wesismyhero
01-29-2016, 11:56 PM
I have a 91 240sx with a redtop Sr20det swap. The car starts fine and idles perfect until it gets warmed up. Then it sputters and dies unless you give it gas. When you give it gas, it is so rich it will burn your eyes. It also will not rev about 5k in neutral. When you drive it, it has zero power. Floored it will barely do 30 mph on flat ground. The car has 550cc injectors so I assumed it was running rich and hitting fuel cut. I ordered a Aem Uego and a AFC Neo and installed them. Before I messed with the Afc, I took some baseline readings with the Uego. When you give the car fuel, it reads around 13 but when you let off it goes to 16-17 and dies. I've replaced Maf, o2 sensor, two sets of NGK spark plugs, checked compression, confirmed timing, set voltage on the tps, set fuel pressure, checked for vacuum leaks, drained all fuel and replaced it with fresh, checked voltage on the alternator, new fuel filter, replaced almost every gasket, new fuel pump, new knock sensor, on and on. The only code the ECU shows is 55. I have no clue what is left to check. Any ideas or help would be greatly appreciated.
Mods are : Brian Crower 262 cams, Freddy manifold, Sard 550cc injectors and fuel rail, Isis front mount, Isis turbo manifold, Isis turbo elbow, TRust downpipe, Fujita short ram intake, Wiring specialties engine and trans harness, Isis FPR, Chase Bays fuel lines
Mods are : Brian Crower 262 cams, Freddy manifold, Sard 550cc injectors and fuel rail, Isis front mount, Isis turbo manifold, Isis turbo elbow, TRust downpipe, Fujita short ram intake, Wiring specialties engine and trans harness, Isis FPR, Chase Bays fuel lines