running rough!!

[Rootie524]

I'll probably add that catch can then at some point.

couple new things. the head gaskets both seemed fine. pistons looked good as well as what i could see of the rings. the heads i removed look ok. the valve seals were questionable so it's good I'll have new ones. Some valves also barely had any suction when removed with my finger over the seal. So that might be screwing stuff up as well. Also my spark plugs (autolite app) have a little white plastic piece where the spark is. on 5 of the plugs, it was white. on cyl 4, it was brown. and that's the cylinder the pcm is telling me i have an issue with.

furthermore, when i lifted the valve stem seal off the 4th cyl exhaust guide oil came out and the exhuast port for the same cyl was alittle went while the other were bone dry.

i still have yet to take apart the lifters so im still following the theory that maybe one is collapsed. but so far i don't see anything too out of the ordinary. so im thinking it's possible an injectors was the issue. but ill have cleaned valves, new heads, new seals, new gaskets, so it should definitely fix the problem even if i dont see it.

things i need help on:
I'm going to lap the valves. all i have to do is put the valve lapping compound on the valve and seat it and spin it around for awhile then wipe it off right? how long should i spin it on the seat?

also when i install the valves should they go in the guides dry or should i put alittle oil on them?

my heads were resurfaced and had 0.10 taken off...i can use stock head gaskets without valves slapping pistons, right?

and alittle coolant got in my cylinders. i soaked all of it up but im guessing some is still there. how bad is that? if i fun the car maybe 20 miles with some seafoam in the crankcase and change the oil will i be fine?

[86FieroSEv6]

Oh wow, man. Where do I start with how this can all go wrong. First, there is a fitment spec. for the valve stems in their valve guides. Too much play here and there isn't a seal on the planet that will stop it from sucking oil. Next, the valve seat to valve face contact is crucial. Normal valve seat width averages 1mm or so and must be in the correct place on the valve face which leads to . . . valve head protusion. Too high a seat with too much protrusion will promote burning of the valve itself. Too low a contact with the valve receded into it's pocket will affect port flow and velocity and promote carbon buildup. So, step one at this point is to check the "wobble" or valve stem to valve guide fit.

[Rootie524]

well i can tell you right now i had valves that i cleaned that came from some set of heads (i dont even remember anymore i have so many) and they some were giving issues going in the guides..pretty tight..so i didnt force them in or anything..the went alittle and i just decided..ok these must not go in here. i originally thought they might have bent stems..but you telling me what you just did changes everything.

[86FieroSEv6]

Fear not, intrepid automobile owner. You can still do this, it's just that valve work entails a long and inconvenient list of details for success. The best thing you could do is to find a pro and ask if you can watch him set and seat a valve all the way from stem checking to the final undercut. It will help prevent much heartache.

[Rootie524]

ok false alarm! i just had two valves that were indeed bent ever so slightly..good thing i have like a ton a valves. so now i have all the valves snug in their guides with very little play. i thought i was gonna need to get my guides bored or replaced. *wipes nervous sweat off forehead*

now I'm assuming the next step is lapping the valves.

[86FieroSEv6]

Do you have any Prussian Blue marking fluid? If not, you can use a magic marker to coat the valve face, then rotate your valve on the seat, pull it out and look at the face to check the initial contact. Pictures would help.

[Rootie524]

just two quick questions so i know.

--my heads were milled .010..do i need a different spark plug gap and are my stock head gaskets fine?

--I'm going to take apart the lifters. when i put them back in, do i want them to be completely oil free/clean/dry, or do i want to soak them in oil before i put them back in?

[SappySE107]

Nothing changes for spark gap and your head gaskets are fine other than needing new ones. Clean them and get most of the oil out of them. Soaking does nothing and you don't want them full of oil. Assembly lube on the roller part and body wouldn't hurt but that's really about it.

[Rootie524]

alright sweet.

one last question. i still think one of my injectors might be messed up so while i have it all out i wanted to replace them. i forget if we decided if i could use my 19# injectors that i have to replace the 22.5# injectors and not have a problem. i dont want to put extra strain on the pump or anything. but is it just an easy swap or wouldnt it work

[Rootie524]

in addition to my last question please try to help me out with this as well.

after taking the lifters apart i found that one spring was shorter than all the other ones..is this a collapsed lifter spring? or is it fine. keep in mind all the other springs are relatively the exact same height. just this one thats short.

[86FieroSEv6]

We call that a "donefer" cause it's done for good. Never let the obvious fool you. Yes, it is in fact a bogus check spring.

[Rootie524]

ok i replaced the lifter spring..luckily i had some spare TCE lifter springs floating around.

now it's all pretty much put back together, now i just need to decide keep the fuel injectors which may have been the issue this whole time and ill have the problem again and have to replaced them later. or switch to the 19# injectors i have. but i still dont know if i can use 19# injectors on my car and not have any problems/bad fuel economy.

[robertisaar]

the injectors will be fine... the electrical connectors are different, but using the 23.5lb/hr injectors at 43.5PSI will roughly be 19 lb/hr, while the 19lb/hr at 55PSI will roughly be 23.5lb/hr...

[SappySE107]

19# at 43.5 psi is 21.3# at 55 psi.

[robertisaar]

my math, she sucked last night...

http://wiki.60degreev6.com/index.php/Fuel_injector_ratings

stockers should be 22.5 when at 55PSI, so "overdriving" the 19lb/hr should be at least close...