hello everyone,
new to the forum but i have had 3 mighty max's total in my life. my newest one a 1993 4g64 2wd 5speed was running great 2 weeks ago and now barely runs. if i pump the throttle after cranking i can get it to run but other than that it dies. I have a new mass air and coolant temp. those from what i read usually fixed the problem, but not in my case. it is getting fuel and the first o2 sensor was just replaced to pass smog in CA. i dont know if the trucks dont like after market parts or shat the hell is going on with this thing. please let me know what i can check or info you can offer. i am a technician but i dont have the service manual yet to help me test sensors. thanks for the help...
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