codes po171-po174 lean both banks
12-09-2007, 11:43 AM
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codes po171-po174 lean both banks some missfires in all cylinders at about a 1000 after 3-4 minutes, both
banks lean and at 25 % on both long trims, short trims are at 50 %
what seams odd to me, didnot check fuel pressure yet, this is
on a cold start up 10 degrees this morning, could be gas thats
bothering this or cold been going on for a while, light comes and goes
during the day. maby o2 switch time maby slow, seamed to be allright.
intake gaskets maby the pleneum gaskets. 50 thou on car replaced
plugs with some cheaper tr55s 25000 ago.. anyone, thanks and merry christmas.................................
banks lean and at 25 % on both long trims, short trims are at 50 %
what seams odd to me, didnot check fuel pressure yet, this is
on a cold start up 10 degrees this morning, could be gas thats
bothering this or cold been going on for a while, light comes and goes
during the day. maby o2 switch time maby slow, seamed to be allright.
intake gaskets maby the pleneum gaskets. 50 thou on car replaced
plugs with some cheaper tr55s 25000 ago.. anyone, thanks and merry christmas.................................
12-09-2007, 12:33 PM
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It's trying to trim and hitting the stops. Look at the front O2s
and see if they are stuck low, or bottomed only at idle (heat
problem?). See if you believe the MAP and MAF readings too.
You might check fuel pressure at the rail, I guess this time of
year you could have water / ice in the fuel system. But this
you'd think would kill it up top before bothering idle.
and see if they are stuck low, or bottomed only at idle (heat
problem?). See if you believe the MAP and MAF readings too.
You might check fuel pressure at the rail, I guess this time of
year you could have water / ice in the fuel system. But this
you'd think would kill it up top before bothering idle.
