Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum - View Single Post - Bear with me. 96 stock KA cranks but no start

R3b · 10-01-2016, 07:37 AM

Not trying to derail and was going to make a thread but also having similar issues, ecu is reading 55 and everything on my block is new after rebuilding it. New coolant temp, iacv, 02, swapped a buddies working tps/my old was fine and had correct voltage, timing is good, fuel pressure is solid and maf is not new but did have an issue rewiring into my wiring specialties harness.

What happened was I wired the sub harness thinking it was to oem but WS purposly switches the ground middle wire in the stock ka harness to the outside. So when I tried starting the car, it melted the wire a bit and my ecu burnt up and wasnt getting power. Talked to WS, didnt want to hear it from me and were 0 help and not sympathetic even though its labeled as OEM and the only thing the describes was different was the s14 02 sesnor connector vs the single one.

Wires in the harness are fixed, doesnt look like its grounding out or bad connection, getting proper voltage on ignition and idle.

Im lost, same thing as you. Will start up fine, get good afrs but soon as I go to back out and rev past 2k because of my new puck clutch it either bogs and runs rich in the 10-10.3s, hunts then idles fine or it will rev fine but soon as I go drive 10 feet out in first it bogs, cant even rev past 1k and is undrivable since I cant even let off the clutch at so low rpms. Also noticed I cant bring down my idle when warm past 900950rpms. Tps voltage is good and IACV is maxed out on the idle screw, can only make it go higher. Cant get it to 750 for the proper timing but I am reading 20 BTDC on nissan datascan on my laptop.

Thinking its ecu because it did get burnt at pinout 4 with is 12v igition and didnt turn on. I did clean off the connection and solder in a better connection and turned on fine. If its not that its a leak even though I checked a million times and deleted everything egr and pcv related. Then lastly is some type of ground on WS harness/body harness or bad e85 in the tank since rebuilding the gas has been sitting for about 3-4 months, not sure if bad corn will make it run this pig rich with a fresh tune for 1000cc. Fuel rail isnt leaking and injectors are spraying good when cranked over.

10-01-2016, 07:37 AM	#14
R3b Zilvia Junkie Join Date: Mar 2015 Location: South FL Age: 28 Posts: 581 Trader Rating: (0)	Not trying to derail and was going to make a thread but also having similar issues, ecu is reading 55 and everything on my block is new after rebuilding it. New coolant temp, iacv, 02, swapped a buddies working tps/my old was fine and had correct voltage, timing is good, fuel pressure is solid and maf is not new but did have an issue rewiring into my wiring specialties harness. What happened was I wired the sub harness thinking it was to oem but WS purposly switches the ground middle wire in the stock ka harness to the outside. So when I tried starting the car, it melted the wire a bit and my ecu burnt up and wasnt getting power. Talked to WS, didnt want to hear it from me and were 0 help and not sympathetic even though its labeled as OEM and the only thing the describes was different was the s14 02 sesnor connector vs the single one. Wires in the harness are fixed, doesnt look like its grounding out or bad connection, getting proper voltage on ignition and idle. Im lost, same thing as you. Will start up fine, get good afrs but soon as I go to back out and rev past 2k because of my new puck clutch it either bogs and runs rich in the 10-10.3s, hunts then idles fine or it will rev fine but soon as I go drive 10 feet out in first it bogs, cant even rev past 1k and is undrivable since I cant even let off the clutch at so low rpms. Also noticed I cant bring down my idle when warm past 900950rpms. Tps voltage is good and IACV is maxed out on the idle screw, can only make it go higher. Cant get it to 750 for the proper timing but I am reading 20 BTDC on nissan datascan on my laptop. Thinking its ecu because it did get burnt at pinout 4 with is 12v igition and didnt turn on. I did clean off the connection and solder in a better connection and turned on fine. If its not that its a leak even though I checked a million times and deleted everything egr and pcv related. Then lastly is some type of ground on WS harness/body harness or bad e85 in the tank since rebuilding the gas has been sitting for about 3-4 months, not sure if bad corn will make it run this pig rich with a fresh tune for 1000cc. Fuel rail isnt leaking and injectors are spraying good when cranked over.