Hello! I got a blazer s-10 from-92 4.3L V6 and I´m having some trouble with it.. When the car starts it´s running in 2000 rpm and it´s no different if the engine is hot or cold.. When I put it in drive or reverse and hold the break she dies and if I´m not holding the break she makes a jump and die or if I give her some throttle she moves and run perfektly as long as she runs over 2000 rpm which is about 95 km/h in the highest gear. when I break her she starts to missfire and when I push the throttle to get her over 2000 rpm the exhausts turn black until she hits 2000 rpm and runs perfektly.. I´ve put in a new map sensor, new plugs and cabels, new rotor and disturburator cap, new ignition coil, new egr solenoid, new tps sensor, new IAC unit and a new controll box( the flat one on the firewall whit four contact pins and I´ve also checked all the vacum hoses.. Anybody? please help.. My next step until hopefully someone can tell me whats wrong with her is to replace the egr and the lambda sond and try whit a new stearing box(the one on the right side under the panel, I call it a computer box but I´m not sure of the proper word for it..) hopefully some of you out there have a solution for me..

 

check your reference volts to your IAC & TPS...gotta be between 4.5-5v...if not ECM is bad and can't regulate a thing.....