No throttle response

inthezone · #1 10-10-2009, 11:28 PM

4.6 l 97 changed fuel filter, tps, dpfe, ects,plugs wires all oem parts engine ,runs great smooth idle revs fine but no acceleration in fwd or reverse, lack of torque no codes set checked with scanner and nothin really stumped here any help appreciated.. thx

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f150fella08 · #2 10-11-2009, 12:30 AM

it the transmission full of fluid, and is the transmission filter loose, i know my buddy had a s10 that did this and we took the pan down to look at the transmission to see if there were parts laying everywhere, and the filter was just loose went ahead and changed it while it was apart, ran fine

Matts ford · #3 10-11-2009, 01:02 AM

has the maf ever been cleaned? what kind of air filter are you running? was it doing this before you changed everything?

inthezone · #4 10-11-2009, 01:13 PM

Quote:

Originally Posted by Matts ford

has the maf ever been cleaned? what kind of air filter are you running? was it doing this before you changed everything?

maf has been cleaned and checks out, trans fluid good clean not burnt, and yes it was doing it before I changed parts.
had electrical short last time out on the trail could the pcm be faulty it self ?
Have rebooted it
factory aircleaner

inthezone · #5 10-11-2009, 02:54 PM

up date freeze frame data as follows

Fuel sys 1 Online
Fuel sys 2 CL-fault
calc Load % 39.61
ect F 185
stft b1% 19.53
ltft b1% 0.00
stft b2% 19.53
ltft b2 % 0.00
eng rpm 1106
veh speed mph 0

codes present p0161 o2 heater circuit
(bank2 sensor2)

any help would be appreciated thx

bmxrider5x · #6 10-11-2009, 08:14 PM

left bank is adding a lot of fuel there its running lean umm, the o2 wouldnt affect fuel trim thats only cat efficiency... so check for any exhaust leaks before the upstream o2 and check for vacuum leaks(that would cause both banks to run lean). my guess is the negative exhaust pulses is drawing in air and then the o2 is reading more air so its adding fuel......

edit- sry didnt read ur fuel trims right are u sure ur stfts are 19% that cause ur ltfts to increase because ur stft need to see the upstream o2's switching now scratch what i said and look into vacuum leaks

inthezone · #7 10-12-2009, 07:04 AM

fuel presure regulator seems to be bad 13psi at idle pinched feul return line spiked to 56psi will replace and confirm