Need help ASAP - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

LilRebel57 · 02-15-2017, 08:19 PM

i have a 1995 s14 with an S13 sr20. Yesterday out of nowhere it wouldn't rev past 4500 RPM and then it slowly decreased how far it would rev until it died on me. I had it towed and in the morning it fired right up and had no issues revving all the way out. I then replaced the fuel pump today thinking the pump may have gone bad and it didn't fix it. After I tried a new battery thinking maybe it was because it wasn't getting enough voltage from the battery but that didn't work either. If I give it like 70-100% throttle it sputters but if I hold it at like 50% throttle it will rev all the way to 6500. But if I give it full throttle it only revs to 4500.. It's very weird and I have no clue what to do. Any help is very much appreciated

jedi03 · 02-16-2017, 07:34 AM

tps maybe?

LilRebel57 · 02-17-2017, 08:51 AM

It's not the TPS. It acts as if it hits the rev limiter prematurely under a certain load. Does anyone think maybe bad MAF?

japslapsilvia · 02-17-2017, 09:12 AM

pull codes from ECU sounds like Bad Knock sensor.

DiscountPirate · 02-21-2017, 12:16 AM

It is rarely ever the maf. What about vac leaks or a hose that popped off?

LilRebel57 · 02-21-2017, 11:07 PM

I figured it out. Bad Alternator. Just put a KA on there and she runs like a dream now.

DiscountPirate · 04-17-2018, 06:06 PM

SR's eat alternators for some reason

02-15-2017, 08:19 PM	#1
LilRebel57 Leaky Injector Join Date: Nov 2016 Location: Utah Posts: 139 Trader Rating: (0) Feedback Score: 0 reviews	Need help ASAP i have a 1995 s14 with an S13 sr20. Yesterday out of nowhere it wouldn't rev past 4500 RPM and then it slowly decreased how far it would rev until it died on me. I had it towed and in the morning it fired right up and had no issues revving all the way out. I then replaced the fuel pump today thinking the pump may have gone bad and it didn't fix it. After I tried a new battery thinking maybe it was because it wasn't getting enough voltage from the battery but that didn't work either. If I give it like 70-100% throttle it sputters but if I hold it at like 50% throttle it will rev all the way to 6500. But if I give it full throttle it only revs to 4500.. It's very weird and I have no clue what to do. Any help is very much appreciated

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02-16-2017, 07:34 AM	#2
jedi03 Nissanaholic! Join Date: Jul 2008 Location: albuquerque Posts: 1,784 Trader Rating: (8) Feedback Score: 8 reviews	tps maybe?

02-17-2017, 08:51 AM	#3
LilRebel57 Leaky Injector Join Date: Nov 2016 Location: Utah Posts: 139 Trader Rating: (0) Feedback Score: 0 reviews	It's not the TPS. It acts as if it hits the rev limiter prematurely under a certain load. Does anyone think maybe bad MAF?

02-21-2017, 12:16 AM	#5
DiscountPirate Zilvia Member Join Date: Jul 2016 Location: SoCal Posts: 189 Trader Rating: (0) Feedback Score: 0 reviews	It is rarely ever the maf. What about vac leaks or a hose that popped off?

02-21-2017, 11:07 PM	#6
LilRebel57 Leaky Injector Join Date: Nov 2016 Location: Utah Posts: 139 Trader Rating: (0) Feedback Score: 0 reviews	I figured it out. Bad Alternator. Just put a KA on there and she runs like a dream now.

04-17-2018, 06:06 PM	#7
DiscountPirate Zilvia Member Join Date: Jul 2016 Location: SoCal Posts: 189 Trader Rating: (0) Feedback Score: 0 reviews	SR's eat alternators for some reason