How to fix RPM Noise (EMI) on your Fuel Injected converted engine. FiTech/Sniper/Holley

Electro Magnetic Interference caused my 1969 Pontiac GTO to break down. This video "How to fix RPM Noise (EMI) on your Fuel Injected converted engine. FiTech/Sniper/Holley" covers what causes RPM Noise, EMI, and how to prevent it from happening again.

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PARTS USED IN THIS VIDEO SERIES:

Ferrite Beads

Copper Tape for Shielding

MSD Pontiac Pro Billet Two Wire 8563

BOP Engineering Polymer CAM Gear (0.500" Diameter shaft for MSD)

MSD Phasable Rotor 84211

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This channel is all about how to's and what to watch out for, when working on your own car. Mike is at the tail end of rebuilding his Pontiac 400, which is now a Butler Performance 467, because a Roller Lifter Broke! (see link below). Also fresh off of installing a New TREMEC TKO 600 from Silver Sport Transmissions. Subscribe to watch more projects on this built, not bought, 1969 Pontiac GTO.

#DIY #musclecar #tipsandtricks

[stevebrown]

I never really had an RFI issue with my sniper but started from the get go with all of the same tricks as you and added a few: 1) CS style alternator, provides cleaner voltage to everything. 2) separate 12v switched relays to provide clean battery power to your FI computer and CD ignition. 3) shielded and grounded all sensor inputs (CTS, O2 and handheld). 4) ran all noisy wires (fan, coil, alt) on one side of the engine and the sensors on the other. 5) fuel pump ran off separate relay directly to the battery. 6) added 2 MSD capacitors, one for the FI and the other for the CD box to work as buffers against voltage spikes and stabilize voltage. Overkill? Maybe but knock on wood, I’ve never had RFI.

[jimshu]

Used a 6A cdi with my Fitech. Never had this issue. I tried the dizzy control but reverted back to counter weights after it just wasn't running right. You video on the install sheds new light on it and I may redress it this off season. Great channel.

[djsutice]

I had the same happen to me, Sniper ran great, added cdi, coil and halleffect distributor, bom instant EMI. only way i could drive the car was with aircleaner off and hood up. turns out my sparkplug wires (D.U.I) could not supress the extra power/strength of spark the cdi box was putting out, plus i had chafed one of the sparkplug wires. Swapped out to regular wires that had about 500-600 Ohms resistance per foot and all was well again.

[The_Other_Hack]

Had some RFI interference with the sniper on my 68 GTO recently when I was running it with the air cleaner off. Determined it was a bad plug wire and since it only happened with the air cleaner off believe the steel rod that screws the air cleaner on was acting as an antenna. Replaced that steel rod with a Nylon rod from McMaster. Problem solved….I think 🤞

[TomMilstead]

Any unused accessory wires should be removed from the pin connector. This lessens the chances that they will pickup interference and can always be put back in if needed!

[craigannettewallace]

I run a second earth for my fitech.
1 to body
1 to block that is earthed to frame
Run all efi wires about 4 inch away from spark plug leads if possible

[matthewenriquez]

Hey Monty out of curiosity what type of spark plug would you use for a hei distributor? I see copper and platinum does it matter?

[nicwaymire]

Is it really worth all of this pain in the ass just to have efi.... im going back to the carb to keep it simple

[johannesschroff]

Do you have some Info in your Setup?
CDI Spark Energy 100-150mJ
Sparkplugs 5kOhms
Plug wires 0.5kOhms
Min. distance ign parts to ECU wiring 0.1m
Shielding Yes/No
Oscilloscope measurements kHz resolution and stuff like that? Maybe These TBIs start working with morr distance tonignition and less Spark Energy?