I hate to rehash what's been said on another forum, but I'm not getting much input over there.

This started out with a P0170/P0173 CEL. I changed the MAF, but no luck. Recently, the truck has been sporadically running bad (loss of power, shuddering). Code check revealed the same two codes, accompanied by P0300, P0305, P0306, P0307 and P0308. I found it strange that all these codes were on one side of the engine; however, I replaced the plugs and wires.

I had a tech look at the truck when I had all the codes popping and he recommended plugs, wires and a throttle actuator. He said my MAF appears to be fine.

Since then, I have the P0170 and P0173 codes. I purchased an Actron CP9180 Autoscanner and checked the live data. This is what I got:

These values were taken after the codes had been cleared.

Here's a printout of my values at idle, upon startup:

MIL STATUS OFF
ABSLT TPS % 2.7
ENG SPEED RPM 651
CALC LOAD % 20.3
MAF FLOW g/Sec 5.55
MAP KPA 29
COOLANT �F 208
IAT �F 165
IGN ADVANCE � -13.6
SECOND AIR ATMOS
ST FTRM1 % -1.0
LT FTRM1 % 16.4
ST FTRM2 % -2.2
LT FTRM2 % 17.1
VEH SPEED MPH 0
FUEL SYS 1 CLSD
FUEL SYS 2 CLSD
O2S11 V 0.785
ST FTRM11 % -2.2
O2S12 V 0.780
O2S21 V 0.100
ST FTRM21 % -2.2
O2S22 V 0.065

This is a record of the values after approximately one minute at idle:

MIL STATUS OFF
ABSLT TPS % 2.3
ENG SPEED RPM 659
CALC LOAD % 20.0
MAF FLOW g/Sec 5.41
MAP KPA 29
COOLANT �F 208
IAT �F 167
IGN ADVANCE � -13.6
SECOND AIR ATMOS
ST FTRM1 % 0.7
LT FTRM1 % 16.4
ST FTRM2 % -4.6
LT FTRM2 % 17.1
VEH SPEED MPH 0
FUEL SYS 1 CLSD
FUEL SYS 2 CLSD
O2S11 V 0.155
ST FTRM11 % 0.7
O2S12 V 0.755
O2S21 V 0.210
ST FTRM21 % -1.0
O2S22 V 0.070

I took the truck for a drive (approximately 1/2 hour) and she threw the CEL again, upon startup. Here is a read out of the freeze frame event:

Frame 1 Mod $01
TROUB CODE P0173
ENG SPEED RPM 650
CALC LOAD % 26.6
MAP KPA 36
COOLANT �F 195
ST FTRM1 % -11.8
LT FTRM1 % 16.4
ST FTRM2 % -13.3
LT FTRM2 % 17.1
VEH SPEED MPH 0
FUEL SYS 1 CLSD
FUEL SYS 2 CLS

Can anyone point me in the right direction?

BTW: After resetting the codes, the truck drives fine, sometimes for a day or so, before the P0173/P0170 return. If it was the MAF, wouldn't the problem raise its ugly head almost immediately? Could this symptom be indicative of a fuel pump/regulator/filter problem?