let me know how it goes. I'm so frustrated right now I'm thinking of selling the car after 26 years

From everything I have read the majority of the problems with these systems relate to power and ground issues. I would go back and confirm the basics first. Power and ground direct from the battery for both the computer and the handheld. Good chassis to motor ground. Good solid connections.

looks like it may be something with the fuel delivery. Everything else seems in order but I spent 30 mins trying to get the thing to start and it just wouldn't turn over. I put 5 extra gallons of gas in (10 total) and jacked up the rear so it was nose down and got it to start. It ran like crap and felt like it was struggling to stay running. If i held the idle at 1200-1300 rpms it would stay running. Letting it just idle by it's self it would run down to 600 sound like it was going to die then run it's self back up to 1100 for a few seconds before it went through the cycle of winding down then up. Maybe the fuel filters are clogged up?

you really need to start from scratch - and look at how it was installed.

Go over every nut and bolt of the installation.

Read the directions over and over till it's understood.

( you are complaining about cold starts - well they take the longest to learn ) you need to get it running warm and then the cold starts take care of themselvs

What fuel system are you using? how are you getting fuel to the tank?

what size if the supply AND return lines

are your efi boxes near the ignition at all?

what coil? if stock did you ground the noise filter correctly?

power? direct to battery?

I had mine on over a year and a half - I had a few bugs to work out in the beginning but it has been running strong for over a year and a half now with no issues

where is the power hooked up at? numerous guys have asked and you refuse to answer this simple question for some reason...

power is directly to battery and so is negative. 3/8 lines. Computer is mounted just above the high beam switch on the floor. I've gone over all connections and grounds 2 or 3 times. The coil is an MSD masterblaster2, and it is was wired correctly. I had the unit professionally installed to make sure that I didn't screw anything up. At this point I'm thinking of taking off the fuel pump to check the filters and check the filter in the tank to make sure it's not gummed up

What about your 12V key on source????!!!!! This is one of, if not the most important connection on the system.

If your fuel system is having issues it would be as simple as noticing a serious fuel pressure fluctuation at NO load or under load. We lost a fuel pump early on in our first build and it simply would not run past idle....no backfires or erratic idles....just would not run.

I had the EZ on my BBC in my Chevy truck. It ran decent but was never stellar. I did put it in with a lot of fore thought as I am no novice with EFI systems. After some tuning and driving it got better but I eventually went back to the carb and HEI. Simple is best.

Take heed to everyone's suggestions here as we have "been here and done that"

You will get it sorted out. But, comparing apples to oranges, simplicity will always win me over. Just my $.02
The EZ-EFI is a good system but my next iteration will be a mill and the associated OEM components that work in unison. Enough of the "bolt on" trial and tribulations crap for me.
Good luck,
Bud

since i didn't wire I'm assuming it's keyed directly to the ignition when I turn my key. The guy who did followed the instructions to the letter

If you suspect the pump, hook up your battery charger to the car, unhook the return at the tank and put it in a 5 gal can and see how much it will pump in 1 minute. Make sure your battery charger is putting 14v to the battery and that you're getting 13.5v (or at least the same amt of volts you get with the car running) to the pump itself and give it a test.

I ruined my first efi pump quickly cuz of crap in the tank that got stirred up and I neglected to replace the first piece of rubber hose out of the pickup. Packed the pump full of rubber bits.

keyed directly to the ignition switch, and I'm not getting any error codes. I took pics of my computer at 1400 rpms and a few just at idle, 800 rpms (but set to 900). First 4 pics are at 1400 next for at at 800. do my numbers look normal?

2

3

4

800 rpm 1

2..

3..

4..