1st dyno tune, left bank lean at WOT...
10-15-2006, 11:01 AM
#1
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1st dyno tune, left bank lean at WOT... Guys,
Had everything running good at my 408's first dyno, then when we started with WOT runs, the left (passenger) bank started to run lean. The O2 sensor showed alot of oxygen once we started to get on it. The #6 spark plug looked different then all the others, like it wasn't burning. We replaced the plug, checked the coil and wire and everything was good. So that left the injector(44lb AC Dleco), so I ordered a new one. Any other ideas?
Stroker2112
408ci(LQ9), Eagle 4" crank, Forged Diamond pistons, 4340 Rods, ARPs, LS6 243s (CnC'd), Torquer2 cam, SS rollers, Chrome Moly rods, Patriot GOld Duals, True dual flowmasters, K&N AIr, Stock intake/80mm TB.
Had everything running good at my 408's first dyno, then when we started with WOT runs, the left (passenger) bank started to run lean. The O2 sensor showed alot of oxygen once we started to get on it. The #6 spark plug looked different then all the others, like it wasn't burning. We replaced the plug, checked the coil and wire and everything was good. So that left the injector(44lb AC Dleco), so I ordered a new one. Any other ideas?
Stroker2112
408ci(LQ9), Eagle 4" crank, Forged Diamond pistons, 4340 Rods, ARPs, LS6 243s (CnC'd), Torquer2 cam, SS rollers, Chrome Moly rods, Patriot GOld Duals, True dual flowmasters, K&N AIr, Stock intake/80mm TB.
10-15-2006, 12:10 PM
#2
did you try swapping parts left to right? that would locate the problem w/o spending any money. also, other ideas might be vacuum leak on the left side of the intake, or poss. out of proper adj. pushrod length. my guess though is the 02 is bad. Id start with swapping the 02's.
