Need Help with My LS3 Please
Thread Starter
Teching In
Joined: Aug 2012
Posts: 21
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OK Thank you very much. Can I mess up my engine by setting the idle timing at 24 and the max timing at 40? If not then I will start with that and try to fine tune things as I go.. I just need to get it running so it can start building its mapping system. Thank you
John
John
Not really sure how they do it but what I did with a 6010 box was ran 32 total and added timing with the vac advance at idel and cruse. also had a curve baised on RPM.
Didn't work all that great for compaired to the Holley. Would spark nock with heavy load and no rpm even with low 20's just was not enough control.
Tim
Didn't work all that great for compaired to the Holley. Would spark nock with heavy load and no rpm even with low 20's just was not enough control.
Tim
Thread Starter
Teching In
Joined: Aug 2012
Posts: 21
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Feel free to cuss me out and call me retarded. I am very sorry but I have no idea what that means. This is the very first time im doing anything with fuel injection and a Computer. I want to understand please.
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Verdad Gallardo Thread Starter
Teching In
Joined: Aug 2012
Posts: 21
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OK quick question for you.. My neighbor who races said its my fuel pump because 1) its screaming loud... Its really loud and 2) he said one time when he was racing, he was driving his car on the track, it would hit about 3 grand and die out, but at idle in park he could rev the engine all day long at it wont die out. Thats the exact issue im having. Would this still apply to an LS motor?
Ive changed the Timing from every angle I could and still now difference.
Thanks
John
Ive changed the Timing from every angle I could and still now difference.
Thanks
John
I honestly think there's more going on here than your timing map. There are many many variables to consider, and that is just one of them.
So since you have only a very basic understanding of EFI and this system in particular, you need to start a diagnostic process on it from the top to the bottom, hence some of he questions I was asking you the other day.
Ill assume there's no crank reference angle adjustment with this system. Even still, you should mark the balancer for #1tdc and rig up a pointer to verify that what's showing up on your little speak-n-spell tuner is indeed what's happening at the plug.
Check your fuel pressure. You should have 58-61 psi at all RPM and load, unless theres something that EZ asks you to do that I'm unaware of.
If those check out, verify the cam timing either by putting a dial indicator on top of a rocker arm with a soft spring swapped onto that valve, or by pulling the balancer and front cover. The balancer seal isn't reusable.
You could also be running very lean for a multitude of reasons. Typically EFI engines pop when they're lean, and smoke /stink when they're rich. If your EZ has a wide band O2 it'll be very easy to monitor this. The real FAST system has had a WB02 for almost 15 years that you can watch in real time and show as an AFR.
So since you have only a very basic understanding of EFI and this system in particular, you need to start a diagnostic process on it from the top to the bottom, hence some of he questions I was asking you the other day.
Ill assume there's no crank reference angle adjustment with this system. Even still, you should mark the balancer for #1tdc and rig up a pointer to verify that what's showing up on your little speak-n-spell tuner is indeed what's happening at the plug.
Check your fuel pressure. You should have 58-61 psi at all RPM and load, unless theres something that EZ asks you to do that I'm unaware of.
If those check out, verify the cam timing either by putting a dial indicator on top of a rocker arm with a soft spring swapped onto that valve, or by pulling the balancer and front cover. The balancer seal isn't reusable.
You could also be running very lean for a multitude of reasons. Typically EFI engines pop when they're lean, and smoke /stink when they're rich. If your EZ has a wide band O2 it'll be very easy to monitor this. The real FAST system has had a WB02 for almost 15 years that you can watch in real time and show as an AFR.
Also, verify what EZ hardware youre working with. You say you have an LS3 intake, so you're not using the EZ top mount throttle body, are you running their fuel pump, regulator and injectors? There's a chance your fuel system is set up incorrectly as well.
Thread Starter
Teching In
Joined: Aug 2012
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I have the EZ 92mm throttle body for the LS3 intake.
OK so I went to my local speed shop and they said for sure my fuel pump is bad. They said no matter what I set the timing at, the car would not run right because the computer is trying so hard to get the A/F mixture right. Since i'm not receiving enough fuel, the computer cant adjust properly. This of course, is per the speed shop.
So then my question is after I install the new fuel Pump what would I set the:
Idle timing at
Max timing at
All-in RPM
Vacuum Advance
and my Idle at.
inside the XIM box?
The engine is stroked and is estimated at 650 to 675 horsepower based on how the engine was built and blue printed and balanced.
Thank you everyone for all the help.
John
OK so I went to my local speed shop and they said for sure my fuel pump is bad. They said no matter what I set the timing at, the car would not run right because the computer is trying so hard to get the A/F mixture right. Since i'm not receiving enough fuel, the computer cant adjust properly. This of course, is per the speed shop.
So then my question is after I install the new fuel Pump what would I set the:
Idle timing at
Max timing at
All-in RPM
Vacuum Advance
and my Idle at.
inside the XIM box?
The engine is stroked and is estimated at 650 to 675 horsepower based on how the engine was built and blue printed and balanced.
Thank you everyone for all the help.
John
Thread Starter
Teching In
Joined: Aug 2012
Posts: 21
Likes: 0
IT"S WORKING NOW!!!!!!..... I bought a Holley fuel pump, installed it, and the car runs like a raped ape. It runs above 3300 RPM's. I set my idle timing at 20, my max timing at 30, my All In RPM to 2800 and my Vacuum Advance to 10 degrees. Are those settings good for a LS3 motor that is stroked?
