lean condition....HELP!
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lean condition....HELP!
ok so i have a lean condition code up.thats hunted me forever.
he cr ran good for some time and then cel.
so far i have a new MAF.3 days old.
also i have done 3 pressure tests and they all pass.i also fogged the lines and that passed.
the precat and post cat o2 are brand new
i replaced 90% of all the vac lines
any more ideas?i have a new fuel pressure regulator coming just in case.
i vaged the car block 32 is at +25 at part and +1.5 at idle
the maf reading is 3g/m at ideal
the car misfires under 14+ boost
i also hit soft limp mode.
any thing else i should look at?
current mods
giac chip
diverter valve upgrade
n75j
air intake (can this toss the reading off)(no k&n filter)
3' exhaust (new addition but the code came up before the install)
he cr ran good for some time and then cel.
so far i have a new MAF.3 days old.
also i have done 3 pressure tests and they all pass.i also fogged the lines and that passed.
the precat and post cat o2 are brand new
i replaced 90% of all the vac lines
any more ideas?i have a new fuel pressure regulator coming just in case.
i vaged the car block 32 is at +25 at part and +1.5 at idle
the maf reading is 3g/m at ideal
the car misfires under 14+ boost
i also hit soft limp mode.
any thing else i should look at?
current mods
giac chip
diverter valve upgrade
n75j
air intake (can this toss the reading off)(no k&n filter)
3' exhaust (new addition but the code came up before the install)
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Joined: Sep 2002
Posts: 39,999
Likes: 1
From: NC
that's a bad lean condition. MAF looks fine. I doubt whatever hot air intake you have is causing it
since it's upstream of the MAF and that reads fine. Like BeeeJ said, I'd start looking at the fueling. Is the pump loud? When's the last time you changed the fuel filter? Have you checked the vac line at the back of the intake manifold that leads to the FPR? That's probably the most important vac line on the car.
Thread Starter
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Joined: Jul 2006
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Re: Could be a dirty fuel filter and/or bad fuel pump.
all of the soft lines have been changed.
im going to change the fuel filter and run some cleaner though the engine. but what if i replace the fuel pressure regulator and the fuel filter and the condition is still there what do i do then?
im going to change the fuel filter and run some cleaner though the engine. but what if i replace the fuel pressure regulator and the fuel filter and the condition is still there what do i do then?
Thread Starter
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Joined: Jul 2006
Posts: 15
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Re: lean condition....HELP! Update!!!!
UPDATE: So i changed the fuel pressure reg and the car still misfired then i changed the spark plugs and i fixed the misfire!!!!smooth like new, but i still have the code coming up
at least its not misfiring just limp mode 10psi
how fast should the pressure fall when doing a pressure test at 18psi it took about 25 seconds to fall to zero with my finger over the pancake valve.i think their might be a small boost leak but i cant find it like i said and i fogged the lines and alot of the vac lines and pcv has been replace.
if i change the fuel filter and the code still comes up and no boost leaks what then injectors can a bad wastgate cause this i spike 20 and hold 18 untill it limps out 30 minutes later with a cel???
at least its not misfiring just limp mode 10psi how fast should the pressure fall when doing a pressure test at 18psi it took about 25 seconds to fall to zero with my finger over the pancake valve.i think their might be a small boost leak but i cant find it like i said and i fogged the lines and alot of the vac lines and pcv has been replace.
if i change the fuel filter and the code still comes up and no boost leaks what then injectors can a bad wastgate cause this i spike 20 and hold 18 untill it limps out 30 minutes later with a cel???
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