Need help with turboed 420A fuel cut out.

[mirandaeclipse]

i have bad news yestarday i take off the fmu from the engine bay and put it on under the car, close to the tank, i remove the rubber line form the cover of the tank and i conected to the side port of the fmu, then i get another rubber line from the upper port of the fmu and i conected tho the stock fpr(that was the way that the rubber line was conected) i get the vaccum line from the intanke manifold, i take a little ride to check if the car works better and nooooooooooooooo the fuel cut still there at 3psi of boost, i´m thinking that the missing link does not work in my car, damn i´m rally sad bacause i tought that whit the missing link the problem will disapear, the only thing that left to try its to get an electronic fuel cut defender. so i will ask to paul if he can help me whit that little problem because here in mexico it will be almost impossible to get one.

 

[totaleclipse_05]

Take the missing link out completely and run straight MAP sensor and see if there is fuel cut still at WOT. When I had my 99 Eclipse, it would run perfect without any sort of FCD or Missing Link at WOT, but if I partial throttle boosted for a second, it would cut the fuel. Do that and let us know what happens. If it boosts past 3 psi, you know you need an FCD.

Also, when you hooked up the FMU, did u do the bottom port, opposite end from vacuum line, to the gas tank and the side port to the stock FPR? If not, that could possibly be the problem as well. Also make sure to use high-pressure fuel injection hose, not the regular stuff. The regular fuel line will blow from all the high pressures the FMU will create.

 

[mirandaeclipse]

totaleclipse_05 Take the missing link out completely and run straight MAP sensor and see if there is fuel cut still at WOT. When I had my 99 Eclipse, it would run perfect without any sort of FCD or Missing Link at WOT, but if I partial throttle boosted for a second, it would cut the fuel. Do that and let us know what happens. If it boosts past 3 psi, you know you need an FCD.

the car it´s the same whit or whitout missing link, i hope that whit the fcd the problem dissapears

 

[mirandaeclipse]

i´m so happy the fcd, arrived this morning, thanks paul.
i cant wait to install it and see what happends

 

[VelocitàPaola]

Good. I'm happy that the shipping worked out.

 

[mirandaeclipse]

last saturday i installed the fcd but, i cant get it tune it right it´s necesary to have at least 1psi of boost on the intanke manifold to can tune it ?
i use the safc to watch the voltage of the map sensor, then i set the voltage to 4.57 and the ful cut appears again at 1 psi.
i wonder if there´s another way to tune it whitout boosting the intanke manifold? or should i tune it runing the car?

 

[VelocitàPaola]

last saturday i installed the fcd but, i cant get it tune it right it´s necesary to have at least 1psi of boost on the intanke manifold to can tune it ?
i use the safc to watch the voltage of the map sensor, then i set the voltage to 4.57 and the ful cut appears again at 1 psi.
i wonder if there´s another way to tune it whitout boosting the intanke manifold? or should i tune it runing the car?

Try setting it to 4.50V, then see what happens. You might get a CEL at that voltage, but it's an easy way to test whether or not the MAP sensor is the reason for your fuel cut. From there, you can adjust the FCD upward until fuel cut happens again; just so you know the threshold.