No Spark on new install.

#1 · May 30, 2023, 8:55 pm

Hey there folks, I'm new here and I hope someone can lend me a hand. I'm trying to get a 600HP Fi tech to work on a 400 small block in my 84 monte Carlo I want to use the spark control feature as well. This is my set up.

MSD Pro-Billet Locked-Out Distributor 85501

MSD Blaster 2 Ignition Coil 8202

MSD Digital 6AL Ignition Controller 6425

When I hook up the black wire from the 6 pin connector I don't get any spark. I'm hooking this wire up to the white wire on the MSD box and then running the green/purple plug from my throttle body to the distributor connector. I get no spark and I don't see RPM on the Fi Tech controller. To check that I don't have any bum parts I swapped it over to not timing control, so blue wire to the (grey) tach wire on the MSD box and plugging the MSD box into the 2 wire distributor plug and then I do get spark...and an unhappy engine because its got a locked timing.

I'm not positive but I THINK that I might have a distributor that is not correct, since the Fi Tech can't "see" it. Said unit is a mag trigger and locked from MSD so I thought I was golden. I have run the engine (with a carb) on a dyno with this distributor and it worked then. I have made sure that the computer was on the right (Tach/2wire) setting each time I have done this.

Any help would be appreciated I'm very much at my wits end here.

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Its the 2nd rat that gets the cheese

#2 · April 23, 2024, 2:45 pm

Same issue....but I can tell you it will run with that distributor, mine was running fine for about 6 months. Now, not so much. Under a load, the spark is all over the place. Wish I could help more with my answer, but all I can say is your physical setup is good, it will work.

anwat sadat

#3 · April 24, 2024, 9:41 am

Quote from Tiptoe on May 30, 2023, 8:55 pm

Hey there folks, I'm new here and I hope someone can lend me a hand. I'm trying to get a 600HP Fi tech to work on a 400 small block in my 84 monte Carlo I want to use the spark control feature as well. This is my set up.

MSD Pro-Billet Locked-Out Distributor 85501

MSD Blaster 2 Ignition Coil 8202

MSD Digital 6AL Ignition Controller 6425

When I hook up the black wire from the 6 pin connector I don't get any spark. I'm hooking this wire up to the white wire on the MSD box and then running the green/purple plug from my throttle body to the distributor connector. I get no spark and I don't see RPM on the Fi Tech controller. To check that I don't have any bum parts I swapped it over to not timing control, so blue wire to the (grey) tach wire on the MSD box and plugging the MSD box into the 2 wire distributor plug and then I do get spark...and an unhappy engine because its got a locked timing.

I'm not positive but I THINK that I might have a distributor that is not correct, since the Fi Tech can't "see" it. Said unit is a mag trigger and locked from MSD so I thought I was golden. I have run the engine (with a carb) on a dyno with this distributor and it worked then. I have made sure that the computer was on the right (Tach/2wire) setting each time I have done this.

Any help would be appreciated I'm very much at my wits end here.

Just a FYI, I dont know when you got the MSD product, but they are now made in China and the quality has gone way downhill ( most builders I know say it is S..T and do not use them anymore). Personally, I stick to GM branded distributors and dont use timing control with no issues. My classic is not a daily driver, so I dont care to get every once of fuel economy or performance. Just want reliability ,which I have had for 7+ years. To each his own, not trying to tell users what to do. Just explaining what has worked well with me.

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No Spark on new install.