Anyone using the Fast EZ-EFI

[Dale Claytor]

I just recieved a Fast EZ-EFI throttle body fuel injection kit today. Was wondering is anyone has installed it and has any pointers, do's and don'ts, etc. It seems to be a tried and true system. Any comments? Thanks!

Dale

[carlewms]

I have no experience with it but ask that you post your lessons learned because I plan to use it on my engine. Carl

[Gordon Levy]

I am a dealer for FAST and have used several of these systems in both single throttle body and stack system. They tune pretty easy. Make sure your wiring is correct and don't put the ECU close to the MSD box if you are using one. Also make sure it has it's own power source.

[Dale Claytor]

Gordon, thanks for your input. I have a question for you. I have an MSD Pro-Billet HEI distributor and it sends a programmed rpm rev limiter signal to the tach when powered on that displays the rev limiter setting for 2 seconds. According to the EZ-EFI instructions, this can cause the ez-efi ecu to read the signal as high rpm's and flood the engine before starting. Is there a way to turn off the msd distributor signal that displays the rev limit on the tach? I don't have a seperate ignition box. I could go to the negative side of the coil to get rpm signal for the ecu, but from what I'm reading, there is a lot of noise coming from the coil that may interfere with the signal, even with the ez-efi rpm module. The way FAST puts it, trash in, trash out. . . I've looked around on the web, but found no answers. If I can't turn off the distributor signal, I'm thinking of installing a power switch to the ez-efi ecu that I can turn on after the rev limit signal is processed by the tach. Any thoughts? Thanks!

Dale


I am a dealer for FAST and have used several of these systems in both single throttle body and stack system. They tune pretty easy. Make sure your wiring is correct and don't put the ECU close to the MSD box if you are using one. Also make sure it has it's own power source.

[Dale Claytor]

Carl,

Will post more as it happens. Thanks.

Dale

[carlewms]

Dale,

Any updates? I am starting the engine installation as soon as the EZ EFI 2.0 system arrives. What coil/ignition system are you using?

Thanks,

Carl

[Dale Claytor]

Hi Carl,

An update and answer to your question. After some trouble shooting, I finally worked out the bugs with my EZ EFI throttle body fuel injection system. The problems I ran into were of my own making, but I didn't realize that at first. After installation and answering a few questions on the EZ EFI system hand held pad, the engine fired right up and ran as advertised. However, after a few drives around the neighborhood, the engine wanted to die when coming to a stop. After some research on the internet, it seems this is a fairly common problem. After going through any and all trouble shooting procedures I could find, I still had the same problem, the engine wanted to stall when coming to a stop. So, I began testing different static timing settings and learned that my EZ EFI likes less advance at idle, around 8* advance. 8* advance wasn't suitable since this affected my total timing. I was looking for 34*-36* total timing, I couldn't achieve that at static 8* advance. So, I began looking at my distributor curve which I had programmed to go full advance at about 2400 rpms. I was using a Quikfuel carburetor before the EZ EFI and had the distributor curved for the carb. After thinking about it for a while, I realized that when driving and slowing down to a stop, my timing was going from full advance to static at just under 2400 rpms. The EZ EFI couldn't adjust fast enough to keep the engine running when letting off the throttle due to the sudden timing change. Although the EZ EFI doesn't control timing, the sudden change in engine fuel requirements and ignition conditions seemed to affect it. To give it more time to "think", I adjusted the curve on the distributor to around 1800 rpms and set my total timing to 34* advanced. I reset the EZ EFI ecu and let it learn all over again. Since then I've had no more problems. To answer your question, I'm running an MSD Electronic Ready to Run Distributor, MSD Blaster Coil, and MSD Digital 6AL Ignition box. The ready to run distributor worked great with the carb, however the distributor has a rev limiter built in that sends a signal to the tach when powered on. This signal indicates the rev limiter setting for about 2 seconds on the tach and will cause the EZ EFI to flood the engine at starting. The tach signal couldn't be reprogrammed on my model distributor, so I went with the MSD 6AL ignition box and turned off the tach signal. All is well now. Hope this helps.

Dale


Dale,

Any updates? I am starting the engine installation as soon as the EZ EFI 2.0 system arrives. What coil/ignition system are you using?

Thanks,

Carl

[WIS89]

Dale-

Thanks for the great detail on the EZ-EFI! That's a lot of trouble shooting, that will save many of us a lot of trouble. Many thanks!!

Regards and S/F!

Steve

[carlewms]

Dale,

Thanks for the update and valuable lessons learned. I am sure it will come in handy in a few weeks.

Carl