Can anyone help?? My blazer has a problem...starts fine runs really good, my problem is when i put it in drive and press the gas pedal.it statrs off fine soon as it hits 2000 rpms it drops down to around 500 doesnt die, just dips down. Once it passes 2000 rpms it runs like a champ. Until i have to stop...lol...my firzt guess is the camshaft position sensor..am i wrong to thing thats the gremlin in my blazer...please help..