You really need to get a speed density tune. Try unplugging your MAF and see if it still surges and gives you problems. Don't drive it too long like that, only long enough to determine if its the MAF giving you problems.
You really need to get a speed density tune. Try unplugging your MAF and see if it still surges and gives you problems. Don't drive it too long like that, only long enough to determine if its the MAF giving you problems.
See my truck data in the "My Garage" section here... http://www.ls1truck.com/forums/my-ga...tml#post191709
Do you need a dyno to do a speed density tune? and what is it exactly
A speed density tune uses a 2 bar map sensor instead of a MAF sensor. It allows you to tune based on manifold boost pressure. Basically, it has to be done live and allows the tuner to dial in more accurately than tuning through the MAF. At a certain point(varies depending upon mods), your MAF runs out of table/range and the tuner must "guess" how much fuel to add. It can be done just not as accurate. And no you do not need a dyno, just a lot of normal/aggressive driving.
2004 Silverado Crew Cab, forged iron 5.7, STS w/MP turbo, 10+ psi, FMIC, Tial 50mm BOV, Vic Jr, Snow performance meth, MTI Stealth cam .220/.220 .581/.581 115lsa, Comp chromoly pushrods, Yank TT3000 stall, LS1 Efans, 160 tstat, Trucool 40k trans cooler, 60# injectors, Walbro fuel pump, Patriot springs, Built 4l65E w/billet input & output shafts, Eaton posi, SD tuned...all installed by Klein North Automotive
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