NoPistons -Mazda Rx7 & Rx8 Rotary Forum - Flooding out after a Walbro upgrade

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- - Flooding out after a Walbro upgrade (https://www.nopistons.com/ecu-discussions-23/flooding-out-after-walbro-upgrade-56436/)

Hey,

I had the car running for about 1000 miles (engine break-in period) on a stock TII fuel system, then, I upgraded the fuel pump to a Walbro and the secondary injectors to 720s. The MT still has a basic map on it, although it has been toyed with a bit by a tuner friend of mine. The tuning was done on the old fuel system.

I cant start the car with the new fuel system componenets. The car is behaving exactly as a flooded engine does. I crank it over, and the thing floods right up, and wets the plugs.

What do I need to change to get this thing to fire up?

-a

retune for new injectors.

Why would you need to? The secondary injectors shouldn't be used for startup or idle. Unless he's running batch injection setup...

HA! missed the secondary part. also, which might/might not be your problem, when i set up my pump to run constant 12V it runs super duper rich at idle.