Can't rev past 3K - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

muskrat · 04-09-2003, 07:55 AM

1992 240sx stock.

When I was driving it home after buying it I could not rev the car past 3000rpm, the motor was missing horribly and it needs a new timing chain, so I didn't mind the whole not being able to rev past 3K thing.

Yesterday I was reading some posts about my HUD and saw some other people mention this thing about not revving over 3K something.

Here's the thing. My engine is being replaced saturday with an 80K mile 1991 engine/trans, will this fix the problem with the revving or is this a problem in the computer or other component?

TIA

AKADriver · 04-09-2003, 08:05 AM

Sounds like a fuel problem... check the fuel pump and filter.

Foxcolt · 04-09-2003, 08:37 AM

10 bucks says your mafs is disconnected

uiuc240 · 04-09-2003, 08:57 AM

or the MAFS is toast. to check:

start car
let idle
unplug MAFS
if idle smooths out, MAFS is toast

Eric

muskrat · 04-09-2003, 10:07 AM

Gotta get use to the initials that people use... are y'all talking about the mass air sensor thing? Would this be on the engine being swapped in? (complete engine from car to car) How much is a new one?

uiuc240 · 04-09-2003, 10:46 AM

Mass Air Flow Sensor. It *should* be with the engine you bought, but it might not. Did you get the intake tube all the way to the airbox? The MAFS is connected to the airbox with rivets.

Eric

muskrat · 04-09-2003, 11:59 AM

Quote:

Originally posted by uiuc240
Mass Air Flow Sensor. It *should* be with the engine you bought, but it might not. Did you get the intake tube all the way to the airbox?

Like I said, the engine I "got" is still in a car, it will be a swap from car to car, so I will have everything.

uiuc240 · 04-09-2003, 02:28 PM

:thumbsup:

04-09-2003, 07:55 AM	#1
muskrat Leaky Injector Join Date: Feb 2003 Location: Eastern NC Age: 48 Posts: 137 Trader Rating: (0) Feedback Score: 0 reviews	Can't rev past 3K 1992 240sx stock. When I was driving it home after buying it I could not rev the car past 3000rpm, the motor was missing horribly and it needs a new timing chain, so I didn't mind the whole not being able to rev past 3K thing. Yesterday I was reading some posts about my HUD and saw some other people mention this thing about not revving over 3K something. Here's the thing. My engine is being replaced saturday with an 80K mile 1991 engine/trans, will this fix the problem with the revving or is this a problem in the computer or other component? TIA

04-09-2003, 08:37 AM	#3
Foxcolt Zilvia FREAK! Join Date: Apr 2002 Location: Northern VA Posts: 1,264 Trader Rating: (0) Feedback Score: 0 reviews	10 bucks says your mafs is disconnected __________________ Driftec www.midatlantic240sx.com

04-09-2003, 08:57 AM	#4
uiuc240 Nissanaholic! Join Date: Apr 2002 Location: Naperville, IL Age: 46 Posts: 2,093 Trader Rating: (0) Feedback Score: 0 reviews	or the MAFS is toast. to check: start car let idle unplug MAFS if idle smooths out, MAFS is toast Eric __________________ 2002 Mazda Protege5 1989 S13 w/SR20DET (sold)

04-09-2003, 10:46 AM	#6
uiuc240 Nissanaholic! Join Date: Apr 2002 Location: Naperville, IL Age: 46 Posts: 2,093 Trader Rating: (0) Feedback Score: 0 reviews	Mass Air Flow Sensor. It should be with the engine you bought, but it might not. Did you get the intake tube all the way to the airbox? The MAFS is connected to the airbox with rivets. Eric __________________ 2002 Mazda Protege5 1989 S13 w/SR20DET (sold)

04-09-2003, 02:28 PM	#8
uiuc240 Nissanaholic! Join Date: Apr 2002 Location: Naperville, IL Age: 46 Posts: 2,093 Trader Rating: (0) Feedback Score: 0 reviews	:thumbsup: __________________ 2002 Mazda Protege5 1989 S13 w/SR20DET (sold)

04-09-2003, 08:05 AM	#2
AKADriver Post Whore! Join Date: May 2002 Location: Springfield, VA Age: 43 Posts: 3,517 Trader Rating: (1) Feedback Score: 1 reviews	Sounds like a fuel problem... check the fuel pump and filter.

04-09-2003, 10:07 AM	#5
muskrat Leaky Injector Join Date: Feb 2003 Location: Eastern NC Age: 48 Posts: 137 Trader Rating: (0) Feedback Score: 0 reviews	Gotta get use to the initials that people use... are y'all talking about the mass air sensor thing? Would this be on the engine being swapped in? (complete engine from car to car) How much is a new one?