po 300 code help

[Ramsey]

ttt

[Ramsey]

hmmmmmm,hmmmmm .lol

[farmtruc]

hey, none taken, just wanted to make sure that a misfire is caused by something wrong with wiring or mechanical. if the a/f ratio is off, that's because the pcm is doing so because of a sensor, the pcm will only do what's it told to. if there is a false lean condition due to a bad o2 sensor, it'll add fuel until the issue is resolved, causing a rich condition, just as example.
did you start it up at night and see if you can see any spark across the header from a wire?
if a cylinder isn't firing, it will be colder, so check that, go ahead and grab each one after it's at normal operating temperature, haha.

ya, there could be an open on the connections you made for the injector clips.
if the pcm set a P0174, that's a lean condition, caused by a bad o2 sensor or vacuum leak, or a bad maf. that would be the side to check for cold cylinders, the ltrim value on that side/bank is probably +25, so there could be an issue on that side.

it's too hard to go over all the wiring, but each wire needs to be ohm'd out to ensure connection.
but all the wiring needs to be gone over that deals with coils and injectors.
test each A side of the injector (that's the hot side) make sure power is there.
the other side, B , make sure there is connection to the pcm be ohm'n each wire.
swap your coils if you have a spare set.

that's a start, that should keep you busy, because it's a pita to do.

[Ramsey]

thanks bud gonna do it all today,haha.gonna try.ill keep u posted,thank you.

[Ramsey]

ok so far no luck ive changed maf ,plug wires,plugs.no go .i put denso platinums in and gapped them at 40.sound right?now on the inj wires.wich is a + on each ?looks like if im not mistaken the ground is the one with the black stripe on each one ,is that correct?im gonna try to stick a regular test light in each pos to make sure theyres power cus i dont have an ohm meter ,will that be ok just to check for power?this is getting costly just for a stupid code that could be so many things.

[Ramsey]

ok update lol .changed coils ,no help.lol wth.checked all inj plugs for power with test ligh and they all had power.sprayed all over the motor with cleaner and couldnt find any vaccuum leake.no plug wires glowing in the dark.im stumped.im thinking about putting the factory air box and intake tube on to see what happens.o 1 more thing how should the pvc work or how do you know if ones bad.whe i put my finger over it it sucks it in.shot in the dark but not sure how the pvc is supposed to function.if you pull it off or leave on u know.whats the deal with them cus it seemed like it ran better with my finger over it.thanks .

[Ramsey]

pcv valve for some odd reason helped it run better but no go.im about out of ideas .is there anything internal thatll cause a random multiple mis ?po300.i get 2 po300s at a time everytime it does it.wen the a/c is on and im drivin ,i can feel it like a spark plug hitting and missing.now im getting aggravated.i also put a new tps sensor and air box and intake and maf off the esky.im losing it here now.shot in the dark here but my tranny guy said if i hook up my speed sensors wrong ill throw a code ,would this be a code it would throw?idk,just sayin.