RomulanS13

I just did a black top sr20det swap on my 89 hatch. Wiring specialties harness and lower trans harness. I noticed a fine white sediment in my gas tank chassis had been sitting over 2 years prior to me owning it. I wiped down the tank the most i could replace with and isr pump amd got the car drivable. I didnt notice but the hesitation progressivly got worse the more i drove it.

I replaced the fuel filter with a fresh 300sx filter and like the tank it was full of white fine powdery chalky powder when it dries. So I decided to replace the fuel pump with a genuine walbro 255 old pump strainer was caked this stuff. Drove the car and same thing this time it sounded better but still has hesitation under load with boost 2psi or higher i havent even gone over 3 psi as it falls on its face and hesitates and sounds like a really bad missfire until i let off.

Checked for codes and it came out with code 34 knock sensor. I inspected the harness looks good so i replaced the knock sensor code went away but i get 55 to my knowlegde is no fault.

Checked for leaks but havent really done a real leak down test hust a visual on couplers and checked tightness on clamps. Im at a loss right now though i had it but back to square one. HELP.

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