ca18det idle help - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

sean.arnold9012 · 11-20-2014, 12:36 PM

I recently did a ca18 swap into my 240sx

and im slowly trying to work out all of its demons.

im currently working on idle.

ok so I always have to start the car with a jump from my rx8.
it will stay on and run but only if I keep it reved up and constantly feather the gas.

And if the car is on and I take the jumper cables off the ca18 will turn off.

if I can get any help or suggestions that would be great. thank you

Juantwo3 · 11-20-2014, 01:28 PM

whats your battery voltage at?

l adam l · 11-20-2014, 01:29 PM

Check grounds, battery cables, connections/grounds on alternator...also make sure the battery is good

g35gabby · 11-20-2014, 01:32 PM

Well it sounds like your alternator is fubar, or isn't hooked up properly. once the car turns over the battery doesn't do much of anything as the alternator does all the work.

should see 12V with the battery off load

On load, there should be 14+V. My guess would be you aren't getting anywhere close to that.

Need to rectify one or both.

There may also be a significant power drain in the system that is draining your battery, but that is just a guess if the battery is really in decent shape.

sean.arnold9012 · 11-20-2014, 03:39 PM

battery was bad so I changed it. fixed the dying problem. car still doesn't want to idle though. I adjusted the electronic distributer and it got a little better. so im thinking the timing belt might be off a tooth

robinsone · 11-20-2014, 05:55 PM

check your idle air control valve (IACV) or mass air flow (MAF) sensor, those are usual culprits with older engines and higher mileage. I know on the KA24E and KA24DE engines there's also a engine temp sensor that can tweak the idle if its bad. I would check those, I've replaced all those parts when I had idle problems.

11-20-2014, 12:36 PM	#1
sean.arnold9012 Join Date: Jul 2014 Location: banning Posts: 27 Trader Rating: (0) Feedback Score: 0 reviews	ca18det idle help I recently did a ca18 swap into my 240sx and im slowly trying to work out all of its demons. im currently working on idle. ok so I always have to start the car with a jump from my rx8. it will stay on and run but only if I keep it reved up and constantly feather the gas. And if the car is on and I take the jumper cables off the ca18 will turn off. if I can get any help or suggestions that would be great. thank you

11-20-2014, 01:28 PM	#2
Juantwo3 Zilvia FREAK! Join Date: Sep 2011 Location: DTFullerton Age: 34 Posts: 1,103 Trader Rating: (20) Feedback Score: 20 reviews	whats your battery voltage at? __________________ GO DUCKS!!!!!!!!!

11-20-2014, 01:32 PM	#4
g35gabby Nissanaholic! Join Date: May 2010 Location: lake mary, Fl Age: 37 Posts: 1,954 Trader Rating: (26) Feedback Score: 26 reviews	Well it sounds like your alternator is fubar, or isn't hooked up properly. once the car turns over the battery doesn't do much of anything as the alternator does all the work. should see 12V with the battery off load On load, there should be 14+V. My guess would be you aren't getting anywhere close to that. Need to rectify one or both. There may also be a significant power drain in the system that is draining your battery, but that is just a guess if the battery is really in decent shape. __________________

11-20-2014, 03:39 PM	#5
sean.arnold9012 Join Date: Jul 2014 Location: banning Posts: 27 Trader Rating: (0) Feedback Score: 0 reviews	battery was bad so I changed it. fixed the dying problem. car still doesn't want to idle though. I adjusted the electronic distributer and it got a little better. so im thinking the timing belt might be off a tooth

11-20-2014, 05:55 PM	#6
robinsone Leaky Injector Join Date: Oct 2009 Location: Chicago, IL Age: 46 Posts: 129 Trader Rating: (8) Feedback Score: 8 reviews	check your idle air control valve (IACV) or mass air flow (MAF) sensor, those are usual culprits with older engines and higher mileage. I know on the KA24E and KA24DE engines there's also a engine temp sensor that can tweak the idle if its bad. I would check those, I've replaced all those parts when I had idle problems.