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leaky inj?, but im running lean!

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alvin87gn

Member
Joined
Jun 7, 2005
Messages
146
alright, ive been having lean issues so i checked the pump psi @ wot its ~60 psi @15 lbs boost, 9.6 KR @.375 mv (thats the worst reading in my scanmaster recall) so i checked to see if my system was leaking pressure somewhere cause my pump seems to be at least border line. pressure bleeds of from 40 to 0 in a little under half hour, clamped fuel supply, clamped return, clamped em both, still the same leakage. if an injector were leakin into the intake wouldnt this thing run perdy fat? i mean it runs great, if it werent for the scanmaster showing high KR i would think the thing runs perfect.
87 gn walbro 340 hotwire, msd50, joe lubrant chip-93octane-18deg-50#
bgc stretch IC accufab afpr
:mad:
 
9.6 KR at 345 aint running great ,you're lean and the kr shows its not good , youve got issues to resolve

the leaking injector(s) would give you fuel in the cylinder(s) at startup it might smoke but as to it having an affect of being fat driving would be if it were to get stuck open

there could debris buildup at the tip(s) and 1/2 hour leakdown isnt much of a leak but it could also be getting stuck closed and restricting flow ,
check your plugs and see if you find any odd plugs that might be burned (grey) from leaning out . see if you can narrow it down as to which injector(s) is leaking . consider getting them cleaned and flowed before you hurt something
 
ditto

Injector may leak while sitting(not good) but also not spray enough at WOT. Do what pacecarta said,if that's O.K. look to air metering, MAF? vacuum leak? exhaust leak?
 
my spark plugs all look the same, i changed them sunday, they have a very slight grey to the side electrodes but the rest of the plug is fairly dark. I will be cleaning the inj here shortly, and im gonna try installing the chip marked "50#1100 idle street" that came with this car. (the one im curently using only says 93 50#)just to see if maybe the chip has an aggresive timing setting, er something
 
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