i posted this in one of the other forums already but it (I) doesn't seem to have received the attention (help) i hoped for. so here it goes.

02 dodge dakota
3.9L SXT

idle is good during open loop.
after it goes into closed loop, about a 1 1/2mi down the road, its starts misfiring and sometimes stalls out. after about a minute or so it clears up and everything returns to "normal"
i've had fault codes 300, 301, 303, 172
replaced coil, wires, dist cap, rotor cap, plugs, coolant temp sensor, and this past weekend the intake manifold gaskets, plenum and throttle body gasket.
the dealership said my fuel pressure was good, and my compression all the way around was 180+.
this morning i had P0175

i am lost now and without having an analyzer i don't know what to do now.

any suggestions would be appreciated.

 

Check out your MAP sensor...or your oxygen sensors. I have a feeling one of them is screwing your fuel trim up.

 

i checked my map voltages and it seems it may be the culprite.

i have 5.2V supplied which may be a little high but not high enough.
after plugging it back in and checking pin 2 to ground it stays around 1.5V at idle...good
while reving the engine it still tries to hold on to the 1.5V but starts to decrease as RPM's go up.

i guess after a trip to the auto parts store we'll know more.

thanks for your help burnin rom.

 

update

i went back out to check the voltages again. what i didn't do last time was put it in drive (with the brake on of course) and check the voltage. every thing seems fine with it now. voltage goes increases with the revs fairly smoothly. it could be the o2 sensors but i just have a hard time accepting it since i've had P0172 and P0175. i can have 'em checked out but its just odd.