on the pass valve cover on my car there is a rubber connecter that connects to a line to goes into the throttle body and when we did the valve cover there was this little metal box that had like baffles in it and it was held on the rubber connecter just by the outer ring and every time i tried puttin the vavle cover on it would fall off after bout half hour of swearing i said f- it and placed it right where it would be if it was connected in between the last set of rocker arms i put it all back together and now my car runs rough it shakes and it sounds like a 4 cylinder not to mention it feels like i have a 4 cylinder under the hood.would this little metal box have anything to do with my car runnin so shi*tly?

 

Did you plug that hose coming of the TB? If not you have one hell of a vacum leak and that would account for the weak engine.

[This message has been edited by camaroguy99 (edited September 22, 2001).]

 

no i didnt plug the hose but everybody who listens to my car says it sounds like i have a dead cylinder.i have the valve cover off and i dont think im going to be able to put the cover on and keep that breather in place would it make a really big deal if i left it out.another possiblitly might be that it might be getting hung up on one of the rocker arms too.

 

one more thing i checked the plugs they are all firing and the injecters seem to be all firing too i dont got a clue on what it could be ?

 

Plug the hole on the throttle body.

 

Ya, check the simple stuff, may have pulled and tugged on a plugwire and pulled it from either the cap or the plug(s).

 

when i plug the hose what am i lookin for to see if it runs like *** .even though i got the valve cover on with that stupid box in place but it took me a littlw while.it still runs like *** im bringin it into a garage i givin up on this car its really frustrating.

 

The hose and baffle you're referring to is part of the PCV system. The baffle is there to prevent - limit would be a better choice of words - oil from being sucked into the hose and into the engine via the throttle body. It seperates the oil from the oily mist; allowing the oil to drop back into the engine.

The system consists of several parts: the first parts (the ones you're writing about) are on the passenger side cover, baffle and hose that leads to the throttle body hose nipple: the second part of the system is on the driver's side of the engine with the PCV in the valve cover and the hose that leads to an intake manifold nipple/hose barb.

The PCV is a closed system and to work properly it must remain closed; that is to say no outside air should be allowed to enter the system except at the designed location (passenger side throttle body nipple.)

You can plug the nipple and hole in the passenger side valve cover, but this disables half the PCV system. Around town at slow speeds, everything should be fine because there will be enough vacuum in the engine to allow the PCV valve to operate properly.

Problem comes in when your foot's on the floor and engine vacuum drops to near zero at or near WOT. When that happens, the PCV valve check ball drops to the close position and, in effect, you no longer are venting the engine's crankcase pressures.

So the end result will be leaking intake manifold and/or valve cover gaskets being blown out by the pressure that has built up in the engine with no place to go.

The shaking and bad idle/performance you're expereiencing is probably do to a big-time vacuum leak at the hose nipple on the throttle body or at the valve cover grommet itself. Another possibility is that you misadjusted something which you were working on the engine.

You didnt say why you had the cover off, but if it was to adjust the lifter preload, then you probably have one or more of them too tight. You may have crossed a plug wire too.

You can use a pair of pliars and squeeze the baffle a bit to give you the clearance you need.

Two options: Find another cover or swap to push/screw on breathers and dump the PCV system entirely.

Hope this helps.

Jake

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1986 Corvette Coupe, 415 CID, Edelbrock 6073s, ZZ9, TPIS Long Tube Headers and DynoMax Super Turbos (HATE 'em)

[This message has been edited by JakeJr (edited September 22, 2001).]

 

well it didnt break off its only held on by the outer ring on the part of the nipple that is on the inside of the valve cover i finally managed to put my cover on without the box falling off.so u guys are sayin that if i plug that hose goin to the TB and my car shoudl run better?

 

i just had to change the gaskets on the valve covers my dad didnt appreciate the oil slicks in front of his house lol

 

Yes, plug the nipple on the throttle body or the hose coming off of it, your car will run much better. Even better, try to attach it to the valve cover like it was before.