Could messed up egr or bad vla cause a misfire?

[simpreza2]

I am getting a cyl 4 misfire and I dont know whats causing it. I am also have a egr cel and my vla(s) is/are tapping. Could the bad vla make the engine misfire?

 

I think the egr is messing with my acceleration b/c when I statrt off in 1st gear sometimes it takes off quick and sometimes is a little slow untill about 3k but would this cause a misfire?

 

So far I replaced the plugs, wires, and coilpack(swaped from know unit in good working condition) Any Ideas?

 

Thanks

Jon

[Tiny Clark]

I doubt your EGR valve is messing up too much. It allows the pressure and nasty gaseous crap in the crankcase to be sucked out by the vacuum from the intake. The check ball prevents any backfire from getting back into the crankcase.

[Tiny Clark]

There I go again, posting while drinking fermented grape beverages. I don't know how I confused the EGR with the PCV valve.

 

I don't know about engine misfire with a bad EGR, but the car could run like crap if the EGR is remaining open.

 

Thanks Frag!

[simpreza2]

I don't know about engine misfire with a bad EGR, but the car could run like crap if the EGR is remaining open.

 

Yeah I didnt think it would cause a misfire. I know you can make a car almost stall by pushing it in when its idling. I guess if it gets stuck it can make my acceleration crappy.

 

Im going to replace the vla in 2 weeks when I get home. I doubt thats causing the misfire but it will be one less thing I have to fix/woory about.