Air/Fuel Mixture too lean, help.....
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Air/Fuel Mixture too lean, help.....
I can drive my evo through town and on the freeway as long as I don't boost. But the second I boost it spools up and then misfires, and I'm assuming its because its not getting enough fuel. Has anyone experienced this? What can I do to solve this "lean" problem? Could it be a faulty injector? Could it be a faulty Walbro 255? Thanks
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I can drive my evo through town and on the freeway as long as I don't boost. But the second I boost it spools up and then misfires, and I'm assuming its because its not getting enough fuel. Has anyone experienced this? What can I do to solve this "lean" problem? Could it be a faulty injector? Could it be a faulty Walbro 255? Thanks
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Im not sure, their NGK's and they were done at 22,000 miles, the car now has 36,009 miles. I talked to the previous owner and he said that it would do the same thing to him, he said that I'm driving it in-correctly, which makes sense. If im on the freeway in 5th gear at 70mph at 3000-3500rpms, he said the way the car set up that if I put my foot to the floor in that scenario I will lug the turbo and it will feel like I'm miss-firing, he said that I need to be in 3rd-4th gear in that scenario. The rain stopped last night so I took her out and had no problem at all, it drove very nicely. He also told me the way the car is tuned that it has to run lean when I'm boosting because of the 100% methanol tune thats in the car. It just scared me seeing the air/fuel drop so low, Sorry for the false alarm guys...
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#7
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sounds like u need a new set of plugs gapped properly, and have a couple datalog pulls to rule out if your knocking, or if your drivetrain is giving off phantom knock, which can happen at highway speeds, use mitsulogger or somethin equivalent get that checked then go from there. If you pull the plugs, check coil boots and plug wire boots for cracks, and re lube them before reinstall with dielectric grease, issue still persists at least you ruled out # 1 possible cause then go from there. Are you sure all vacuum lines are connected? fpr? other lines? etc....
good luck
good luck
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sounds like u need a new set of plugs gapped properly, and have a couple datalog pulls to rule out if your knocking, or if your drivetrain is giving off phantom knock, which can happen at highway speeds, use mitsulogger or somethin equivalent get that checked then go from there. If you pull the plugs, check coil boots and plug wire boots for cracks, and re lube them before reinstall with dielectric grease, issue still persists at least you ruled out # 1 possible cause then go from there. Are you sure all vacuum lines are connected? fpr? other lines? etc....
good luck
good luck
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I am running a meth kit, ya i understand. My buddy scared me to death when he said I was running lean and then I talked to ER and I believe Aaron said that it has to lean with the meth.
#13
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Ok, I will get a new set of plugs and have them gapped properly. What kind do I get and how much do I gap them? The previous owner said that thier particularly gapped to this tune from ER. As of yesterday, I took it out to see if it would shutter under boost again in 2nd gear and it did, so I stopped driving it right away. Thier is now a light consistent tapping in the top back left corner of the engine bay. Some of my buddies said that it could be an small exhaust leak, could be a faulty injector, could be a dirty injector. I just need to take it down to ER for peace of mind, I'm just afraid to drive it down...
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