KA24DE Hesitation - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

D1_King · 04-23-2007, 03:12 PM

ya well when i start my car it starts up good, kinda idles up and down (100rpm or so). when i slowly step on the gas it starts to hesitate around 2000-2500rpm and its good after that. i thought it was bad gas so i ran the gas out and refueled it with new gas. could the fuel filter be clogged or the fuel pump, and also would the timing be off?

Z U L8R · 04-23-2007, 03:15 PM

mass air flow sensor @_@

D1_King · 04-23-2007, 03:23 PM

ok ill check on that.

BusBOy · 04-24-2007, 01:34 AM

off the topic.. but i did had the same problem as u did...
but anyways, i now have a diffirent problem, my steering rack boot is rip and im planing on replacing it myself. i kno i can search and look for it but im too lazy, and top of that since i got the car my rpm doesnt work..
please help

kdashy · 04-24-2007, 01:40 AM

Maybe theres a leak in the intake or vacuum line on the intake past the MAF.

Unmetered air could cause problems like that until high rpms.

SnakeKack · 04-24-2007, 02:27 AM

I know it is not a 240 but my old 1990 300zx Z32 NA did that. it was the Knock Sensor. Couldn't hurt to pull ECU codes. 34 is knock sensor I believe.

MrMigs · 04-24-2007, 04:19 AM

I say check the MAF, check the intake for leaks, and check exhaust for leaks.

D1_King · 04-25-2007, 09:56 PM

word i get to that. but why would the knock sensor make the car hesitate?

vincem · 04-25-2007, 10:08 PM

i would like to know the answer also... why would the knock sensor do this?

wannabe_drifter · 05-13-2007, 01:30 PM

I got a similar problem
Lets us know when you get it alright

D1_King · 05-26-2007, 01:58 PM

yep well it still is messing up so. it have gotten better know that i reconnected my PCV system. i was stupid and took it off when i was taking all the emissions off.

the terrible one · 05-26-2007, 02:16 PM

check your maf and vacuum lines. check your intake for any signs of cracking in the tube or holes even. cracks before the maf sensor is nothing. after the maf sensor could cause some problems.

why would it be a knock sensor??? knock sensors detect pinging or knocking.
d1 king- are you experiencing any of that and you forgot to state that?
only thing knock sensors do is retard the timing when the engine detects pinging or a knocking.

junkey311 · 05-26-2007, 05:39 PM

check vacuum lines between the engine and firewall, and the EGR vacuum lines. better yet, you might as well replace them, because they are old and hard. and will leak eventually if they arent already. most common place for a vacuum leak

ka24kingmannyd · 05-26-2007, 09:44 PM

samething with me i swaped a sohc to a dohc and everything is good but i try to rev. it but its bogs out or something i dont know if its the ecu cause i have a bunch of ecu's but i dont know if their for the dual cam? help anyone....

jskateborders · 05-27-2007, 01:09 AM

check the spark plugs.

airhead · 05-27-2007, 01:24 AM

im having the same problem but how can i check for the vacum leak ?

BusBOy · 10-30-2007, 04:16 PM

my car was heisitating too when my speedamotor wasnt working.. ever since i replace it, it ran like a stallion..

supreme_1 · 11-04-2007, 09:09 PM

so were you able to find out what the problem was? my car just started doing this.

i have all those signs except my car has a slight knock, and the exhaust smells like rotten eggs.

04-23-2007, 03:12 PM	#1
D1_King Join Date: Feb 2006 Location: Charlotte Posts: 33 Trader Rating: (0) Feedback Score: 0 reviews	KA24DE Hesitation ya well when i start my car it starts up good, kinda idles up and down (100rpm or so). when i slowly step on the gas it starts to hesitate around 2000-2500rpm and its good after that. i thought it was bad gas so i ran the gas out and refueled it with new gas. could the fuel filter be clogged or the fuel pump, and also would the timing be off?

04-24-2007, 01:40 AM	#5
kdashy Zilvia FREAK! Join Date: Aug 2004 Location: Been here longer than you bitch! Posts: 1,296 Trader Rating: (0) Feedback Score: 0 reviews	Maybe theres a leak in the intake or vacuum line on the intake past the MAF. Unmetered air could cause problems like that until high rpms. __________________

04-24-2007, 04:19 AM	#7
MrMigs Nissanaholic! Join Date: Jul 2001 Location: San Gabriel, CA Age: 41 Posts: 1,675 Trader Rating: (5) Feedback Score: 5 reviews	I say check the MAF, check the intake for leaks, and check exhaust for leaks. __________________ Drifting is just a compromise between you and your car.

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04-23-2007, 03:15 PM	#2
Z U L8R Zilvia FREAK! Join Date: Jan 2007 Location: Georgia Age: 43 Posts: 1,194 Trader Rating: (0) Feedback Score: 0 reviews	mass air flow sensor @_@

04-23-2007, 03:23 PM	#3
D1_King Join Date: Feb 2006 Location: Charlotte Posts: 33 Trader Rating: (0) Feedback Score: 0 reviews	ok ill check on that.

04-24-2007, 01:34 AM	#4
BusBOy Leaky Injector Join Date: Apr 2007 Location: killa cali Posts: 76 Trader Rating: (0) Feedback Score: 0 reviews	off the topic.. but i did had the same problem as u did... but anyways, i now have a diffirent problem, my steering rack boot is rip and im planing on replacing it myself. i kno i can search and look for it but im too lazy, and top of that since i got the car my rpm doesnt work.. please help

04-24-2007, 02:27 AM	#6
SnakeKack Zilvia Junkie Join Date: Dec 2005 Location: Florida Age: 37 Posts: 306 Trader Rating: (6) Feedback Score: 6 reviews	I know it is not a 240 but my old 1990 300zx Z32 NA did that. it was the Knock Sensor. Couldn't hurt to pull ECU codes. 34 is knock sensor I believe.

04-25-2007, 09:56 PM	#8
D1_King Join Date: Feb 2006 Location: Charlotte Posts: 33 Trader Rating: (0) Feedback Score: 0 reviews	word i get to that. but why would the knock sensor make the car hesitate?

04-25-2007, 10:08 PM	#9
vincem Leaky Injector Join Date: Sep 2005 Location: san luis obispo, CA Age: 37 Posts: 56 Trader Rating: (0) Feedback Score: 0 reviews	i would like to know the answer also... why would the knock sensor do this?

05-13-2007, 01:30 PM	#10
wannabe_drifter Zilvia Member Join Date: Jul 2006 Location: Québec, Canada Age: 41 Posts: 245 Trader Rating: (0) Feedback Score: 0 reviews	I got a similar problem Lets us know when you get it alright

05-26-2007, 01:58 PM	#11
D1_King Join Date: Feb 2006 Location: Charlotte Posts: 33 Trader Rating: (0) Feedback Score: 0 reviews	yep well it still is messing up so. it have gotten better know that i reconnected my PCV system. i was stupid and took it off when i was taking all the emissions off.

05-26-2007, 02:16 PM	#12
the terrible one Zilvia Member Join Date: Jan 2006 Location: san jose Posts: 190 Trader Rating: (0) Feedback Score: 0 reviews	check your maf and vacuum lines. check your intake for any signs of cracking in the tube or holes even. cracks before the maf sensor is nothing. after the maf sensor could cause some problems. why would it be a knock sensor??? knock sensors detect pinging or knocking. d1 king- are you experiencing any of that and you forgot to state that? only thing knock sensors do is retard the timing when the engine detects pinging or a knocking.

05-26-2007, 05:39 PM	#13
junkey311 Join Date: Apr 2007 Location: fullerton, ca 92835 Age: 40 Posts: 25 Trader Rating: (0) Feedback Score: 0 reviews	check vacuum lines between the engine and firewall, and the EGR vacuum lines. better yet, you might as well replace them, because they are old and hard. and will leak eventually if they arent already. most common place for a vacuum leak

05-26-2007, 09:44 PM	#14
ka24kingmannyd Leaky Injector Join Date: Nov 2006 Location: santa ana ca Age: 36 Posts: 115 Trader Rating: (0) Feedback Score: 0 reviews	samething with me i swaped a sohc to a dohc and everything is good but i try to rev. it but its bogs out or something i dont know if its the ecu cause i have a bunch of ecu's but i dont know if their for the dual cam? help anyone....

05-27-2007, 01:09 AM	#15
jskateborders Zilvia FREAK! Join Date: Apr 2007 Location: Tucson AZ Age: 36 Posts: 1,258 Trader Rating: (5) Feedback Score: 5 reviews	check the spark plugs.

05-27-2007, 01:24 AM	#16
airhead Nissanaholic! Join Date: Dec 2005 Location: IE/OC Posts: 1,885 Trader Rating: (32) Feedback Score: 32 reviews	im having the same problem but how can i check for the vacum leak ?

10-30-2007, 04:16 PM	#17
BusBOy Leaky Injector Join Date: Apr 2007 Location: killa cali Posts: 76 Trader Rating: (0) Feedback Score: 0 reviews	my car was heisitating too when my speedamotor wasnt working.. ever since i replace it, it ran like a stallion..

11-04-2007, 09:09 PM	#18
supreme_1 Zilvia Addict Join Date: Sep 2007 Location: hawaii Posts: 612 Trader Rating: (12) Feedback Score: 12 reviews	so were you able to find out what the problem was? my car just started doing this. i have all those signs except my car has a slight knock, and the exhaust smells like rotten eggs.