heads, 11.0:1 compression, Sealed-Power pistons w/gapless rings, Mallory CD ignition, 30 lb Accel injectors, Edelbrock headers, Bosch external fuel pump, 36 lb Centerforce flywheel, 1993 T-56 6-speed,Hurst shifter and stock 3:73 Posi. IMPORTANT: Be careful and take all necessary safety precautions while working around a running engine. 1987 Monte Carlo SS, 78 406, Speed Density TPI, Herbert Hyd Roller Cam, Trick-Flow 'Twisted Wedge' 1st gen alum. So, the first thing we'll do is to make sure that vacuum is not being applied to the EGR valve when the engine is just idling. The other port connects to the EGR valve and should only have vacuum when the PCM commands the solenoid to activate. One is a vent port (that vents vacuum to the atmosphere) when the engine is idling. The other side of the EGR vacuum solenoid has 2 ports. In case you're wondering, the letter J is embossed above the vacuum port on the throttle body. Theres no point in keeping it since the OBDI ALDL is being removed/made inop and the OBDII ALDL has no provision for direct fuel pump control. One side of the EGR vacuum solenoid (the one that has only one vacuum inlet port) connects to the vacuum port labeled with the letter J on the throttle body. The fuel pump wire that goes through the C207 is for the ALDL bypass and is generally cut out in the prep. The fuel injection computer is the one that regulates the opening and closing of the EGR valve thru' the application and release of vacuum (through a vacuum solenoid). If it doesn't fit, they'll find you the right one. Will the above EGR valve fit your particular GM pickup? Don't worry, once you get to the site they'll make sure it fits (by asking you the specifics of your particular vehicle). The following links will help you comparison shop for the AC Delco and after market EGR valves: If you're wanting the buy the original AC Delco (Delphi) EGR valve, you can buy it online for a whole lot cheaper than somewhere local. You can find the EGR valve in any auto parts store.
High-lift jack location Fuel cell, hi-lift, spare tire clamp. KEEP: Fuel Pump Relay ESC Module good shot of the routing of the stock 1991 chevy van speedo cable Drivers side hood open this timePS remote reservoir. dual batteries, and my 1000amp ground-side disconnect.