bad miss after header install
bad miss after header install I got the headers installed last week, and had the car running just fine for a couple of days, but now the car has a bad miss in it. New plugs and wires were installed in it last year, so I reused those becuase they were just fine. 1 new o2 sensor, and one that is a few years old. When the tech 1 is plugged into it the o2 activity looks normal. Can brand new stainless foul out the o2's? The headers are LPPs.
It's doubtful that your uncoated headers are affecting the O2s. O2s have a coating around the element to prevent damage to the zircona. Ceramic coating has been known to cause degradation of this coating, but uncoated stainless has no major contaminants that can foul them out.
95% of mis-fires after header installs are caused by wiring/plug issues. Take a look under the hood at night and look for any spark leakage.
JMO.
95% of mis-fires after header installs are caused by wiring/plug issues. Take a look under the hood at night and look for any spark leakage.
JMO.
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It didn't have a code. The light is out now and the only code it has is an intermittent egr code. It always has a miss. No matter how fast the engine is turning though, so my mechanic and I are pretty positive that the egr thing has nothing to do with it. If that had anything to do with it the car would run fine going down the highway, but it doesn't. And no I don't have a bad mechanic, so don't even start on that.
Damn it! Now I need new plug wires. 
I guess its time for an upgrade. What do you guys use to keep the wires away from the primaries? I was using zip ties, and that is why it ended up touching the header. One of the zipties melted. I had plug wire separator type things (I don't know exacly what to call them) but they wouldn't fit/hold the wires away so I didn't use them.
I guess its time for an upgrade. What do you guys use to keep the wires away from the primaries? I was using zip ties, and that is why it ended up touching the header. One of the zipties melted. I had plug wire separator type things (I don't know exacly what to call them) but they wouldn't fit/hold the wires away so I didn't use them. Last edited by Slow94Formula; Aug 2, 2010 at 11:31 PM.
Damn it! Now I need new plug wires. I furess its time for an upgrade. What do you guys use to keep the wires away from the primaries? I was using zip ties, and that is why it ended up touching the header. One of the zipties melted. I had plug wire separator type things (I don't know exacly what to call them) but they wouldn't fit/hold the wires away so I didn't use them.
I furess its time for an upgrade. What do you guys use to keep the wires away from the primaries? I was using zip ties, and that is why it ended up touching the header. One of the zipties melted. I had plug wire separator type things (I don't know exacly what to call them) but they wouldn't fit/hold the wires away so I didn't use them.
