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smarsenal -> Help!!!! Major Issue!! (3/25/2008 6:13:35 PM)
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I've got an EVO IX with following mods: -ported exhaust manifold (Buschur) -3" downpipe (Buschur) -BLOX 3 " Testpipe -Buschur UICP with stock BOV -Buschur cold air intake MAF -Buschur inline MBC at 20 psi Anyways, I just replaced the spark plugs with the same as stock (NGK Laser Iridium) plugs. Very easy job I thought. I went with the pre-gap on the plug as it came (about 0.24) . Well, as soon as I started it up, it was idling very rough, then it started to back fire and misfire. I then tried to increase the gap to 0.26 and same thing. Then I tried to under-gap it (0.22) and once again the same thing!! So now I tried to put the old plugs in and once again, same misfire and backfire along with rough idle. I can smell a lot of fuel as it sits at idle. Can this be an air:fuel ratio issue. Please help, I need to get this car running soon!!! Thanks in advance!!
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