Question regarding F.A.S.T. Fuel injection..

[challngd73]

Ok, I am installing the fast ez efi system in my challenger.  I also have installed all new gauges.  The fast efi has a computer, that needs to monitor coolant temp and also air fuel ratio, so obviously they need to be wired into the fast wiring.  But I have a af gauge and a coolant gauge that I'd still like to use too.  Can I splice the aftermarket gauges into the fast wiring?  Or am I destined to have two dead gauges in my cluster?

[brads70]

Could you use a electronic sensor for the computor and a mechanical gauge for viewing in the car?

[bigblue73]

Does your intake have a "dead" port that you can use for another coolant temperature sensor.  I'm a gauge watcher and I need a temperature gauge.  You can always remove the intake and drill and tap a new location.  I do not recommend any modification to the FAST harness.

[challngd73]

Does your intake have a "dead" port that you can use for another coolant temperature sensor.  I'm a gauge watcher and I need a temperature gauge.  You can always remove the intake and drill and tap a new location.  I do not recommend any modification to the FAST harness.

thanks for the responses guys.  Looks like for the air fuel gauge i will run a separate o2 sensor.. The coolant, I will have to run a new port. 

[Chryco Psycho]

if you have a big block the coolant is easy there is a separate plugged port on the pump housing . the O2 will either need to run a seperate sensor or it has to work in the saem ohm range to work right for both

[bigblue73]

Seriously heading down this road now.  Just curious what you are running for ignition?  I've looked at other boards and most are running a MSD set-up.  I'm wondering if it will work with the factory set-up?

[ShelbyDogg]

Fast EZ-EFi doesn't control ignition. You can run the factory ECU, coils and ballast resistor or an MSD.  I have one of my EFI cars running stock ignition, but will convert it  to control timing after I build a base fuel map.   Again, THE EZ-EFI does not control timing.  This is good for solving ignition problems when you have to buy parts at the local Auto Parts store.

[bigblue73]

Their have been a few threads regarding issues with "Noise" in the electrical system that causes variations in idle quality and an over-rich condition.  When I spoke with FAST they told me to make sure that the electrical system is rock solid before the
installation.  I agree with that statement since we are all using 40+ year old stuff for the most part.  I also don't want to convert over to another ignition system if I don't have to.  I'm looking forward to challengd73 installation.