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2 cylenders running rich
Hey there, got a problem cant seem to figure out.
My #2 & #4 plugs are fouling out. Bad. The other 6 are running good. I switched the injectors, and plugs, and it still on the same 2 cylenders. I mannualy pressurized the intake system to 20pis and no leaks. Spark is good. Compression test matched the other cylenders with only a 2% difference between all eight. I am kind of stumped. Any Ideas? Here are a list of the mods. 93 hard top 331ci level 10 dss machine work on block h beam rods Probe dised -14cc pistons gasket matched y303 heads e cam performer rpm intake long tubes main girdle 7 qt road race pan windage tray spec 4 clutch 3.73 gear alum driveshaft & flywheel t56 6 speed 42# injectors 76 mass air NGK v plugs heat range 7 vortech t trim 15-18 psi AFM powere pipe 255l fuel pump trex fuel pump msd 6462 btm 9mm wires msd coil |
RE: 2 cylenders running rich
well you checked the fuel side I guess..have you chacked you plug wires? dist cap?..also you injector leads could be bad
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RE: 2 cylenders running rich
Checked the wires (switched them around), cap and rotor are new as well. plugs are gapped at .33 as well to prevend high pressure blowout. fuel pressure is set to about 43 static.
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RE: 2 cylenders running rich
so you said you checked the power and and ground for the injector? if 2 cylinders only are running rich it would most likely be a leaking injector on those 2 cylinders. but you ruled that out. the only other thing i could think is the eec is pulsing those 2 injectors too often, and i wouldnt know why it would think to do that? are you running o2 sensors on your exhaust set up?
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RE: 2 cylenders running rich
ORIGINAL: Jester331 Checked the wires (switched them around), cap and rotor are new as well. plugs are gapped at .33 as well to prevend high pressure blowout. fuel pressure is set to about 43 static. arent 5.0 plugs supposed to be gapped around .55? |
RE: 2 cylenders running rich
not with a blower
ORIGINAL: boss429 ORIGINAL: Jester331 Checked the wires (switched them around), cap and rotor are new as well. plugs are gapped at .33 as well to prevend high pressure blowout. fuel pressure is set to about 43 static. arent 5.0 plugs supposed to be gapped around .55? |
RE: 2 cylenders running rich
I am running a new 02 sensor on 1 through 4 side. If an adjustment was being made by the eec for an 02 issue, I would think it would be on 1 through 4, not just 2 and for.
I do think the eec is almost double firing those two injectors as I listend to them with a stehescope (sp?) before and after I switched the injectors to different locations. gap on boosted cars should be less to prevent spark blowout. Keep the ideas comming..... |
RE: 2 cylenders running rich
ORIGINAL: r.barn not with a blower ORIGINAL: boss429 ORIGINAL: Jester331 Checked the wires (switched them around), cap and rotor are new as well. plugs are gapped at .33 as well to prevend high pressure blowout. fuel pressure is set to about 43 static. arent 5.0 plugs supposed to be gapped around .55? haha my bad everyone |
RE: 2 cylenders running rich
ORIGINAL: Jester331 I am running a new 02 sensor on 1 through 4 side. If an adjustment was being made by the eec for an 02 issue, I would think it would be on 1 through 4, not just 2 and for. I do think the eec is almost double firing those two injectors as I listend to them with a stehescope (sp?) before and after I switched the injectors to different locations. gap on boosted cars should be less to prevent spark blowout. Keep the ideas comming..... |
RE: 2 cylenders running rich
Bump :)
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