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9 Posts
Have a strange one here.. Car, 1995 wagon Lt1, was running fine before this.. A/C compressor went out, installed new compressor and hoses and all related needs, replaced all hoses since I was in there, changed thermostat, and belts. Put everything together, changed spark plugs (NGK) filled it up with water/AF started it, ran fine, no leaks, bled the little air valve on the thermostat housing a few times. Have not plugged in the AC compressor yet. (still need to evacuate it.. etc). Car, has 5.7 with heavy duty cooling, 1 mech fan and 1 elec fan plus various other towing package items. Problem is, as long as you are driving it, all is normal. As soon as you let it idle for a minute or so, the engine kind of stumbles and the elec fan comes on and the check eng light comes on.. If you drive it for a few seconds, the light goes out and the fan turns off, or you can just kill it and start it and all is fine for about a minute and it does it again.. Temp gauge never shows over halfway, as it always has and hoses never shows over 150 or so with a thermal gun.. Smog pump fuse is good. Thermostat seems to be working right also.. Irks me that GM engineers made it near impossible to pull the error codes (paper clip trick does not work on this model) Normal OBD-1 do ot work on it either . Dealer said they would pull the code for $150, and before you say it, Autozone nor O'Reilly's can do it. '94, '95 5.7 are some special sort of bird. Any help will be appreciated...