Ok so here's the deal I have an obd1 aba block in my mark 2 running obd2 . I am getting no codes , but I am getting a chugging just about 1000 rmps about 1150 to 1300 , know when I moved to Colorado I re timed the car and its been running great all of a sudden last night this started , thought it might be bad gas so I tossed in some HEET and bought different gas. It still happening , when I got here the car bogged down right off the line , this isn't like that . I'm checking timing tomorrow but does anyone else think they may know the issue?
Ps only does it when in gear.