Hello, i've been researching this for months and still have never come to a proper solution and closure to this particular problem.

p0301 -- cyl 1
p0302 -- cyl 2
p1300 -- random misfire
p1399 -- any cyl misfire

Already checked, timing, ignition timing, cam timing, new plugs, new wires, valve adj, fuel filter

have not checked rotor or cap, i know there is someone that had these sames problems, whether it was a vacuum leak or something even simpler, bad ground whatever. if any one has any info lmk, anything would be appreciated, thanks

 

Try checking the fuel source, a weak fuel pump or restricted lines can cause misfires.

 

these will be throwing codes as well? Is there anyway to narrow down a bad fuel source before i start tearing down lines?

 

Fuel pressure tester, I'm not sure what the spec are but that's the easiest way to check for fuel problems.

 

Will check that, thanks for the input, back to top

 

***UPDATES

Was unable to do a fuel pressure test, but went ahead and did a compression test here is my results

cylinder 1 - 200
cylinder 2 - 90
cylinder 3 - 200
cylinder 4 - 200

Assuming there is nothing wrong with the valve, i'll go ahead and try a valve adj first, 110 pounds loss is a very big loss though. Will post updates and see how it goes

 

yeah try adjusting the valve first since thats the easiset thing to do first. your try doin the wet compression test to see if #2 goes up??

 

no not today i will not be doing that, letting the car cool off a couple hours before adj