demoray

I completed the rewiring of the plug and install of the new MFRU and went for a multi-hour celebratory blat today.

The replacement relay and wiring harness parts arrived. I'm tracing out the wiring right now. It appears that the output from pin 4 goes to the 15amp fuse for the fuel pump, then to the fuel pump. As I'm disassembling the plug, it appears the crimp wasn't done well and it was slightly pushed back into the plug. My guess is that there was intermittent contact, which could lead to heat & spark.

Relay unit ordered through Rimmer Bros and a plug kit from another UK shop as I couldn't find a US shop with the wiring harness that would sell less than 2000 units or would take 4 months to arrive. So... I'm out for the upcoming 7 track day.

Thanks, I'd appreciate that! These are the only numbers I can find on the unit. BCS YWB 100970 4922 PBT-GF30 PA6-GF10/GB20

Well I found why I was struggling to debug the fuel pump in my CSR. According the the MFRU wiring diagram @Croc posted some time back, the MFRU fuel pump output pin burnt out. I'm not sure what caused this to go, I would have expected this to burn the fuse. So... Now to find where to order a replacement one of these.

Any idea what a set are going to run?

For those following along, my CSR had a Walbro grj235.

Well, shit. The fuel pump in my CSR doesn't have the same connections as the one from Rimmer Brother.

The connector has tabs on both sides that I couldn't see until I partially lifted the fuel pump out of the tank.

Working on replacing mine... How do you take this connector off? For context, it's the one circled on red on the second photo.

In the SCCA, it boils down to your tires. If you are running 200TW tires, XU. Otherwise, I think you're stuck in A-Mod due to the super charger. The current rules are specified here: https://cdn.connectsites.net/user_files/scca/downloads/000/078/494/2026 Solo Rulebook Feb.pdf?1770664112

@AeroCat Tell us about the Aero package on your other 7...

Yep. I found the most recent CSR fuel pump thread, as well as some of your previous posts that have additional information. I'll be ordering a replacement in the morning.

Sigh. Fuel pump woes at my first autocross with the 7. At least I'm within the Hagerty Drivers Club included flat bed towing range.

Reminds me of a song... It's like too much money, there's no such thing. It's like a girl too pretty with too much class. Being too lucky, a car too fast. No matter what they say, I've done, but I ain't never had too much fun.