strangest valve problem...

I had the same issue on a brand new valve.  The stem was slightly bent due to shipping, and the vavle would barely open.  Straightened it out the best I could and it worked fine. 

hmm i will check the pilot. and if needed i have another stem from a old valve. might swap that out too. will let everyone know if it helps.

i replaced everything except the lower section of the valve and the diaphragm and still doing it. i think i will swap out the diaphragm and see if that works. still stumped. i also double checked to see if anything was stuck in the valve and nothing.... so strange.

We bought a full set of SMC 3/8 valves from Suicide Doors back when we first airbaged the Envoy.  3 out of the 8 valves would stick wide open if you hit the switch.  They were brand new.  SMC VALVES ARE JUNK!!!!  And on top of that Suicide doors would not replace them unless we shipped them back and even at that they said they may not cover it.  So that was the last buisness with SMC and SD for me.

I would check for binding like has already been mentioned. Balljoints, maybe control arm bushings. Is it shocked in the front?

 

---------------------------------------------Originally posted by ahabWe bought a full set of SMC 3/8 valves from Suicide Doors back when we first airbaged the Envoy.  3 out of the 8 valves would stick wide open if you hit the switch.  They were brand new.  SMC VALVES ARE JUNK!!!!  And on top of that Suicide doors would not replace them unless we shipped them back and even at that they said they may not cover it.  So that was the last buisness with SMC and SD for me.---------------------------------------------

i agree fu*k smc

Ive had my SMC 3/8 for just about 8 years now, ive only had to replace one. im about to replace them all only because they are old but ive had a good experiance with them

have you tried switching it with another valve in your system to see if the problem follows; like maybe a fill?  that would eliminate your question about contaminants...

---------------------------------------------Originally posted by corey0814have you tried switching it with another valve in your system to see if the problem follows; like maybe a fill?  that would eliminate your question about contaminants...---------------------------------------------this would also be a good way to make sure binding isnt the issue too