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electronic egr valves primarily gm viehicals .employ a egr valve that is not operated by vacume at all .an electronic solenoid in the valve is operated electricaly by the ecm .diagnosting this type if egr valve require a special scan tool . sorry your probley off to the dealer pal.
I believe it is on the pass side of the head.(EGR) exhaust gas recirculator .it alows the engine to re burn left over fuel in the exhaust.unfortunately the pasage way gets cloged with carbon buildup causing egr failure.this is very hard to clean and should not be done by a novice DIY. some times SEAFOAM will clear it out if it is not compleatly cloged it is worth a try.
I have a 1998 Chevy Cavalier with a 2.2 engine & automatic trans. The car shifts great thru all gears, but when u stomp on the gas, it revs up as it's in neautral. If anybody has advice, please text Shaun @ 423-833-9669. Thx!
In the top picture you can see egr adapter, three bolts, the egr valve mounts to adapter. Hope the picture gives you some orientation? You can see the 5 wire connector and wire colors. The bottom picture should be the egr valve.
sounds like the IAT is disconnected, it is either in the flex hose from the air cleaner to the engine or in the air filter housing, on my GM product car it is in the air intake hose, it is small and has a 2 wire connector to it, just pushes and pulls in and out of the flexible air intake hose.
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.
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