bucking getting more noticeable/more common/worse
==cold idle cammy/surgy sometimes. warm idle almost always smooth but sometimes cammy.
==not bucking cold.
==warm weather bucking once needle hits bracketed area.
==cold weather bucking a while after hits bracketed area, def by mid range.
==bucking when overdrive kicks in, also when overdrive selected to off.
==bucking between 45 and 60. 1100-2000 rpm. seems to correlate with lock up on low end (even if OD
selected off. lock up in 3rd?) goes away at 60mph and higher.
==doesnt do it in that speed range if foot off throttle or very little throtle/light load, also pushing pedal a little deeper/moderate accelerating thru that speed range will end bucking until you go back to light throttle.
==oil level fine, tps
is 6m old and it doesnt do anything weird when goosed in park
== no codes, hutch mod done a few months ago.
Some info from last week—-
I instaled my new purple motorcraft CPS
this afternoon. Drove about 20 miles. Still same symptoms.
Figured out how to get the parameters you mentioned using my Torque app and the OBD
I don't know very much about them or what they mean but here is what I saw driving to/from kids karate at 45mph with and without cruise control (still bucks with cruise on) with a few good acceleration runs and downshifts.....
- rose continuously from cold start to ~185F 5-7 miles later.
Boost - usually pretty low, like single digits, but peaked at ~17psi
- ~10% at idle peaked at 51, i think it hung out in teens and twenties most of time.
ICP/HPOP - 550psi cold idle, warmed up a bit, peaked 2800 held ~2400-2600 during my redline accel runs up to ~80mph. 450-475-500 variable hot idle when got home.
- 0-25% for most of drive. 0 when cruise on. It shows full range via OBD
when pedal pushed.
- usually 2400-3200(us) idle, peaked at 4400. Seems to bounce around a lot without reason.
- 15.3 idle, peaked at 45psi.
Some info from 2 days ago—-
Not sure how to check fuel pressure but pump Duty cycle is 100%
I checked the tin nut and it’s tight. The valve cover connector on driver side is really stiff but firmly clipped and shows no sign of melting or cracked or arcing I can see.
I have more numbers for you....
While driving cold and warming up.
idle 2400 2200 2500 2400 2600 2400 2500 2300 2700 2400 2300 spikes at 4400 when lugging accel
idlecold 500 580 520 530 494 514 585 570 510 494 hot 450-500
cold idle 10.44% 10.8 steady 10 hot
Mass fuel 8.75 7.5 7.3 8.1 7.7 8.7 7.5 8.6 7.2
Fuel pump duty 100%
While driving warmed up at 45-50mph pretty steady...
Torque converter slip.
4.9 16 26 16 10 26 16 bounces a lot
670 780 800 700 bounces a lot
13.9 14.7 bounces a little
2800us 3000 2900 3200 but anytime I dipped into throttle for a slight hill or to speed up a little it would hit 3800-4000. Also hit 3800-4000 when lugging engine around 45.
Seems to do it after tc
locks, when pw
is higher. Also can get it to happen if I accelerate and it doesn’t miss but then let off throttle a little to keep speed.
Assuming sensors are good, Is it a tc
issue, an injector issue, a fuel pressure regulator issue, or a fuel pump issue?
Any ideas or input?
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