FINALLY....the 255lph Walbro Fuel Pump is install!! But man....I sure did cause my own HEADACHES in figuring out the wiring.
I started this past Friday purchasing 10, 12 and 14 gauge wiring along with a 5pin relay (in which I think one could just use a 4pin but anyway...) and some electrical connectors. Much to my surprise, I was able to remove the fuel tank with minimal issues. Except for not being able to get the 17mm nuts off for the fuel tank straps; as a result I just removed the four 14mm bolts opposite to the 17mm nuts on the fuel tank straps to the chassis. Even the seven screws holding the fuel hanger in place all came off with no issues (no rust, shearing, stripped, etc). I also took the time to sand down the hardlines coming from the hanger and paint them black with high temp engine paint.
My fuel tank after dropping it from the car:
Old fuel pump out of the tank on the hanger:
Old fuel pump:
New Walbro 255lph fuel pump:
Walbro 255lph FP installed on the FP hanger, wired up and ready to be place back in the tank:
Now comes the part where I did a damn 360deg head spin trying to figure out what hell's going on in my life....all because I thought I was suppose to "hear" the fuel pump come on when I turn the ignition in the "ON" position (engine not yet cranked/started). Clearly, I'm a class-A bum for not knowing that I should have cranked/turned on the engine and only "then" will ignition power from the stock harness get sent to the 5pin relay which then triggers the induction coil between pins 85 and 86. As a result, this would signal the relay to flip the switch from pin 87A to just 87 which then links it to 30 where power comes straight from the battery (w/ a 20amp fuse of course).
Let me tell you....the savagery I went through (between the jumper wire being placed in the wrong terminals, turning the key to the "ON" position and thinking I'm suppose to hear the FP turn on....as forum-guys tell you the 255 FP is "loud", riding my bike to Walmart at 1am in the morning to buy a more electrical connectors and fuses, etc)....sigh....it was a frustration like never before. I had all my install/wiring of the FP done by 6pm Saturday until I started thinking there was a problem because my stock harness was not sending ignition power to the relay/FP once I turn the key to the "ON" position. It got to the point where I called SideWinderGX Sunday and talked on the phone for damn near an hour trying to figure out this damn shit. He then suggested I just cut the yellow wire by the stock FP resistor/relay, which I did. He said its no problem to run the aftermarket relay and bypass the stock unit however, he said I can just cut the yellow wire which then would no longer send a signal to trigger the stock relay for 9v therefore, you'd run straight 12volts all the time; as a result, just run off the stock wiring without the re-wiring/5pin relay shit. And so....I did that. But with me thinking I had a problem where my stock ignition wire going to the FP was not sending power once I on the ignition (no start), I still didn't get the car to start.
Sigh
AND THEN....something hit me (probably frustration and not giving a f**k anymore) and said, just trying cranking/starting the car for a few seconds and see what happens....and the friggin car starts right up. Then I said to myself, "well holy shiet, what the f**k is this....where was the problem....shiet....there was no problem....you have to crank it, THEN the FP gets ignition power and the pump turns on". Makes sense seeing as theres no reason for the FP to get power/be on when the engine is not running or trying to start, right??
In any case, I blew my nuts over this shiet from 6pm till 4am Saturday into Sunday morning....woke up around 12noon Sunday, thought to myself, I am a disgrace to the Supra community and got right back into struggling on this problem (for no reason) till I finally figured it out around 6pm Sunday. Now you see why I was so hesitant to get into this FP thing??....its new to me and I've never dealt with this before; plus, shit is old/rusty and things might break in the process and I can't wire shit up to save my left nut. Low and behold, the install went smooth with no problems and the wiring went smooth as well (I just needed to "start" the car....there was no problem from the very beginning) and now my 255lph Walbro FP is INSTALLED!
Big thanks to SideWinderGX for guiding me through this....and sorry for calling/bothering him up twice to whine about my wiring BS that I caused....in my own head. Lol
**By the way, I'm running DAMN rich (nothing but 10afrs) and am not getting the power I was seeing before this 255 FP install. Before I would sometimes see afrs in the 11s when doing pulls with the stock FP. This tells me at 15psi w/ a 57trim, my stock FP was maxed out....so much such that I would occasionally see the afrs in the 11s....this FP upgrade was much needed. So the next thing I will be installing is my Apexi SAFC NEO to lean myself out to around 11 to 11.5 afrs; then I'll hit the dyno, 1/4mile track and hopefully the Toronto Supra Meet coming up this August.**
you can always go get it dyno tuned with the safc and give us dyno sheets.
