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help! cant figure out problem with car

627 Views 4 Replies 3 Participants Last post by  89coupe
My car is not running right, it started about a month ago out of no where, it has a screwed up idle, (it bounces back n forth between 800 n 1100 rpm), it has a hiccup at steady throttle, almost like i let the throttle on and off, its mainly at part throttle it doesnt seem to do it at WOT,and with the mass air computer in when i start it for the first time in the day it revs to 2000 rpm then dies. I did the mass air conversion on an 87. It ran good for a month or two after i did it. I put the speed density system back in to see if it was a problem with the mass air but theres no change. Also it lost some power, it has new plugs, wires, cap, rotor, ignition module, tps, and it doesnt appear to have a vacuum leak. Any ideas what it could be?
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Pull the Codes.....
Yes it can still have codes. Not all OBD-1 codes will flash a CEL
im gonna try to work on it this week and retard the timing, ive never cleaned the iac so im gonna try that too. my check engine light isnt on, will it still give trouble codes?
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