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The RPM noise at Key on, for me came from the O2 sensor wires, when the o2 preheat was on.. The new software allows you to turn off the pre heat, and voila no rpm signal with key on engine off.

exactly.. And I tried for a long time, then bought the right distributor.. NO issues since. Ken

Can't answer all your questions. I have the Fitech. Main power feed is to the Battery, with a fuse. No issues with power drain when motor is shut off for extended periods. I tried hooking that line up elsewhere at my main power junction box (car is entirely rewired) and found it did not...

My "low flow" was set at 41.6, mid at about 89 and high at 97.9 I changed that today to set low at 40, and mid 58. I believe the " flow" percentage changes between those set points based on need or input from the ECU? Ken

I will check at lunch and let you know what it is set at.. I forget.

Mine is running at about 50% on 'Low Flow", I had it set that way before.. My return/vent line is only 3/8 inch and the manual pump is keeping my input low side pressure at about 4 PSI

I have modified my FCC and so far no issues.. Fuel command center is much cooler, even without the heat wrap I used to use. Before if my motor got up to temp ( 195), the FCC would seem very close in temp to engine temp. Now there is marked difference in the Command center temperature (...

Anytime

If you search on the chevelle web site, there are some examples listed there.. I think you unhook the spring, unwind 1 turn and hook back up. I believe it is a bit challenging to do.. FITECH EFI throttle return - Chevelle Tech

I believe some owners have changed the tension on the spring, but I have not..

I have a light spring on it, but the spring on the unit itself is quite strong.

Check the air/fuel ratio when you get on it. You may need to change your accel pump settings. Mine would backfire and sometimes die, until I put more fuel into the accel pump. ken

Good. Do you have a computer based camera that you could mount and have a passenger observe while you are driving ? Might be a way to see what's going on. Ken

Are you using a PCV System ?

Ron Francis Wiring kit XP-68 Dodge/Chrysler Powered EXPRESS Wiring System MSD 6AL Pace Performance Billet Pro Series Distributor ( ask Johnny for the right one ) MSD Blaster HVC Ignition Coil - 8252 or something like that ? Ken

Well, when I did mine, I used grease on the drill bit, ran a vacuum while I drilled, and placed my brass barb inside the trunk, just above the trunk surface. I used epoxy seal all, and have had no leaks, smells or issues since. My filler neck has an inner sleeve of some sort, so I used the...

You might just be better off to replace that single line with new rubber hose. probably plugged somewhere from age. Yes EFI forever. Ken

I ran a new line, my 65 did not have any return lines .

Basically what I did, with a barb as low as possible into the filler pipe..( granted i did not pull the pipe) no issues.

For all systems. Mine is a power adder ( without the power adder being used ) Ken

Manifold Vacuum to both throttle body regulator and FCC regulator if you have one, was added as a tip from Fitech on their FAQ sections.. Found it myself , quite by accident as well.. But it lowers Fuel pressure at idle by about 10 on my system. And a relearn won't hurt to start fresh...

On the issue of key on engine off random numbers, I think you will find that it is the o2 sensor wires, when the o2 heater is active prior to starting. In the most recent software they sent me for Go efi 4 power adder version, it has a setting to turn the pre heat off, and that got rid of...

I don't have the exact headers but with my Hooker Super competition headers, I use a swivel adapter like these. I support the socket at the plug with my hand to ensure the pressure is applied "squarely", without any twist. I use short or mid length socket extensions as required to work...

yes mine will only got to 44. then it indicates max value, so it appears it can do 30 degrees from distrib base setting of 14. Ken

From what I have learned.. The engine will crank on your base timing 14.. then once running will adjust to what you would like, 18. Set the timing at the various breakpoints to the timing that you want it to run at.. I use 34 on my WOT settings for 3000 and 6000 rpm, and higher...

Nice car!! I had an 81 Cordoba from new, for ten years. rode great.. Wish I still had it!

First thing I would do is set your handheld up where you can watch it and then use the large gauges to view the AFR. See what it is doing at the time it causes your issue. Ken

My fcc is right beside my radiator. Have it partially heat shielded.

I would watch your map numbers at the time you get that lean issue when getting back on it.. You may be at the point where fuel is being shut off. DFCO cut fuel map If you are, then try lowering the dfco number to slightly less than what the MAP numbers say. Bring the DFCO return map just...

Well, with the change to timing control with the TSP Billet distributor, new software for my go efi 4 power adder, which allowed shutting off the o2 sensor pre heat and finding a problem with the tach input line and changing it( it was grounding out causing sudden and random system shut...