I just finish the install of my powerjection3 system on my big block its a 396 bored 60 over hp number is 390 and torque checks out to be 372. I'm having a heck of a time getting the car to start nice and easy with out putting a battery charger set to start mode on the battery. I have went into the software and try to adjust the tables so it does crank for a long time to start but even at that it doesn't help. I don't see to many people with a powerjection3 system and if I do they don't have any issue with theirs.

I was planning on putting the pj3 on the 64 i have herd very good things about it. are u having fuel pump issues you think? are you running a return or did you install the box so you dont have to?

I have a return line right now it looks like the issue is lack of gas as my PSI gauge is only showing 20 where the other day it was showing about 45PSI. I did not get the kit with their fuel pump or fuel regulator. I do have one of the techs looking at a log file I sent in. Right now I'm in the tweak stage as its a learn as you go system. The manual leaves out a few good points like the settings of the butterflies.

Does anyone know the output level of these powerjection systems? I have a powerjection I system and had it installed on a 396 with no issues. Love the system really. I'm currenly building a 496 and will put out somewhere in the neighborhood of 600hp. I plan on calling Retrotek tomorrow to get some answers, but salesman will tell you anything you want to hear. Just curious to know if anyone here is supporting a solid 600hp engine and if so, which injectors do you have installed and the idle quality.

hi lead since you have a powerjection 1 maybe you can guide me though how to keep the injector from running rich at idle. I want to say the powerjection 3 probably handle 600hp i know it can handle some boost but i don't remember right off the top of my head.

I did a bit of research and got some answers on the 600hp issue. I'm going to upgrade to some 80 lbs/hr injectors. This should take care of my issue. I may need to bump up the fuel pressure a little to compensate, but that'll only be for WOT times. I'll give it a shot and see what happens.

On the idling rich issue, what's your A/F mixture ratio at idle? One thing that a person needs to remember is that it's Air (big number) to Fuel (1) ratio. Many people want to lower the "big number" down to achieve lower fuel. In actuality, it's just the opposite. Raise the "big number" to achieve less fuel. More air to less fuel. You should be somewhere around 14:1 a/f ratio. If it's a small cubic inch engine, may even need to go up to around 14.5:1 a/f ratio. Just watch that you don't go too lean.

Really, you'd need to give me a little information or take a screen shot and post or e-mail.

I did have it set at 13 then i went to 12.5 thinking that would work in lowering the air/fuel ratio. Motor wise its a small cubic inch big block coming in at 404(396 bore 40 over stock) I will try and raise the a/f ratio up to 14 or 14.5 and see if that makes a difference I know 12.5 gave the plugs a wet look of fuel on them.

Don't worry, it's a common mistake to think that if you lower the number, that less fuel will be delivered. It's completely the opposite. The higher you raise the number the less fuel will be delivered. With a 404 cubic inch engine stock to mildly modified, I'd be somewhere around 14:1 a/f ratio. And of course this depends on many other factors. Injector size, timing, gap of spark plugs, etc. Try 14:1 and see where that puts you. You may even need to go up a little more.

Well got around to hooking the laptop up to the system today and was able to grab a log file. I set the a/f ratio to 14.5 and let it run for a few and noticed a little popping out the exhaust when the rpm's came down. Timing is around 32* at 3200 rpm's plug gap is .035 and I'm running a MSD digital e-curve dist. I'm not sure how to get the popping out of the system when the rpm's come down unless I need to change the deaccel table.

If you can, do a print screen of your table. You may have other blocks in the table that are too much of a change going from the 14.5 or coming back to it.

Looking at your table, of course you have 14.5 in the idle column, but what are the other numbers at the various throttle percentage columns?

The whole air/fuel table is filled with 14.5 I'm still messing with it when the temp's aren't that high.

You'll definitely need to change the other RPM fields. 14.5 will be good to start out with for idle. Then at your highest RPM level, you'll want to go no lower than about a 12.5-13 for your engine. Between the 14.5 in the idle column and the 12.5 on the column farthest to the right, you'll want to fill in numbers that will gradually go from one to the other. This will be a good starting point, then take it out for a ride with your laptop and make changes accordingly.