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View Full Version : ka24de Bad hesitation when car is cold. Goes away after warmed up. Any ideas?

SlideWise
06-19-2011, 05:04 PM
ka24de has bad hesitation and cuts out when car is cold but it goes away after warmed up and usually seams to run better above 2k rpms. After the car has warmed up the problem seams to go away but it will pant (rpms bounce up and down) at stop lights. The car has a new iacv, plugs, fuel filter, and fuel pump. Im at a loss as to the possible cause of the problem. Any input is greatly appreciated!
ericm9104
06-19-2011, 05:41 PM
Check the maf, that's all I can think of

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roboticnissan
06-19-2011, 05:50 PM
Coolant temp.sensor
SlideWise
06-19-2011, 10:22 PM
Coolant temp.sensor

Because i am unsure of how the coolant temp sensor could be causing this would you care to explain..?
SlideWise
06-20-2011, 03:05 PM
Anyone else have any ideas??
**drewy
06-20-2011, 09:10 PM
Because i am unsure of how the coolant temp sensor could be causing this would you care to explain..?

Because the car thinks it's warmer when it's not its not getting the right signal to the ecu. There are two ECT one that goes to the cluster(1 wire) and one that goes to the ecu(2 wire and the one you need to change) I'm
In the same boat as you man and I'm waiting on a new MAF an ECT and a new O2 sensor I hope that fixes my problem.... Good luck!
SlideWise
06-20-2011, 09:13 PM
It has been happening on and off for a few weeks now and slowly getting worse. The maf was cleaned with maf cleaner today and made no difference. Where is the temp sensor for the ecu located?
**drewy
06-20-2011, 09:18 PM
It has been happening on and off for a few weeks now and slowly getting worse. The maf was cleaned with maf cleaner today and made no difference. Where is the temp sensor for the ecu located?

1991-1994 240sx: Coolant Temperature Sensor gauge Tutorial : Nissan Online Mechanic (http://forums.nicoclub.com/zerothread?id=254375)
SlideWise
06-21-2011, 11:39 PM
Ohm specs check out ok on the temp sensor...
Double check the plugs and they look ok and gap was fine.
Im lost as to what to check next??
what should proper fuel pressure be on a ka24de?

The original poster of this thread has almost the same issues im having.
http://zilvia.net/f/tech-talk/101532-ka24de-missing-idle.html