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| Naturally Aspirated No boost under your hood? You can still feel the love here. |
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06-15-2008, 09:47 PM
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3800 Newbie
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Steven Tamplin
2003 Monte Carlo SS
Location: Newnan, GA
Join Date: May 2008
Posts: 16
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03SS holds the following arcade championships:
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reflash?
I just got a CAI and exhaust put on my car. I was told to disconnect the battery for about 20 minutes so the computer will learn the new airflow perimeters. Is this correct?
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06-15-2008, 11:44 PM
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3800 Guru
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Chris Bores
99 Grand Prix Gt
Location: Ohio
Join Date: Aug 2007
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yes it takes 15 to 20 mins for the pcm to forget(reset) the ltft's (long term fuel trims). is it needed? i highly doubt it but you can do it if you like. lets say you did then the car would learn new ltfts based on the current modds... which i think it would do without having to do reset the pcm. maybe some others can comment
__________________
custom cai, custom exhaust, hv3, intense pcm, 180 t-stat sd hood, zzp stage 2 tb, intense stg 1 cam, hptuners, and headers. spun 2 rod bearings on two different rebuilds! future modds top swapped genv,intercooled,cam,and much more
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06-15-2008, 11:50 PM
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3800 Guru
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Thomas Martin
2000 Buick Park Avenue Ultra 3800 SC F41
Location: Rockford, IL
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n0dih holds the following arcade championships:
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It isn't needed, the PCM learns really at an astounding rate when you drive.
Drive NORMALLY for say 20 min and vary the driving, normal, not punching it or getting on it hard, just drive normal, lug it, higher rpm in manual gears, etc will cover all bases pretty well.
When you punch it learning is disabled.
So no need, clearing PCM is rarely, if ever, needed.
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06-16-2008, 03:18 AM
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3800 Newbie
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Steven Tamplin
2003 Monte Carlo SS
Location: Newnan, GA
Join Date: May 2008
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03SS holds the following arcade championships:
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thanks for the help guys 
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06-16-2008, 10:07 AM
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3800 Senior Member
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lee lamontain
1998 gtp coupe
Location: new york
Join Date: Oct 2007
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gtp400hp holds the following arcade championships:
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agreed, for the most part. with the mods you have done the computer will need no help in adjusting it's self. now if you move into bigger mods, like: ported throttle body, heads, cam, injectors. not only will you need to do a fuel trim relearn, but alot of tunning with the pcm will be involved.
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xp hot cam, jp double roller, comp 7.05 pushrods, comp oer lifter, 105 spring, comp pro magnum 1.7 rockers,viton seals, manley retainers, ported heads, supercharger, and intake, cometic .052, arp head studs, clevite77 bearings, arp rod bolts, tuned pcm, slp headers(wrapped)no cat, no ubend,no resonator, egr delete,slp power flow 3in cat back, 103's, 160 thermo, 3in pulley, fender well intake, dhp programer.
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06-19-2008, 01:39 AM
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3800 Newbie
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Steven Tamplin
2003 Monte Carlo SS
Location: Newnan, GA
Join Date: May 2008
Posts: 16
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03SS holds the following arcade championships:
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what is a fuel trim relearn and how do you do it?
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06-19-2008, 01:52 AM
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Proud customer of Sinister Drag Design!!
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Mike Stiemann
2002 grand prix gtp
Location: Oswego, il
Join Date: Apr 2008
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12.99someday98 holds the following arcade championships:
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Quote:
Originally Posted by 03SS
what is a fuel trim relearn and how do you do it?
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It resets the fuel trims in your car. These guys know what they are talking about so don't reset them because you really don't need to. However disconnecting the batter for about 20 min. will reset them. If you do choose to take this route you have to drive around city, highway, idle so the car can relearn all the trims again and during this whole process you can't floor it. let the pcm do its job and leave the trims alone for now. after more mods maybe you'll want to, but i would get an aeroforce scan gauge so you can see where your fuel trims are to see if you even need to reset them.
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2002 gtp 4inch intake, 3.2 pulley, msd coils, msd wires, 104/103 plugs .055/.030 gap, 60# injectors, hpt, e85, 1.95 roller rockers, paceruster headers, 160 thermostat, 85mm maf, b&g lowering springs, strut tower braces front and back, nx dry kit, alky injection, tranny man trans (i freakin' love it!!) and electric water pump.
New pb.... I RAN 11's!! 
PB 12.83@102/1.83 60'  no spray. best mph 106.16
PB 11.84@115.56 1.76 60'  with spray.
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06-19-2008, 09:27 PM
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3800 Newbie
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Steven Tamplin
2003 Monte Carlo SS
Location: Newnan, GA
Join Date: May 2008
Posts: 16
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03SS holds the following arcade championships:
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gotcha
thanks for the help
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