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Sorry I dont have a pic. for you. But here are instructions. The EGR valve is located at the top right of the engine next to the throttle body. REMOVAL & INSTALLATION Except Linear EGR Valve
Disconnect the negative battery cable. Remove the air cleaner assembly from the engine. If equipped, unplug the valve electrical connection. Remove the EGR valve vacuum tube from the valve. Remove the EGR bolts and/or nuts and remove the EGR valve and gasket. To install: Install a new gasket to the EGR valve and install the EGR valve to the manifold. Install the nuts and/or bolts. Tighten the bolts to 17 ft. lbs. (24 Nm) and the nuts to 15 ft. lbs. (20 Nm). Connect the vacuum tube to the EGR valve. If equipped, attach the valve electrical connection. Install the air cleaner and connect the negative battery cable. Linear EGR Valve Disconnect the negative battery cable. Note the position of the EGR valve prior to removal. Do not rotate the valve 180?. Unplug the valve electrical connection.. Unfasten the valve retainers, then remove the valve and the gasket.
To install: Clean all gasket residue from the gasket mating surfaces. Install a new gasket and the valve. Install the valve retainers. On 1994-97 2.2L engines and 1994-95 4.3L engines, tighten the valve retainers to 17 ft. lbs. (24 Nm). On 1998-99 2.2L models, tighten the retainers to 19 ft. lbs. (26 Nm). On 1996-99 4.3L models, tighten the retainers on the first pass to 89 inch lbs. (10 Nm) and on the final pass to 18 ft. lbs. (25 Nm). Attach the valve electrical connections and connect the negative battery cable.
In order I would go for the EGR valve, then the TPS. A malfunctioning EGR will keep the car from starting and make it run very rough if you do get it started. The car will run without the knock sensors so I would wait until it runs better before getting those. There are two knock sensors one for each bank of cylinders on the V6. Autozone should be able to tell you which sensor goes on which side.
Fig. 11: EGR valve and component mounting-3.0L engine
Fig. 12: EGR valve and component mounting-3.8L engine
Disconnect the negative battery cable.
If necessary, remove the air inlet tube from the throttle body and air cleaner housing.
Label and detach all vacuum hoses from the EGR valve.
Label and detach any electrical wiring harness connectors from the EGR valve.
Disconnect the EGR valve-to-exhaust manifold tube from the EGR valve.
Remove the EGR valve mounting fasteners, then separate the valve from the upper intake manifold.
Remove and discard the old EGR valve gasket, and clean the gasket mating surfaces on the valve and the intake manifold.
Install the EGR valve, along with a new gasket, on the upper
intake manifold, then install and tighten the mounting bolts to 15-22
ft. lbs. (20-30 Nm) on 3.8L engines, or to 106-159 inch lbs. (12-18 Nm)
on 5.0L engines.
Connect the EGR valve-to-exhaust manifold tube to the valve, then tighten the tube nut to 30 ft. lbs. (41 Nm).
Connect all wiring or hoses to the EGR valve.
Install the air inlet tube.
Connect the negative battery cable.
Hope this helps (remember comment and rated this).
You could have a dirty EGR valve, you can re move it from the manifold and clean it with Throttle body cleaner. Might as well buy two cans, since your cleaning the EGR, might as well clean out the throttle body too.
Spray the throttle body cleaner in to the throttle body with the engine running and try to keep it at 1000 rpm and then to 1500 rpm as you clean out the throttle body and let it idle down for 2 min then turn the engine off. Then turn the engine to the run position for 10 seconds and start and let idle, ro for a test drive and hope that solved the problem, if not there a few more things we can do which will consist for tune up.
Note: Clean the EGR first so you don't burn your self since the engine would still be cool before you clean the Throttle body.
Good luck and keep me posted.
How is it running before it quits onyou. This could be the culprit of an egr valve. How many miles on thevehicle. The egr seems to die on a certain mileage pattern. Also youcould start by cleaning the egr valve before replacing it. This couldvery well help the situation, but this is just a guess. Hope thishelps!!
Here is a picture of the egr valve for your blazer. http://www2.partstrain.com/store/?Ntt=EGR%20Valve&N=9968%201588%204294967265
Quite pricey. As for changing it out I would head to your local library and seek out their online car repair sources. Be sure to take a jump drive or a floppy disk to take the documents back home with you. From your home print out the proper techniques as well as torque specs for the removal and replacement of the egr valve. Good luck.