I have a 95 yj with chevy 350 78 model. Had a carb on it and it ran fine and cool, had throttle body injection on it and it ran fine and cool, put turned port on it and now it runs hot. It will start fine run fine and the temp will slowly climb untill it boils. year old water pump brand new thermostat same all aluminum summit radiator, same electric fan by the way is feeling a little weeker. never overheated with any other setup untill I put tpi on it. The only thing that is different is the top radiator hose is a little longer and goes above the block and radiator, but with the cap off and the motor running you can see water flow. Is there something I am missing on the tpi? please help

 

engines running lean, run hot.

 

yeah lean if you didnt change your fuel pump to a TPI high PSI part

 

its a walbro 60 psi fuel pump and brand new 22 lb injectors.

 

did you get a tune put into the computer?

 

no its just the stock prom with vats removed by larrys electric. and the only thing that i thought would effect it is a mild cam. but all it is a little towing cam worked with tbi great. so are you saying i need custom tuning? because if thats it i will be more than happy to sink a little more money in it to cure the problem

 

ok found out its not reverse flow and its not running lean. gonna check for codes next. spark plugs looked normal. Any other suggestions? i think my fan lost its ***** and I have a crazy long tall hose on the upper side or the radaitor and intake. but people run radiators to the bed of there buggys so i ruled that out but maybe i need to take another look,

 

does it overheat when going 40mph or greater? if so, do you have the air dam or is it broken?

 

I never go that fast lol! sorry if I forgot to say but it's in a wrangler rock crawler. I need to upload that pic of that goofy upper radiator hose see what yall think of it. You'll probably just laugh so I better start there and change it then I will get back to you. Ohhh yea I am going to try to pull codes by jumping pins 5 and 6 correct? see if I can get more info. Thanks again!

 

I have heard over 3 people mention a coolant crossover on the tpi motors. Could this be a problem that I don't have one hooked up, I don't even know where it would go unless they are on the newer style heads because I have heads off a 78 block.