mystery
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mystery
my 2001 ford e150 4.6 engine falls flat on its face when I try to accelerate to the point of almost stalling.i hooked up scanner(no DTC codes) and noticed that on bank 2(STFT<FT) all numbers were negative,which I assumed was computer trying to lean out.i removed all the fuel injectors on that side,cleaned them well and re o-ringed them.put everything back together.now after warming up engine to closed loop I strem live data and STFT is positive numbers 48%....what did I do?last night before doing all this here were exact numbers
calc load 30.6-31.8
ect 185
stft b1 -2.3%---2.3%
ltft b1 1.6%
stftb2 -4.7%---0.0%
ltftb2 -1.6%
engine rpm 643-654
adv 17.5deg---20deg
iat 77 deg
maf 0.58(lb/min)
tps 17.6%
o2s b1s1 0.415---0.605(v)
02sb1s2 .045-50(v)
o2s b2s1 .100---.725(v)
o2s b2s2 .720(V)
calc load 30.6-31.8
ect 185
stft b1 -2.3%---2.3%
ltft b1 1.6%
stftb2 -4.7%---0.0%
ltftb2 -1.6%
engine rpm 643-654
adv 17.5deg---20deg
iat 77 deg
maf 0.58(lb/min)
tps 17.6%
o2s b1s1 0.415---0.605(v)
02sb1s2 .045-50(v)
o2s b2s1 .100---.725(v)
o2s b2s2 .720(V)
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I would also like to add that ive replaced several parts prior to this condition
fuel pump
fuel tank
fuel filter
air filter
pvc valve
cleaned mass air flow
gas cap
o2 sensor bank 2 both upstream and downstream
complete exhaust(including all four cats)
can a faulty pressure regulator cause this issue????what should ideal pressure be at fuel rail???pulled off vacuum hose...no fuel in vacuum line...…...ganna test with fuel gauge...…will report back
fuel pump
fuel tank
fuel filter
air filter
pvc valve
cleaned mass air flow
gas cap
o2 sensor bank 2 both upstream and downstream
complete exhaust(including all four cats)
can a faulty pressure regulator cause this issue????what should ideal pressure be at fuel rail???pulled off vacuum hose...no fuel in vacuum line...…...ganna test with fuel gauge...…will report back
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put fuel gauge on Schrader valve on fuel rail and got noooo pressure???????....is it possible that a brand new fuel pump went bad???ganna check fuses and listen for pump noise in tank....this is maddening any thought would be appreciated
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ok guys let me have it...……..trucks run great when they have gas in them.....smh……..in my defense I put a brand new sending unit in gas tank and it showed that truck had fuel...…..learned a lesson here
n
n
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Joined: Aug 2010
Posts: 21,253
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From: Reynoldsburg, Ohio
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Powerkleen
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