Hesitating while accelerating? KA24E - Infamous Nissan

dylanaguon · 11-06-2020, 01:22 AM

I've googled and read many other forums on why this could be and they've all said the same things fuel pump, fuel injectors, MAF, and throttle position sensor. I've ran tests on all of em but I still sense a bit of "pulling back" when I accelerate. I reset the throttle position sensor and that actually made it a lot better. Diagnose the fuel injectors, theyre firing well. MAF was unlugged, cleaned and is working well.
Any input on what it could be would be plenty help. Thank you.

rbourgeo · 11-06-2020, 06:16 PM

Spark plugs, wires, distributor cap, and rotor, ignition coil.

My experience is the hesitation is worse when it’s wet out when it’s one of the above.

LugNut1990 · 11-06-2020, 07:25 PM

Add air and fuel filters, and O2 sensor to the list. Also look for exhaust restrictions.

Read the codes?

dylanaguon · 11-06-2020, 09:12 PM

Quote:

Originally Posted by LugNut1990

Add air and fuel filters, and O2 sensor to the list. Also look for exhaust restrictions.

Read the codes?

just installed some headers so the o2 sensor is snug and brand new as well as a new fuel filter. but I'll def try the air filters. It is looking a bit grimy. Thank you for your input man

dylanaguon · 11-06-2020, 09:14 PM

Quote:

Originally Posted by rbourgeo

Spark plugs, wires, distributor cap, and rotor, ignition coil.

My experience is the hesitation is worse when it’s wet out when it’s one of the above.

checked and cleaned all spark plugs. Plus they are new and NGK iridiums as well as new NGK wires.

I will add the ignition coil and the distributor cap to the list. thank you i appreciate it.

rbourgeo · 11-06-2020, 10:17 PM

If it started after putting the new parts in, could be faulty parts. It happens. Fairly easy to check the wires with a multi meter.

LugNut1990 · 11-06-2020, 10:18 PM

And one more thing to try: big sucking sound when you loosen the gas cap, then runs fine for a bit?

jp2code · 11-07-2020, 02:22 AM

Pull the codes.

There is a link in my signature below with how to.

11-06-2020, 01:22 AM	#1
dylanaguon Join Date: May 2020 Location: Washington Posts: 23 Vehicle: 1991 Nissan Hardbody Thanks: 16 Thanked 1 Time in 1 Post	Hesitating while accelerating? KA24E I've googled and read many other forums on why this could be and they've all said the same things fuel pump, fuel injectors, MAF, and throttle position sensor. I've ran tests on all of em but I still sense a bit of "pulling back" when I accelerate. I reset the throttle position sensor and that actually made it a lot better. Diagnose the fuel injectors, theyre firing well. MAF was unlugged, cleaned and is working well. Any input on what it could be would be plenty help. Thank you.

11-06-2020, 07:25 PM	#3
LugNut1990 Join Date: Jul 2015 Location: N.E. Kansas Posts: 729 Vehicle: 1990 Nissan Hardbody Thanks: 0 Thanked 99 Times in 87 Posts	Add air and fuel filters, and O2 sensor to the list. Also look for exhaust restrictions. Read the codes? __________________ Original owner 1990 Nissan Hardbody, Aztec Red Standard cab, 4x4, KA24E, 5-speed Intentionally near-stock Mods: Second OEM horn, stereo/speakers/sub, mud and snow tires, HD trailer hitch (cat 3+), liquid bed liner, G1W dashcam Definitely not for sale!

11-06-2020, 10:18 PM	#7
LugNut1990 Join Date: Jul 2015 Location: N.E. Kansas Posts: 729 Vehicle: 1990 Nissan Hardbody Thanks: 0 Thanked 99 Times in 87 Posts	And one more thing to try: big sucking sound when you loosen the gas cap, then runs fine for a bit? __________________ Original owner 1990 Nissan Hardbody, Aztec Red Standard cab, 4x4, KA24E, 5-speed Intentionally near-stock Mods: Second OEM horn, stereo/speakers/sub, mud and snow tires, HD trailer hitch (cat 3+), liquid bed liner, G1W dashcam Definitely not for sale!

11-07-2020, 02:22 AM	#8
jp2code Software Developer Join Date: Dec 2011 Location: Longview, TX [USA] Age: 51 Posts: 10,427 Vehicle: 94 LB 2x4 Manual VG33e Thanks: 1,666 Thanked 1,498 Times in 1,316 Posts	Pull the codes. There is a link in my signature below with how to. __________________ Joe (not a mechanic!) • Don't have an account? EMAIL ME Factory Service Manuals: https://www.nicoclub.com/FSM/Hardbody/ Walk-through: Checking Nissan Trouble Codes 1994 VG30E to VG33E with H256 Cams

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11-06-2020, 06:16 PM	#2
rbourgeo Join Date: Mar 2020 Location: British Columbia, Canada Posts: 93 Vehicle: 1996 D21 Thanks: 31 Thanked 18 Times in 13 Posts	Spark plugs, wires, distributor cap, and rotor, ignition coil. My experience is the hesitation is worse when it’s wet out when it’s one of the above.

11-06-2020, 10:17 PM	#6
rbourgeo Join Date: Mar 2020 Location: British Columbia, Canada Posts: 93 Vehicle: 1996 D21 Thanks: 31 Thanked 18 Times in 13 Posts	If it started after putting the new parts in, could be faulty parts. It happens. Fairly easy to check the wires with a multi meter.