lazy rev, 20to1 a/f at a slight rev
05-11-2007, 11:28 PM
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lazy rev, 20to1 a/f at a slight rev made my last pass tonight and it started idleling different. 12.5/1 to 14.5/1 at idle (hard to keep up with it). it is a fast dual bank wideband. it revs real slow. almost like a diesel does. not throwing a ses light, no abnormal engine noises. almost sounds like i did a cam swap it is idleing so different.
could it be
1- bad o2 sensor(s)
2- tps gone bad
3- ?
4- ?
could it be
1- bad o2 sensor(s)
2- tps gone bad
3- ?
4- ?
05-13-2007, 12:17 PM
#2
Bad injector or two? Loose wiring or bad connection to the injectors? That could explain a shitty idle and it going dead lean.
But also if it runs super rich or is not firing a cylinder, the o2 will still read lean because of the unburnt oxygen in the exhaust.
But also if it runs super rich or is not firing a cylinder, the o2 will still read lean because of the unburnt oxygen in the exhaust.
05-13-2007, 12:24 PM
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it is idling fine. what i meant by a cam change is that it is idling like i put a smaller cam in it, so its idling better. it started at the end of a run. something broke and the engine revved past 7k and thats when my problems started. drained the oil and no metal.
05-16-2007, 04:00 PM
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pushrods- ok
leakdown test- ok
replacing o2 sensors tommorow. (may have hurt them with fuel additive and race gas)
this is my 1st ls1 car that i built. what datalogging software does everyone use? i was using datamaster for my lt1 cars. will datalogging help me trace down misfires? i am changing plugs and wires as soon as ups delivers them.
leakdown test- ok
replacing o2 sensors tommorow. (may have hurt them with fuel additive and race gas)
this is my 1st ls1 car that i built. what datalogging software does everyone use? i was using datamaster for my lt1 cars. will datalogging help me trace down misfires? i am changing plugs and wires as soon as ups delivers them.
