496 ho/headers to lean?
#31
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OK, doesn't appear to be anything going on there. It could be a dead cylinder. Try killing one cylinder at a time and see if you've got one not firing. Broken spark plug while installing headers possibly? I found a grounded wire to a coil once that was killing a cylinder on a brand new boat. Customer kept complaining about lack of power/rpm. It still turned over 4200 RPM on 7 cylinders.
#34
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I think I found the problem. Number 1 cylinder plug was wet with gas it turnes out that it had enough contact for system check, because I unplugged another coil and openned the key and alarm beep one short beep follwed shortly by two short ones indicating fault.
I tried unpluggin one coil at time but the motors idle did not change. So I tried one of those spark tester that goes between plug wire and plug. It was easier than try to reach each coil under the electronics.
I isolated plug, wire, coil, and after pluggin everything back # 1 fired like a charm. Found the grimlin.
Water retest coming soon
Thanks guys , coulndn't have done it without everybodys help.
I tried unpluggin one coil at time but the motors idle did not change. So I tried one of those spark tester that goes between plug wire and plug. It was easier than try to reach each coil under the electronics.
I isolated plug, wire, coil, and after pluggin everything back # 1 fired like a charm. Found the grimlin.
Water retest coming soon
Thanks guys , coulndn't have done it without everybodys help.
#36
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Myself, Boatingbent and TX_Instigator all run Lightnings with 02 sensors. The Nordics use a custom low port exit header so the collector is pointing at a steep downward angle where the 02 sensor goes. They won't work on the standard lightnings. I learned that the hard way.
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Those sensors on the 496 HO in headers are temp sensors, they atach to water jacket in the header and not exhaust. I noticed that when I put on the headers. I have replaced a few 02 sensors in my line of work and they don't resemble anything like this.
the sonsors were solid brass just like temp sensors, or am I wrong?
the sonsors were solid brass just like temp sensors, or am I wrong?
#38
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Those sensors on the 496 HO in headers are temp sensors, they atach to water jacket in the header and not exhaust. I noticed that when I put on the headers. I have replaced a few 02 sensors in my line of work and they don't resemble anything like this.
the sonsors were solid brass just like temp sensors, or am I wrong?
the sonsors were solid brass just like temp sensors, or am I wrong?
Thanks Bob, I was hopping that vertical collector was enough to keep the water off the sensor. I have a pyro gauge that reads the # 2 cylinder but really would like to know the A/F also. I will get the bungs welded in during the off season. For now I will just keep an eye on the plugs.
#39
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We added the 02 sensor bungs to the headers to monitor the A/F ratios.
Those sensors on the 496 HO in headers are temp sensors, they atach to water jacket in the header and not exhaust. I noticed that when I put on the headers. I have replaced a few 02 sensors in my line of work and they don't resemble anything like this.
the sonsors were solid brass just like temp sensors, or am I wrong?
the sonsors were solid brass just like temp sensors, or am I wrong?
#40
found my issue bad seapump I guess a little sand smokes the brass pump, They dont make enough pressure at idle , the steam would go away as long as I was moving Im also running imco lowers