Car wants to die (A/C) - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

tunedis95 · 06-11-2006, 11:58 AM

finally insalled ac....using JDM s13 air compressor and accessories. well i pluged in the signal from the chasis to the compressor and no luck...so i wired it st8 to a switch and now the ac works but when i pop the car into neutral it dies or idles around 500 rpm till i stop and then it pops pack up to 750 rpm....i tried wiring that chasis wire to the switch along with the compressor and no luck it made it worse....what can i do

tunedis95 · 06-12-2006, 12:38 PM

BTW this is on a 95 ka24de!!!

tre · 06-12-2006, 12:46 PM

the car should correct for the load put on the engine when the AC pump is working. I dont know what controls what when it comes to this though

tunedis95 · 06-12-2006, 12:48 PM

thats what i'm looking for..i tried connecting the "what i thought was the remote wire" coming from the fron drivers side of the engine bay buy no luck

tre · 06-12-2006, 12:48 PM

Check a wiring diagram. I'm sure if you do a search something will come upw ith a wiring diagram here

S13Eye · 06-12-2006, 01:12 PM

I'm assuming you are using an SR20 with the JDM compressor. You will need to trace the signal wire, to the relay. On S13 SR, its pin 106 Green/Black, and it could be the same for other generations. Just check the wiring diagrams. The A/C clutch must be signaled by the ECU because it puts a lot of load on the engine, and thats why its stalling out. The engine needs prepare itself for this load by increasing the RPMs.

Edit: Also, the ECU needs to shut off the A/C compressor during WOT acceleration - for obvious reasons.

projectRDM · 06-12-2006, 02:13 PM

From your post, you're saying you're using an S13 A/C compressor on a KA motor in a S14. If this incorrect, read what you've written and correct it. Your typing skills leave a shitload to be desired.

Whether it is correct or not, the IACV-FICD valve is not working if the engine isn't idling up when the compressor is engaged. Check/clean/replace it. I'm assuming that's your problem, however again I can't read ebonics or long run-on sentences so I'm not sure that's what you're asking.

S13Eye · 06-12-2006, 02:17 PM

Quote:

Originally Posted by R240NA

Whether it is correct or not, the IACV-FICD valve is not working if the engine isn't idling up when the compressor is engaged. Check/clean/replace it. I'm assuming that's your problem

He mentioned that he bypassed the ECU, and applied current dirrectly to the compressor clutch. This is why his RPMs were not increasing to support the load from the compressor. By the time the ECU figured out WTF was going on, the engine stalled out.

projectRDM · 06-12-2006, 02:21 PM

Quote:

Originally Posted by S13Eye

He mentioned that he bypassed the ECU, and applied current dirrectly to the compressor clutch. This is why his RPMs were not increasing to support the load from the compressor. By the time the ECU figured out WTF was going on, the engine stalled out.

You must be more gifted than I am. I read it three times and didn't pick up on any of that.

tunedis95 · 06-14-2006, 06:44 AM

Quote:

Originally Posted by R240NA

From your post, you're saying you're using an S13 A/C compressor on a KA motor in a S14. If this incorrect, read what you've written and correct it. Your typing skills leave a shitload to be desired.

Whether it is correct or not, the IACV-FICD valve is not working if the engine isn't idling up when the compressor is engaged. Check/clean/replace it. I'm assuming that's your problem, however again I can't read ebonics or long run-on sentences so I'm not sure that's what you're asking.

I have a 1990 nissan 240sx, with a 1995 ka24de motor and trans, and am using all the JDM S13 A/C components (condenser, lines, compressor...ect) THANX FOR BEING AN ASS!!!! AND THANK YOU EVERYONE ELSE FOR THE HELP!!!

06-11-2006, 11:58 AM	#1
tunedis95 Join Date: Dec 2005 Location: Cypress, TX Posts: 34 Trader Rating: (0) Feedback Score: 0 reviews	Car wants to die (A/C) finally insalled ac....using JDM s13 air compressor and accessories. well i pluged in the signal from the chasis to the compressor and no luck...so i wired it st8 to a switch and now the ac works but when i pop the car into neutral it dies or idles around 500 rpm till i stop and then it pops pack up to 750 rpm....i tried wiring that chasis wire to the switch along with the compressor and no luck it made it worse....what can i do

06-12-2006, 12:46 PM	#3
tre Zilvia Junkie Join Date: Apr 2006 Location: Seattle, WA Posts: 544 Trader Rating: (0) Feedback Score: 0 reviews	the car should correct for the load put on the engine when the AC pump is working. I dont know what controls what when it comes to this though __________________ I didn't buy an Audi because it is a Great Car, but for more of a reason to be an asshole.

06-12-2006, 12:48 PM	#5
tre Zilvia Junkie Join Date: Apr 2006 Location: Seattle, WA Posts: 544 Trader Rating: (0) Feedback Score: 0 reviews	Check a wiring diagram. I'm sure if you do a search something will come upw ith a wiring diagram here __________________ I didn't buy an Audi because it is a Great Car, but for more of a reason to be an asshole.

06-12-2006, 12:38 PM	#2
tunedis95 Join Date: Dec 2005 Location: Cypress, TX Posts: 34 Trader Rating: (0) Feedback Score: 0 reviews	BTW this is on a 95 ka24de!!!

06-12-2006, 01:12 PM	#6
S13Eye Zilvia Member Join Date: Feb 2006 Location: Los Angeles Age: 40 Posts: 190 Trader Rating: (0) Feedback Score: 0 reviews	I'm assuming you are using an SR20 with the JDM compressor. You will need to trace the signal wire, to the relay. On S13 SR, its pin 106 Green/Black, and it could be the same for other generations. Just check the wiring diagrams. The A/C clutch must be signaled by the ECU because it puts a lot of load on the engine, and thats why its stalling out. The engine needs prepare itself for this load by increasing the RPMs. Edit: Also, the ECU needs to shut off the A/C compressor during WOT acceleration - for obvious reasons.

06-12-2006, 02:13 PM	#7
projectRDM Post Whore! Join Date: Dec 2002 Location: Atlanta Age: 51 Posts: 13,812 Trader Rating: (12) Feedback Score: 12 reviews	From your post, you're saying you're using an S13 A/C compressor on a KA motor in a S14. If this incorrect, read what you've written and correct it. Your typing skills leave a shitload to be desired. Whether it is correct or not, the IACV-FICD valve is not working if the engine isn't idling up when the compressor is engaged. Check/clean/replace it. I'm assuming that's your problem, however again I can't read ebonics or long run-on sentences so I'm not sure that's what you're asking.