jasond26

iTrader: (22)

I just installed my LSX 427 (8.5cr) motor. I have installed my BS3 LS2/7 system and the damn thing will not start. The 12v power has 12 volts, the BS3 turns on and I can communicate with it. When I crank it I see the RPMs at 150 so I know the crank sensor works. I have pulled plugs and they are wet with fuel so I know they are firing. It backfires once or twice on occasion but nothing like wanting to start.
The wideband works, map, tps, water, air, all the sensors have readings in the BS3. Timing is at 20, crank reference set to 350. I have went up and down with the timing with no change. I just recently noticed that I only had a 100rpm window on my rev limiter so I opened that up to a 500rpm window. I could use some help, the pcm section here is useless.

427lsx (8.5cr)
ngk 7 plugs
atomizer 225lb injectors

Thanks for any help

P.S. called BS3 directly and they said they do not answer tech questions about THIER product, you get refered to vendors......Could not believe it!

Brad Campbell

iTrader: (19)

I don't know much about the bs products, but a quick google search found an ign setup guide. You go Through the diagnostic steps on page 16 and 17 of their ignition setup tutorial?

jasond26

iTrader: (22)

yep sure did

427

iTrader: (3)

Hit the keys B-A-L with it communicating and you will see a small round icon come up on the top of the screen. See if that turns grey while cranking. It sounds like it is working, but make sure. What coils and harness are you using, are you sure they are plugged in right?
The BS3 model is: you ask questions of the dealer that sold it to you, they do not have a tech line. The dealer can normally help you with new set up issues. Like GM, you go to the dealer with new car issues, you don't call GM direct.

Kurt

Fireball

iTrader: (21)

u sure you aren't washing the plugs with fuel?

jasond26

iTrader: (22)

I have downloaded the wiring schematics from BS3 for my harness and checked the fuel injector wiring, coil wiring and cam, crank sensor wiring. All is correct. I am starting to think that I am not getting enough spark to light this sucker off. One thing I forgot to mention was this is an E-85 setup. I assume it is going to be a little more difficult to start. The plugs are gapped to .021. I am going to install some hotter plugs to see if that helps fire it up the first time then I will change to the colder plug. Thanks for the info.

I am using truck coils and harness that came with my 01 5.3 motor. I am going to try the BAL thing now.

jasond26

iTrader: (22)

Ok I did the BAL and a little icon was at the top of the screen, it didn't change color it stayed red.

Brad Campbell

iTrader: (19)

If you read this document;

http://bigstuff3.com/pdf/Ignition%20...0rev%201.2.pdf

Bottom of page 16 top of 17 walks you through the process of checking the cam and crank synchro event phasing. I don't know enough to tell you what you need to do to fix it, but the red dot is outlined as a problem.

Hopefully 427 can help you out more with this one. Good luck!

MIGHTYMOUSE

iTrader: (59)

turn fuel pressure waaaaay down for a second and see if anything improves

jasond26

iTrader: (22)

thanks I will take a look at that again, its kinda a wierd looking icon so I will look at it again. I have a mechanical fuel pump so at start up the fuel pressure is pretty far down anyway.

Brad Campbell

iTrader: (19)

I would almost suggest disconnecting/disabling the fuel system till you have a timing light on the ignition showing atleast #1 firing where it's suppose to be.

Fireball

iTrader: (21)

prime it with a drill....you might never get enough to start otherwise. you might need to give it more pulsewidth in the cranking table too

jasond26

iTrader: (22)

I did the BAL again and the little icon pops up at the top next to the connectivity bar. Its a red diamond with a little grey dot. Nothing ever moves. I primed the pump with a drill and get crap loads of pressure, I know I have fuel becuase every time I turn it over I can smell it. I don't think this sucker is firing. I know that the directions say to have 12volts while cranking which I do not. I have a optima red top that has 12 volts but it drops down to 10 volts while cranking. Could this be an issue? Thanks for the help guys I really appreciate it.

Brad Campbell

iTrader: (19)

Disable the injectors, check the fix timing box, and verify the timing angle with a light. I would imagine it'll fire down to 9 or 10 volts... they are probably suggesting to check for 12v while cranking for the people who accidently wire the control up to an interrupted ignition/acc. wire.

427

iTrader: (3)

If the icon is not turning around and changing to grey color you have no cam pulse and nothing will work. Sounds like you have two problems as it will not open the injectors without cam pulse.
1. Check for leaky injectors.
2. Try swapping your outside two cam sync wires on the sensor, if this works the BAL part will turn grey and the small dot will rotate when cranking.

Kurt

Brad Campbell

iTrader: (19)

Kurt, Do these systems default to batch if the cam sync is missed, or is it an all or nothing scenario?

427

iTrader: (3)

The dist systems will fire the injectors without cam, but the cop I don't believe will. I always check for rpm and cam before I turn the fuel on, so I am not positive on the cop system. If it has the longer harness to run the sensor in the front cover it will be pinned for a stock engine. The stock engine has a jumper harness that runs down to the oil pan rail on the drivers side. For some reason that jumper harness switches the A and C wires. To make it confusing the plug is the same on the end of the harness, it will plug into the ext or the sensor. I have made a few grey hairs over this one!

Kurt

jasond26

iTrader: (22)

Well I think I have it narrowed down to no cam sensor signal. The BAL dot stays red and does not move. I tried swapping the a and c wire with no change. I get fuel just no spark. I have double checked my ground. I get 12 volts during cranking. I bought the sensor new from a vender but I will buy a new one monday to make sure. I measured the distance from the pickup to the sensor and got it within .030. It just will not get cam signal. Is there a way to bench check the cam sensor? Thanks for all your guys help.

jasond26

iTrader: (22)

Could the internal setting in the BS3 be causing the system not to see the cam signal? Under operating parameters config should the crankshaft pulse be 58 or 60? I am running 58x reluctor and 4x cam gears. Thanks

Brad Campbell

iTrader: (19)

Should be 58.