Ok, my 87 quest that is all stock. It's been sitting inside for 10 years untouched. I've replaced the fuel tank, water pump, radiator and rebuilt the turbo and throttle body with new injectors. also replaced all the vacume lines and coolant lines. The motor was supposedly rebuilt just before storing. I've verified good compression and fuel pressure. But this thing runs like crap, spits and sputters can't get over 20mph. Help! I bypassed the coolant line going to the throttle body, my theory was trying to keep the heat out of there. Was that wrong? I had two codes, o2 sensor and TPS. I've installed a new 02 and a different TPS. haven't checked codes since, but it's running the same. I picked up an 88 quest this weekend with a cracked head, so I'm in the process of using it for trouble shooting parts, robbing peter to pay paul. any help would be appreciated guys.