Blacktop running rich/poor after upgrades - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

Josho · 03-29-2011, 03:05 PM

Ok here's the situation.. I have a 93 Nissan Silvia originally equipped with a redtop sr20det. The car ran perfect stock. Now I have a s13 Blacktop with a built head, gt2871r turbo, walbro 255, stock injectors, maf and a stock Blacktop ecu. Now obviously the car would run a little rough but it's still driveable. The only problem it gives me is every now and then it'll shut off when I let off the gas and come to a stop.

Ok, so when I purchased the blacktop(already built) I also bought this guys tuned ecu. He had it tuned for the same mods including the turbo. They only mods I was missing was the z32 maf and 850cc injectors(which his ecu was tuned for as well). So I bought a new maf and injectors and installed them and the tuned ecu. With that installed the car cranks up just fine but rins very rough. I can rev it up as high as I want but it breaks up real bad. I swapped my maf with a known good one and it runs the same.. Any suggestions? Could the ecu be bad? I also have a coolant temp sensor out of a redtop, not sure if that matters.

03-29-2011, 03:05 PM	#1
Josho Zilvia Junkie Join Date: Mar 2010 Location: AL Posts: 310 Trader Rating: (7) Feedback Score: 7 reviews	Blacktop running rich/poor after upgrades Ok here's the situation.. I have a 93 Nissan Silvia originally equipped with a redtop sr20det. The car ran perfect stock. Now I have a s13 Blacktop with a built head, gt2871r turbo, walbro 255, stock injectors, maf and a stock Blacktop ecu. Now obviously the car would run a little rough but it's still driveable. The only problem it gives me is every now and then it'll shut off when I let off the gas and come to a stop. Ok, so when I purchased the blacktop(already built) I also bought this guys tuned ecu. He had it tuned for the same mods including the turbo. They only mods I was missing was the z32 maf and 850cc injectors(which his ecu was tuned for as well). So I bought a new maf and injectors and installed them and the tuned ecu. With that installed the car cranks up just fine but rins very rough. I can rev it up as high as I want but it breaks up real bad. I swapped my maf with a known good one and it runs the same.. Any suggestions? Could the ecu be bad? I also have a coolant temp sensor out of a redtop, not sure if that matters. Last edited by Josho; 05-02-2011 at 07:02 PM..