need some help
04-20-2014, 09:22 AM
#1
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need some help
hey guys have you ever saw a 98 4.2l ever be lean on bank 2 and rich on bank 1 have replaced maf,iac,egr,all injectors,plugs,and wires,upper and lower intake gaskets,pcv valve and lines all vac lines.changed any thing i thought could have something to do with it bank 2 +25 ltft +7stft,bank1 -18 ltft -2.3stft i have also replaced cat,o2s. dont understand i have to have vac leak but whats going on with bank 1. i have also cleaned everything while it was apart.any help will be appreciated thanks
04-20-2014, 10:31 AM
#2
check the evap canister back above spare tire. mine the solenoid had rotted off. also found the rubber elbow n the bottom of the throttle body directly under the air idle control was bad
04-20-2014, 10:47 AM
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thanks have already replaced pcv elbow didnt think of evap can but this thing still does this with all vac lines unpluged and sealed have went as far to close off all lines including theegr still feul trims way off the can vac leak cause the fuel trims to do whats going on i think the vac leak is in the intake at the imr bearing but fuel trim is what is throwing me off thanks for all input