are pulling more air the O2 sensor will see it and adjust the fuel accordingly.
macho_mike21 is offline   Reply With Quote
Old 07-08-2005, 03:33 AM   #32
Senior Member
True Car Nut
Thread Starter
Join Date: Jun 2003
Location: Purgatory
Posts: 6,313
Thanks: 0
Thanked 0 Times in 0 Posts
PontiacDad is on a distinguished road

Yes had it out tonite with no afc, made several hard launches and a few high speed runs. No problems what so over and good clean scan....bit of kr at 5k in 2nd but settled quickly, I only have 91 octane couldnt find better
PontiacDad is offline   Reply With Quote
Old 07-08-2005, 09:04 AM   #33
Senior Member
True Car Nut
Join Date: Jul 2003
Location: Westerville, Ohio 2000 Black SSEi
Posts: 6,127
Thanks: 0
Thanked 0 Times in 0 Posts
Rogue is on a distinguished road

If you recall, I always had issues with my AFC. It would seem the car would unlearn the changes after 3 or so passes.
Rogue is offline   Reply With Quote
Old 07-08-2005, 03:17 PM   #34
Senior Member
Posts like a Corvette
Join Date: Jan 2004
Location: Montréal, QC
Posts: 1,374
Thanks: 0
Thanked 0 Times in 0 Posts
Foghorn is on a distinguished road

I would reset the PCM by disconnecting the battery for 3 minutes. Since the AFC is now gone, the reset will put the LTFTs back to zero and start the learning process using new values instead of stored values.

Make sure to do a scan rolling into WOT at between 48 & 64 MPH, log the MAF frequency, MAP in Kpa, LTFT, STFT, O2 value, IPW, TPS %, MPH and RPM.

Let us know...

Foghorn is offline   Reply With Quote

Related Topics
Thread Thread Starter Forum Replies Last Post
Per blocking coolant flow to throttle body of 3.8L David C Buick 16 10-13-2015 03:47 PM
are 92 and 93 ssei throttle bodies interchangeable? billha 1992-1999 4 12-13-2007 10:49 AM
throttle body flow firebuick Performance, Brainstorming & Tuning 13 09-15-2007 11:21 PM
Need pics of Throttle Bodies OLBlueEyesBonne General GM Chat 4 03-16-2005 01:58 AM
Port/ polishing throttle bodies 94 SSE with Sizzle Performance, Brainstorming & Tuning 8 03-06-2004 12:23 AM

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

All times are GMT -4. The time now is 04:33 AM.

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.