lq9 in and its a dog!!!!!!!
#1
lq9 in and its a dog!!!!!!!
What gives I pulled out the 4.8 auto and put in a lq9 6 speed in , the motor has a 226/226 .585/.585 on 112 lsa, ls6 intake, 42lbsvo's , longtubes, no cats, 6 speed 4.56 gears. something is not right, its a rcsb truck when I'm in 5th and 6th gear it is missfireing. My stock fuel pump should support it right?? Maybe I should change plugs? I will call Jesse tomorrow and see what he says about the tune. Whatta you guys think?
#3
Originally Posted by DLH2006
i would check that pump, might not be enough, mine wasnt! but given your mods its probably a tuning issue. Any ses lights?
Did you install your fans?
Did you install your fans?
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#8
Launching!
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if your truck runs strong through the rpms then its not you fuel pump it should be cutting out around 4-6k rpms if it was a pump. if its only really missing in 5th and 6th gear then it sounds like an ignition problem. like plugs or wires.
#9
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Something's definitely wrong cause you should be making almost twice the hp as before with that combo. I would recommend using only the OEM iridium plugs but it's not going to make that much difference. I would think it's a tune or fuel issue... maybe rockers incorrectly torqued and lose or adjustable rockers incorrect with valves hanging open. Is there any excessive valvetrain noise?
#10
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is it a mail order tune?? if so more than likely its the tune..get a dyno tune man its so much better and no guess work for jesse or nelson or who ever does them..not knocking them down they are realky good at what they do, but for the mods you got its kinda hard to guess the right numbers in your tune...hell i may spend an hour or all day tuning vehicles..i dont see how some one can get it right the first time..