95 astro 4.3 missing after warming up

[ket1995]

I just bought a 95 astro that I did tune up on, when it is cold it runs does not have the bad miss as it gets after about 5-6 miles then it developes a miss, and it almost seems like it shifts when the miss starts.. i replaced plugs, wires, and coil. fuel filter, it also had a leak on fuel return line fitting. I had this for only 2 wks and only have been able to put maybe 50 mile.. took it to a shop and they are telling me no fault codes.. but I'm not usre they even have a scanner to read codes I'm ready to start replaceing every sensor on it

[ket1995]

I forgot I have also replaced egr valve, distributor cap and rotor. van has 175k on motor and has had regular maintenance done,did not replace ingintion module because I was told they either work or dont work with no inbetween

[ket1995]

missing on 1,3 5 total right bank, found pressure regulator bad, and guy who is doing work actually had some that he bought a few years ago so did not have to replace whole injector set up.. it was flooding out the whole right bank,, still missing but will replace plugs or clean them and try again.. getting close to having it solved. fuel PSI right at 60, cyl. comp. is at 140 all cyl. any input could be helpful

[Jose]

I had the same problem replaced the spyder injector and problem went away but befor you do this check the injector wires as your van starts to miss jiggle the two wire injector connector its a blak connector that comes off the major wire harness on the left side of engine the connector is right by the map sensor the wires are blue and red after the connector the wires go into the manifold and hook up to the top of the injector if by jiggling the wire the engine stops missing or starts missing take the black connector apart and on the female part of the connector use a sharp pick and tighten up the female connector so when you put the male probe part back into the connector it will be tight let me know if this works, if it does not its your spyer injector I hope this helps post if this works for you good luck