ka24de hesitation and misfire?? plz help! - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

ShimiBoi · 08-16-2011, 02:41 AM

like the title says i have a small problem, plz dont flame me...i did search and found some things that might help and tried them with no avail

so any help will be appreciated

things that might help you help me:
nearly stock ka24de with
-intake
-secondary butterfly delete
-cat-back exhaust
-msd blaster ss
-new ngk iridiums
-new ngk wires
-new cap and rotor
-new ignition coil wire
-throttle body spacer
-working egr
-connected aiv
-fuel filter replaced about 5k ago
-s13 auto ecu on stock manual s13.
-stock injectors [email protected] ohms [email protected] ohms [email protected] ohms [email protected]

problems:
-at start car is very hesitant and doesnt want to go, but doesnt misfire...just kinda bogs down until about 2500rpm (cold start).
-after it starts going car seems to run well under load.
-while decelerating with very partial throttle (ie. to slow the car down but not too fast) in gear car misfires
-at ~2000 rpm (while decelerating in gear) misfires several times and car gets a lil jerky.
-in neutral and revving up car will occasionally misfire after 2k
-under full throttle no misfire is noticed
-gas mileage has dropped from ~26 to ~24mpg (due to the auto ecu i presume)
-starts up fine even when cold

thank you zilvians for your help ahead of time!

Frankiegamer · 08-17-2011, 12:08 AM

You virgin! Did you get the LSD? Lol

Butcher240sx · 08-17-2011, 12:58 AM

Replace the 02 sensor.

ShimiBoi · 08-17-2011, 01:34 AM

Quote:

Originally Posted by Butcher240sx

Replace the 02 sensor.

i just replaced the o2 a couple months ago (May i think)...could it be dead already? Thanks

ShimiBoi · 08-17-2011, 01:35 AM

Quote:

Originally Posted by Frankiegamer

You virgin! Did you get the LSD? Lol

nah fuker....it was an open diff...u guys made me waste $4 and 2 hrs of my life

hahaha

Butcher240sx · 08-17-2011, 03:04 AM

Try swapping mafs then ecu for ones known to be good. See if that helps. Test the chts also.

ShimiBoi · 08-17-2011, 03:39 AM

Quote:

Originally Posted by Butcher240sx

Try swapping mafs then ecu for ones known to be good. See if that helps. Test the chts also.

Sorry, but what is the chts? Will an s14 maf work on an s13? Thanks

Butcher240sx · 08-17-2011, 04:55 AM

You need a s13 mafs. Chts is cylinder head temp switch. Its the two wire sensor. The one wire is for the gauge.

08-16-2011, 02:41 AM	#1
ShimiBoi Zilvia Member Join Date: Feb 2009 Location: Hawthorne Posts: 216 Trader Rating: (9) Feedback Score: 9 reviews	ka24de hesitation and misfire?? plz help! like the title says i have a small problem, plz dont flame me...i did search and found some things that might help and tried them with no avail so any help will be appreciated things that might help you help me: nearly stock ka24de with -intake -secondary butterfly delete -cat-back exhaust -msd blaster ss -new ngk iridiums -new ngk wires -new cap and rotor -new ignition coil wire -throttle body spacer -working egr -connected aiv -fuel filter replaced about 5k ago -s13 auto ecu on stock manual s13. -stock injectors [email protected] ohms [email protected] ohms [email protected] ohms [email protected] problems: -at start car is very hesitant and doesnt want to go, but doesnt misfire...just kinda bogs down until about 2500rpm (cold start). -after it starts going car seems to run well under load. -while decelerating with very partial throttle (ie. to slow the car down but not too fast) in gear car misfires -at ~2000 rpm (while decelerating in gear) misfires several times and car gets a lil jerky. -in neutral and revving up car will occasionally misfire after 2k -under full throttle no misfire is noticed -gas mileage has dropped from ~26 to ~24mpg (due to the auto ecu i presume) -starts up fine even when cold thank you zilvians for your help ahead of time!

08-17-2011, 12:58 AM	#3
Butcher240sx Zilvia Member Join Date: Oct 2010 Location: Houston Texas Age: 40 Posts: 157 Trader Rating: (0) Feedback Score: 0 reviews	Replace the 02 sensor. __________________ Don't Mess With Texas

08-17-2011, 03:04 AM	#6
Butcher240sx Zilvia Member Join Date: Oct 2010 Location: Houston Texas Age: 40 Posts: 157 Trader Rating: (0) Feedback Score: 0 reviews	Try swapping mafs then ecu for ones known to be good. See if that helps. Test the chts also. __________________ Don't Mess With Texas

08-17-2011, 04:55 AM	#8
Butcher240sx Zilvia Member Join Date: Oct 2010 Location: Houston Texas Age: 40 Posts: 157 Trader Rating: (0) Feedback Score: 0 reviews	You need a s13 mafs. Chts is cylinder head temp switch. Its the two wire sensor. The one wire is for the gauge. __________________ Don't Mess With Texas

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08-17-2011, 12:08 AM	#2
Frankiegamer Zilvia Junkie Join Date: Dec 2010 Location: Los Angeles Age: 30 Posts: 324 Trader Rating: (8) Feedback Score: 8 reviews	You virgin! Did you get the LSD? Lol