OK don't take this the wrong way but you should have placed this in the emisions section under TUNING / SMOG
If you are having problems with the stock valve there is 2 ways to go about fixing it if you "can't" find the part. 1: Pull the thing off and remove it compleatly. 2: If you live in a place that requires you to SMOG it then go down to napa and pick up one of the check valves like the one below. THERE IS OTHER SIZES AVAILABLE, MESURE YOUR HOSE. Place it in the hose between the air cleaner and the broken check valve. This is all the first gens have. No big ugley valve with vacume lines. They also have ones that will screw right on the air pipe. Why they went to the one with the vacume controles I'll never know. It's probaly because they could control the air flow better. Now if you have an O2 sensor that controles the FI or the carberator then it might cause a problem or not I DONT KNOW, but it is worth a try just to pass smog. But it will keep the exhuast gas from flowing back up to the air cleaner.
Exhaust Air Check Valve
Product Line: Echlin Fuel System
Part Number: CRB 229013
Price: Price
Unit
:
:
24.99
Each
Features & Benefits NAPA Echlin Products Meet Or Exceed Original Equipment Specifications. All Products Are Top-Of-The-Line Quality, & 100% Tested & Inspected In An Environment That Is IS09000 Compliant.
Warranty Limited 12 Months
Warranty PDF
Attributes Exhaust Air Check Valve Hose Size : 5/8"
Exhaust Air Check Valve Length : 3"
Material Safety Data Sheet There is no MSDS for this item
Exhaust Air Check Valve
Product Line: Echlin Fuel System
Part Number: CRB 229282
Price: Price
Unit
:
:
32.49
Each
Features & Benefits NAPA Echlin Products Meet Or Exceed Original Equipment Specifications. All Products Are Top-Of-The-Line Quality, & 100% Tested & Inspected In An Environment That Is IS09000 Compliant.
Warranty Limited 12 Months
Warranty PDF
Attributes Exhaust Air Check Valve Hose Size : 3/4"
Exhaust Air Check Valve Length : 3"
Exhaust Air Check Valve Thread Size : 3/4" - 14
Material Safety Data Sheet There is no MSDS for this item