MSD Crank Trigger w/ Accel DFI 7 on LT1

Jason Leindecker · 05-13-2009, 12:33 PM

I have just added a Crank trigger, 6al, and coil to eliminate previous problems with the MSD Lt1 distributor. I disconnected the distributor and only have the coil wire going to it. I have plenty of spark at both the coil and the plug. Now i dont have fuel ( i have 60 lbs of FP @ regulator). I am assuming the DFI needs a signal from the ignition to fire the injectors (batch fire). If so how does this get wired.

Thanks
Jason

Rich Biebel · 05-13-2009, 01:43 PM

Jason it's been a couple years or I could tell you real easy what you need to hook up. I had a similar issue and had a former Accel DFI engineer give me some help when I first got my Firebird up and running. I met him on another website and he helped me a great deal. I had my box updated and bought a datalogger thru him from Accel. All the info is buried in the Accel instructions along with the pinouts and connections from the ECU. I believe I had a seperate wire ( white) tied from my MSD box to the ECU. I had an MSD 7AL2 and it failed so installed an MSD Digital 6. I will look around to see if I have any notes or what I might have on my home PC......Rich

Jason Leindecker · 05-13-2009, 05:36 PM

Thanks Rich I would appreciate that.

Rich Biebel · 05-13-2009, 06:45 PM

Jason......I spent some time looking at the Accel info on their website to refresh my memory. I am almost positive you need to send the tach output signal from the MSD box to pin D on the ignition connector. It is an 8 pin weatherpak and D is crank positive. Tach output is a 5 volt squarewave on the MSD. You also might need to reconfigure your ECU's ignition info for that crank trigger signal. You have to look at the installation guide for various ignition signals for that, I can verify the wiring pretty easily as my old car is raced locally a lot by the present owner but I am pretty sure I am correct. My car would not start when I first attempted to fire it and it was exactly the trouble your having. Splice a wire from your tach wire ( green) to that pin D on the ignition connector. You will need to immediately check your timing when it starts. You won't have anymore ignition problems with the trigger on there. You do need to have a good cap and the rotor is another trouble spot to keep an eye on from what I've heard. I had the MSD cap and rotor and it has been on that car since day one with no problems and probably 100 runs on it.......Rich

Jason Leindecker · 05-14-2009, 05:31 PM

Thanks Rich it worked perfectly. It fired right up 38* of timing and stayed put. Put some heat in it and then shut it off for a moment. Refired without any problems. Thanks again for your time. I owe you a cold one.

Rich Biebel · 05-14-2009, 06:05 PM

Your welcome Jason.......I kind of miss my Firebird and messing with the fuel map......but then I get in my carbureted dragster and quickly get over it ! See you at the races....

05-13-2009, 12:33 PM	#1
Jason Leindecker Junior Member Join Date: Feb 2006 Location: Center Valley, PA Posts: 18 Likes: 0 Liked 0 Times in 0 Posts	MSD Crank Trigger w/ Accel DFI 7 on LT1 I have just added a Crank trigger, 6al, and coil to eliminate previous problems with the MSD Lt1 distributor. I disconnected the distributor and only have the coil wire going to it. I have plenty of spark at both the coil and the plug. Now i dont have fuel ( i have 60 lbs of FP @ regulator). I am assuming the DFI needs a signal from the ignition to fire the injectors (batch fire). If so how does this get wired. Thanks Jason __________________ Jason Leindecker

05-13-2009, 01:43 PM	#2
Rich Biebel VIP Member Join Date: Jun 2007 Location: Northern New Jersey suburbs Posts: 2,314 Likes: 25 Liked 544 Times in 213 Posts	Re: MSD Crank Trigger w/ Accel DFI 7 on LT1 Jason it's been a couple years or I could tell you real easy what you need to hook up. I had a similar issue and had a former Accel DFI engineer give me some help when I first got my Firebird up and running. I met him on another website and he helped me a great deal. I had my box updated and bought a datalogger thru him from Accel. All the info is buried in the Accel instructions along with the pinouts and connections from the ECU. I believe I had a seperate wire ( white) tied from my MSD box to the ECU. I had an MSD 7AL2 and it failed so installed an MSD Digital 6. I will look around to see if I have any notes or what I might have on my home PC......Rich __________________ Rich Biebel S/C 1479 Stock 147R

05-13-2009, 05:36 PM	#3
Jason Leindecker Junior Member Join Date: Feb 2006 Location: Center Valley, PA Posts: 18 Likes: 0 Liked 0 Times in 0 Posts	Re: MSD Crank Trigger w/ Accel DFI 7 on LT1 Thanks Rich I would appreciate that. __________________ Jason Leindecker

05-13-2009, 06:45 PM	#4
Rich Biebel VIP Member Join Date: Jun 2007 Location: Northern New Jersey suburbs Posts: 2,314 Likes: 25 Liked 544 Times in 213 Posts	Re: MSD Crank Trigger w/ Accel DFI 7 on LT1 Jason......I spent some time looking at the Accel info on their website to refresh my memory. I am almost positive you need to send the tach output signal from the MSD box to pin D on the ignition connector. It is an 8 pin weatherpak and D is crank positive. Tach output is a 5 volt squarewave on the MSD. You also might need to reconfigure your ECU's ignition info for that crank trigger signal. You have to look at the installation guide for various ignition signals for that, I can verify the wiring pretty easily as my old car is raced locally a lot by the present owner but I am pretty sure I am correct. My car would not start when I first attempted to fire it and it was exactly the trouble your having. Splice a wire from your tach wire ( green) to that pin D on the ignition connector. You will need to immediately check your timing when it starts. You won't have anymore ignition problems with the trigger on there. You do need to have a good cap and the rotor is another trouble spot to keep an eye on from what I've heard. I had the MSD cap and rotor and it has been on that car since day one with no problems and probably 100 runs on it.......Rich __________________ Rich Biebel S/C 1479 Stock 147R

05-14-2009, 05:31 PM	#5
Jason Leindecker Junior Member Join Date: Feb 2006 Location: Center Valley, PA Posts: 18 Likes: 0 Liked 0 Times in 0 Posts	Re: MSD Crank Trigger w/ Accel DFI 7 on LT1 Thanks Rich it worked perfectly. It fired right up 38* of timing and stayed put. Put some heat in it and then shut it off for a moment. Refired without any problems. Thanks again for your time. I owe you a cold one. __________________ Jason Leindecker

05-14-2009, 06:05 PM	#6
Rich Biebel VIP Member Join Date: Jun 2007 Location: Northern New Jersey suburbs Posts: 2,314 Likes: 25 Liked 544 Times in 213 Posts	Re: MSD Crank Trigger w/ Accel DFI 7 on LT1 Your welcome Jason.......I kind of miss my Firebird and messing with the fuel map......but then I get in my carbureted dragster and quickly get over it ! See you at the races.... __________________ Rich Biebel S/C 1479 Stock 147R