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Save Your Main Relay! FM Fuel Pump Rewire Kit (FM Live)

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What do our Fuel Pump Rewire Kit and The Targa Newfoundland have in common? This week on FM Live, Keith Tanner discusses the basics of what our rewire kit is, how it works, as well as a little info on how this simple part could have saved him the lead in a certain five day long rally. Your Main Relay has a lot of responsibility and carries current to many vital systems in your car. Age, corrosion and aftermarket parts can put a huge strain through the relay, causing it to overheat and fail. Our Fuel Pump Rewire Kit adds a separate fuse and relay for the fuel pump, taking some of the pressure off the stock parts.
FM Fuel Pump Rewire Kit:
flyinmiata.com...
Upgraded NA/NB Main Relay:
flyinmiata.com...
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Опубликовано:

22 авг 2024

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Комментарии : 22

@chrisschneider7727 Год назад

This is always one of the biggest things to update if you're seeking +200hp. Old wiring and thin diameter wire is the main cause of high resistance.

@FlyinMiataVideo Год назад

Definitely a good preventative upgrade for higher horsepower cars!

@frogers58 Год назад

Yep, know this problem very well. '05 MSM, 285hp. Over a 18mo period went through a dozen relays. At one point had a bag in the glove box with 5 or 6 that I would bend back in place so they made contact. My symptom was that the tach would swing all the way to 9K at key on then hear a relay clicking as I cranked it. Of course it wouldn't start, so I swap the relay. Tried the 40A and 80A versions. Eventually the socket in the relay box melted and warped. Pulled the relay box and cut off all the burned wires. The double crimp on the relay I separated into two circuits and added a second relay. Been a few years and the problem hasn't come back. I think the last time it happened was on a FM Summer Camp tour. I probably ended up with something similar to what Andrew came up with.

@michaelh.9866 Год назад

Thanks, Keith!

@merlyn2121 Год назад

Ooh. Wonder if Miata Mike or Brandon are going to do an install video. If I ever replace my fuel pump I'll be adding one of these.

@FlyinMiataVideo Год назад

We can add that suggestion to the list! Thanks!

@merlyn2121 Год назад

@@FlyinMiataVideo I don't think people know how valuable your install videos really are.

@starstar5657 3 месяца назад

Don't put a spare in the gloves box, replace it and keep the old in the glove box if you must and forget about it. they generally last over 20 years. my current one is still going after 25 years.

@FlyinMiataVideo 3 месяца назад

Something is better than nothing!

@ricepony33 Год назад

I’ve had the main relay fail twice on my 94 in short succession. Both resulting in a tow… really made the car feel old.

@FlyinMiataVideo Год назад

It's a right of passage for owners of older Miatas.

@calebburt9632 Год назад

My fuel pump relay went out a while back. I ended bypassing it with a little wire and it has been fine ever since

@FlyinMiataVideo Год назад

Not a great idea, as you want the fuel pump to cut out if the engine stops. Otherwise you've got a very high risk of fire in a collision or if a line breaks.

@MrSprintcat Год назад

First on race day.

@RobertMeany Год назад

I was wondering if you guys have any experience with ND2 fuel pumps and related electrical? I recently put in a supercharger kit from Fab9, which included upgraded injectors and pump.. While tuning, we're having issues with fuel starvation at high RPMs and I'm wondering if perhaps the stock wiring/relay is not up to the task...

@FlyinMiataVideo Год назад

Sorry, we don’t. We used factory pumps in our V8 conversions and amazingly they were up to the job. Direct injection engines start acting weird when you get past 25% duty cycle on the injectors, which will happen at high rpm first.

@mars-lv9xo Год назад

Could this be the reason my 91 engine dies randomly? I’ve gotten towed 3 times now in the last month. Car will drive fine & suddenly the RPM needle will drop to zero. Car will roll to a stop & then wont start again. Really frustrating because I’m always wondering if I can make it to and from home.

@FlyinMiataVideo Год назад

Possibly. When the main relay fails, it cuts power to the ECU so the car stops running like someone turned off the key. Most other failures have the engine sputtering to a stop. They don't usually come back again, but it's possible letting the relay cool might bring it back. It's certainly worth investigating.