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The PCV valve on a 1999 Astro should be located on top of the valve cover. It plugs in and can be easily replaced.
valve guides or valve guide seals or piston rings. in colder weather?
inlet valve not been opend and excessive air in recovery tank
First thing to check is the pcv valve.
inlet valve not been opend and excessive air in recovery tank
inlet valve not been opend and excessive air in recovery tank
In the middle of the drivers side valve cover.
Is anyone on line to help me with this question? Where is the fast idle thermal valve in a 1997 Chevy astro van located?
The 1997 Chevrolet Astro EGR valve is located on the top of the engine valve cover. The EGR valve can be access from under the hood. You will not need to remove any engine cover.
you remove the dog house and it will be on the left valve cover
excessive exhaust back pressure, possibly a failed catalytic converter
Excessive pressure in the compressor, after the first stage (or how ever many stages there are). Excessive pressure could be caused by shut/ blocked discharge valve. There will also be a relief valve fitted to the intercooler, should one of the tubes burst. This would let air into the water side and suddenly increase the pressure in the intercooler, so a relief valve is fitted.