ill be swapping my tbi 305 to a carbed 350 this weekend, my questions are, can i leave the ecu in the car and partially hooked up? this way it will cl icjk on when the key is turned and still lock the converter?

2, i have a 2 port regulator already, can i use a t in the line or a loop of some sort to avoid buying a 3 port?

thanks steve

 

You'll have to use a 3 port regulator.

I'm not sure on the TCC lockup - I yanked my ECM out and installed a vacuum controlled lockup switch in the tranny.

 

I'm about to install a 350 as well in my 84 T/A. Anyone else know if I can keep the ECM hooked up? Will it run ok?

 

The basics of the regulator are that the in-tank electric pump needs a constant flow of fuel to keep from overheating. You can "T" in a return controlled by something like a needle valve, such that you return as much as possible while maintaining minimum fuel pressure under maximum usage - not an easy thing to establish, and most likely you won't return enough to keep the pump happy under "normal" circumstances. A return-style reg is cheap insurance.

The TCC won't lock up without adequate information from the input sensors - engine RPM, TPS, CTS, MAP, etc. Basically your ECM will run the fuel pump.

Ozz1967, with regard to your thread hijacking question - depends upon what you intend to keep. The CC carb ECM will be quite happy running either a 305 or 350, as long as your cam overlap isn't excessive and you keep all of the sensors.

 

why cant i have a t fittign coming ff my fuel line and one go to the carb (regulated) and the other to the return? im thinking this should work,. i already have a converter lockup switch wired but isnt there other stuff liek the fuel pump ran off the ecu?

srry i posted this b4 i seen the post above

 

Sorry about the Hijack, thanks for the info Five7kid, I appreciate it. The search wasn't producing the results I was hoping for.

 

so what all is ran off the ecu?

 

Injectors
Ignition timing
Fuel pump
EGR valve
A.I.R. divert valve
Power steering pressure valve
Radiator fan
TCC lock-up
Vapor canister purge
Shift indicator (manual transmission only)

Also tied to VATS and knock sensor (if equipped).

These vary from model-to-model, engine-to-engine, induction-to-induction, and year-to-year.

And there may be somethings I'm forgetting about.

 

k thanks