Distributor is back in is misfiring throwing codes p0102, p0305. Have tried everything. Any advice!!!!! Thanks

 

p0102 MAF low air input. Either bad MAF or split in intake plenum, vacuum leak, or any other way air can enter the engine AFTER the MAF.

p0305 misfire on cyl 5, could be casued by the first code. If not its something local to cyl 5, spark plug, wire, cap rotor. If those check out then maybe the injector/poppet valve is having issues, maybe compression loss

 

My suggestion is to check over all of your work, specifically that all of the connections are on the intake duct-work. In that regard, the crankcase clean air return tube is the one most commonly forgotten when reconnecting the intake duct. It runs from the passenger side valve cover up to the back of the intake hat that sits on top of the throttle body. Make sure that is connected as that little tube being off can cause the P0102 code to display.

Deal with the P0102 code first and see if that doesn't solve the P0305 code.

 

I have check all work.everything appears to be in place where it should be. plug wires in right place. did spark test on number 5 has spark.I have sprayed carb cleaner to check for air leaks and vacuum leaks.None present. Disconnected harness from maf sensor. terminal B has 0 ohms of resistance. terminal A and B together I am getting 5 volts. Terminals B and C i am getting about 11.4 volts.Just had plenum off to replace spider assembly had no visible cracks and no change in vehicle after assembly. maf has been cleaned.when disconnecting the maf while truck is running no change in idle.I am not sure where to go from here.

 

no you do not have to realign the timing marks when u turn the dizzy one tooth at a time. one thing you will have to do is take the fan off, get a wrench. move the dizzy one tooth and if it doesnt drop all the way in turn the crankshaft pulley (under the fan) clockwise. till it drops all the way down.

 

p0300 is random misfire. non cylinder specific
p0301 - p0306 is specific cylinder, 1 through 6 respectively

 

dont forget that on the dizzy cap the spark wires are in a specific order.
d is dizzy cap
c is cylinder
drivers side is right passenger is left
c pack plug is all the way in back passenger side

6 d 5
4 d 1
2 d 3
wires going to
6 c 5
4 c 3
2 c 1