I'm converting to full non seq (rich man's version) but some vac line diagrams leave in the fuel pressure solenoid.


I will still be running the stock fuel pressure regulator so I guess I need to keep this solenoid, right?


Many thanks,
Neal

 

Might as well .save the pump instead of running it full blast all the time .

 

pump will be replaced and as the engine is brand spanking new, I will runnen no to little boost for the brreak in miles

 

No, you don't need it. You can run a vac line from the LIM direct to the FPR.
-Spence

 

please report results in these thred after you finish. i'm realy interested if there is any improvement in gas milage compared to sequential

 

I assume there is, but i will depend on your driving style.

Basically the secondary fuel rail on the 13b will join in when you go into boost. As max boost is delayed to about 3500 rpm with a full non sec conversion, you provide yourself some space below that rpm. So in my opinion this will result in better gas mileage for city driving and crusing speeds, staying out of boost.

And as for the boost lag, just check out for yourself. Most of the time you will be in the 3000rpm neighbourhood when driving and that's exactly where non seq is building boost. The rotary is an easy reving engine so you'll hit full boost at +- 3500rpm in a blink of an eye.

Sue the seq system is fun but I always found it to nervous and it almost forced you to get into boost all the time.

 

Seems that those people who leave the fuel pressure solenoid in are doing it because of hot start issues.

Anyone any feedback?

 

Just put in a aeromotive fpr or any other quality aftermarket fpr and get rid of the factory one. You will need it down the road when you start modifing your car some more anyways. Just set your base pressure and your good to go.

R.K.

 

The factory ECU uses the solenoid to kill the vacuum to the FPR on a hot start and increase the fuel pressure to the injectors. (I don't know if the PFC does it.)

 

You don't need it. The factory service manual states that it's purpose is to increase fuel pressure for hot starts. I don't have it and never had a problem with hot starts.

 

Yes the PFC does control it, but obviously doesn't care if it's there.

 

great info guys thanks

 

so if i run a vacuum line from the intake mani to the FPR , and install a resistor in the connector for the solenoid it`s ok?

all this unit really does is affect cold starts?
the car will run at the correct fuel PSI under boost if you have a line directly to the FPR?

thx