View Full Version : redtop lean issues

07-23-2013, 02:12 PM
Well after getting my sr running im having a odd problem i cant fix for anything.
Im getting 150-200 miles per tank which isnt where ive been reading i should be.

The car itself tho is running very lean, maxes out my afr gauge when on idle or cruising at the same speed. If i give it gas to accelerate the afr jumps up back to normal, around 11 on wot. Also when my afr drops to above 18 my cruise becomes very choppy and power cuts in and out.
My boost gauge says im running an average of 11-12 vacuum while cruising.
last time i pulled the plugs they were solid white, which doesnt make since to be because of horrible mpg and my exhaust has black soot all over the muffler tip.

Pretty much stock everything with the usual, walbro 255, fmic.
Let me know any ideas and thanks for any help ill try to respond to any questions asap

07-23-2013, 02:28 PM
Bad coil pack? works well enough to drive, could cause lean issue

07-23-2013, 04:36 PM
i highly doubt its the coil, seems to pull fine on wot. Wasn't until recent i started highway driving it and it really shows now. In town driving i hardly notice as im not staying at a single rpm

07-24-2013, 10:53 AM
Sounds like a vacuum leak somewhere.

07-24-2013, 01:17 PM
Any advice on how to check for leaks besides just start replacing lines?

Also thinking of vacuum issues, would a leaky bov cause this? to much air= running lean?
I still have the cheapo bov that came with my fmic kit. If i remember correctly i tightend it as much as i could by hand then tightened the nut. (im gonna adjust it correctly now see if it helps)

07-26-2013, 05:08 AM
found the problem. i feel like an idiot.
my hose from my bov to the intake had a kink in it. fixed it so it wont happen again and cars running perfect.