MSefi.com read only forum (Jan.15,2018)

Hello,

I am running the latest B&G code on a MS2 and I was just able t get the 306 Windsor started for the first time. I am controlling the coil with the squirt and am using a 2 wire distributor with a VR sensor. The fuel system is a FAST 4 85lb\hr injector TBI. I have played with the ve table and spark advance table slightly, but I have an extremely high idle 3500+. I have been able to get the fueling to respond by fuel additions or reductions so I think I am heading on the right path. Any input or suggestions that could help me decrease the idle RPM would be welcomed.

Thank you,
Brad

According to your MSQ, you are not using MS to control your idle. Try reducing the idle with the idle stop if so equipped.

Ken

Thanks for the reply Ken. I have the throttle blade stop screw adjusted so the blades are full closed, but I think I may have an issue with the gasket between the intake and tbi. I'll check it out and see if that helps.

Thank you,
Brad

Yep.......... Sounds like a vacuum leak then!

Ken

Ken,

I see you are using a similar TBI setup to mine, any tips or tricks to setting fueling? Did you find simultaneous squirts or alternating squirts to work better for you etc..

Thanks,
Brad

Hi Brad,

The big difference between our setups is the firmware! I am running Extra code, so some of my setup won't be applicable to your MS.

I am running 2 squirts simultaneous, mostly because I run staged injectors and simultaneous is required.

I will attach my current msq, but REMEMBER it is using Extra code!

Ken

Hi Ken I uploaded your MSQ and I have to say MS Extra looks like the real deal. I kind of like the simplicity of the B&G firmware, but I like the control and the diagnostic tools that the extra code offers.

By the way I had multiple vacuum leaks lol.

Thanks again,
Brad

br1070 wrote:Hi Ken I uploaded your MSQ and I have to say MS Extra looks like the real deal. I kind of like the simplicity of the B&G firmware, but I like the control and the diagnostic tools that the extra code offers.

Early on I ran B&G code on a TPI setup on my grandsons Chev 350 truck. When I started the current Corvette project I switched to Extra and have never regretted it.

br1070 wrote:By the way I had multiple vacuum leaks lol.

Had a hunch you were going to find the high idle issue there.

Ken

EDIT: Just curious...... Does the FAST TB use a 4 wire IAC like the Holley Pro-Jection?

If your IAC is this one i found online then i dont think so. The IAC for the fast is from a LS era IAC valve which is still 4 wire, but slightly different i believe.

https://www.holley.com/products/fuel_sy ... arts/543-2

Brad

Actually, this is the one my Holley Commander uses........

https://www.holley.com/products/fuel_sy ... ts/543-105

Ken

That's probably the same iac the fast unit uses.....I'm having to research which iac it is because I bought my tbi second hand without sensors.

Brad

Well.....since I attempted to plug the vacuum leaks things have gone a little crazy.....

The idle RPM,AFR, MAP, EVERYTHING except throttle position look like they are riding a roller coaster lol. I have attached a log and MSQ used for the log......not sure where to go from here.

Thanks