Ok, riddle me this...
Both my LTFT's on B1 and B2 have historically been around +4~6%, sometimes as high as 8, at idle since I've been over 150k miles on the clock. Just today i plug in my obd2 and i see them sitting at 11 and 12. They do drop to or close to zero under load. Now initially I'm beginning to think vacuum leak..but a quick check (wiggle) of the hoses i can get to doesn't reveal anything (no drop in %, it's fairly static). So dunno..i guess i gotta take a more in depth look-see tomorrow but here's my question below..
2 things are different in the last few weeks from months past...a) i stopped and filled up at a non top tier, mom and pop station because well, I had too. I found myself in bfe around the backside of Mt st. Helen's recently needing gas and didn't want to chance running out. And b) i used up an old, opened bottle of fuel ST motor cleaner I used on my OPE this last summer. I thought the bottle was tightly closed but when I dumped it into the tank i noticed there was a yellowish color to the fluid (i think it's supposed to be clear) and plastic pour spout. I dumped it in anyways ignoring better judgement but now I'm wondering if there was gum or varnish forming?? Is this possible? Or is it possible the unknown quality of the fuel i picked up, either one is clogging an injector, pump, filter or something in the fuel delivery.. because nothing under the hood has changed and all my hoses appear to be in good shape/fairly young in their service.
I just don't wanna start pulling crap off if i can avoid it (TB has to come off just to check the pcv and brake booster systems/hoses) if there's a chance i just inadvertently introduced something into the fuel system and maybe it's nothing a good strong cleaner can't resolve... thoughts?
(not one but both banks simultaneously jumped to double digits lean %, no CEL or pending..so maybe a fuel clog/restriction??)
Both my LTFT's on B1 and B2 have historically been around +4~6%, sometimes as high as 8, at idle since I've been over 150k miles on the clock. Just today i plug in my obd2 and i see them sitting at 11 and 12. They do drop to or close to zero under load. Now initially I'm beginning to think vacuum leak..but a quick check (wiggle) of the hoses i can get to doesn't reveal anything (no drop in %, it's fairly static). So dunno..i guess i gotta take a more in depth look-see tomorrow but here's my question below..
2 things are different in the last few weeks from months past...a) i stopped and filled up at a non top tier, mom and pop station because well, I had too. I found myself in bfe around the backside of Mt st. Helen's recently needing gas and didn't want to chance running out. And b) i used up an old, opened bottle of fuel ST motor cleaner I used on my OPE this last summer. I thought the bottle was tightly closed but when I dumped it into the tank i noticed there was a yellowish color to the fluid (i think it's supposed to be clear) and plastic pour spout. I dumped it in anyways ignoring better judgement but now I'm wondering if there was gum or varnish forming?? Is this possible? Or is it possible the unknown quality of the fuel i picked up, either one is clogging an injector, pump, filter or something in the fuel delivery.. because nothing under the hood has changed and all my hoses appear to be in good shape/fairly young in their service.
I just don't wanna start pulling crap off if i can avoid it (TB has to come off just to check the pcv and brake booster systems/hoses) if there's a chance i just inadvertently introduced something into the fuel system and maybe it's nothing a good strong cleaner can't resolve... thoughts?
(not one but both banks simultaneously jumped to double digits lean %, no CEL or pending..so maybe a fuel clog/restriction??)
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