Hi All & Thank You in advance for any suggestions you might have.
I have a 94 GT w/ a 5.0. Car has almost 168K on it. I'm having trouble trying to figure out why my Temp Guage goes up a little past 3/4 of the way & my check engine
light comes on intermittently. I thought I had a Cooling issue so I put in all Brand New Parts...All Aluminum 3 core radiator, Water Pump, T-Stat, Radiator & Heater Hoses. Did Not Help! My Oil & Coolant look normal...No milky residue. No bubbles in the Radiator. Plugs all look fine. No Sweet odor & No Leaks anywhere. I live in AZ. so it gets pretty hot in the afternoon (usually 100-110) & that's when my Temp & check engine problems happen. Car runs like a Champ in the mornings when it's cool outside. Once it gets up around 105 my Temp guage goes up to 3/4 or more, the car starts running rough & the check engine light will go on & off intermittently but wont stay lit. I'm not even sure the Check Engine light is caused by the same problem.
Any ideas Anyone??? I'm lost on this & have no idea what to try next. Is it possible the Stock Fan isn't doing the Trick? I put the same kind of radiator in my 04 V6 3.8 w/ the stock fan & had no issues at all. Could there be like a bad/faulty Temp Sensor somewhere? Thanks Again for any input.