That wouldn't fix the issue. The issue is the cycling as pointed out by Chris@AMS stating it's more of an issue with higher mileage cars (relatively) and lKoRTy talking about cycling reliability. Don't swap them and think that this issue is a thing of the past.

If a relay is teetering on the setpoint required for it to switch over and switch back, it can cycle EXTREMELY fast. Each cycle produces an almost invisible arc (or spark in other words) that just adds heat every time. Without sufficient time inbetween these cycles, the heat gets hot enough to burn up the connection and either cause an open from the horrible pitting and charring or cause a short because it fused together in the heat (or heating up the insulation on the coils inside the relay could cause it to just stop cycling).

I've seen quite a few fires (non-automotive) and electrical grounds from industrial-sized relays.

As far as a permanent solution and getting Mitsubishi to cover this... I don't know how to prove it other than too many people bringing in blown relays for it to be considered an isolated incident.

Edit: I wouldn't mind popping in a new relay every few oil changes, but not at $24 a pop.

 

Jeez, yet another issue with this car lol.

 

^ seriously

 

Here's an idea:

Since the Hi Beam/Horn Relay and the Fuel Pump relay are exactly the same (and we rarely use the hibeam or horn), how about we just rotate the horn, the highbeam, and the fuel pump relay every oil change? This will also lengthen the life of the relays since you are rotating them around. Just a thought.

 

I stumbled on the following article while googling some other unrelated EVO keywords. I doubt I'll ever get around to trying his trouble-shooting suggestions...but maybe some other forum members have done this...or would be willing to test the voltage as he describes.

Original Blog-Post from AMS Racing Blog:
http://www.amsracingblog.amsperforma...r-to-run-lean/

A quick summary - the Post indicates a possible issue that would affect the fuel system of the car and make the car run very lean, and possibly cause engine damage. The issue is related to the stock fuel pump voltage switching relay.

And he describes two ways to check for this condition. One needing a wideband A/F guage, and the other using a volt meter.

Maybe folks on this forum can confirm his theories and findings...I've got a EVO X GSR - so I'm very interested to know if there's some problem which results in engine damage...

 

theres a sticky in the "Evo X Engine / Turbo / Drivetrain" section. i'm surprised this isn't the number one topic being discussed.

i remember them saying something about this issue happens on "higher milage" Xs, i want to know what that might be...

edit, i meant Evo X Engine / Turbo / Drivetrain section.

 

bump for more discussion about this...

 

We had a car the other day with this issue

 

i found the thread thanks to ams facebook. i thought more people were attentive to this but i guess not..

crazy scary situation though i hope there's gonna be a fix...but so far the only recommendations out there is hard wiring the fuel pump as chris says

 

hope mitsu have a TBS for this! not cool!

 

same prblm here 25k

 

Those who have encountered this problem, what are the driving symtoms from the faulty fuel pump relay?

 

Those who have encountered this problem, what are the driving syntoms from the faulty fuel pump relay?

 

Gee thanks for clarifying. Obviously I'm already in the process of getting the real solution, a wideband.

 

how do we know if our car is doing that