what up peolpe ive been here a while but i decided to make an account, I recently bought a 1993 fleetwood with a 350 5.7 tbi, as ive noticed tbi are tricky, not alot of after market products.. i wanted to add some power to my engine and wanted to know whats the way to go, not looking to make a beast but a little more power is always good,

i also have some problems, my first one was that when you accelerate the car stumbled, and it overheated once, the car was parked for a year so im driving it to see what needs to be fixed, i endend buying a new gasket for the egr valve and solved the problem 80% now it rarely stumbles but im buying a new egr valve to correct this problem, but i think i have a coolant problem, the reserve is empty but when i turn on the car it goes up i know its normal but if i add coolant to the reserve it goes back to low, the fans kick constanly and no leaks, i replaced the radiator cap and coolant is not dirty

 

Well your wrong about TBI not having aftermarket parts available so start reading the stickys.

Coolant can be going anywhere while your driving, have you checked your oil and tranny fluid for starters...

 

Make sure to check fuel pressure too, should be steady around 11.5psi.

For more power: cam, heads, maybe exhaust (not sure since it's not f-body) and then set up and tune the TBI to feed it.

Other then adjusting fuel pressure, and tuning there is basically nothing that needs to be done to the TBI system sitting on top of the engine, to support around 280hp.

 

I managed to fix both problems but I did get a new one, the idle is rough but doesn't shut. Down just shakes lot and Its not showing up codes, any idea what can be causing this??