SR idles but dies when on the road - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

T0fuman · 04-27-2013, 11:48 AM

So ive been having all kinds of problems with the swap i bought. Its 4 years old and the previous owner did nothing but beat on it I guess. It ran fine when the swap was done by a shop and the shop sold it to the guy I bought it from. When i picked it up it took forever to start and had a boost leak. Ive since fixed alot of problems but now have a idle issue. My fuel pressure was not right so I put in a aftermarket FPR with a guage so I could moitor it better. Now when the car comes to a stop at a light or something it just dies. Or when you rev the enine past 2k it just dies. Holds fuel pressure fine and my pump continues to prime so I dont think its fuel. Also just put in new spark plugs and cleaned the IVAC. Was idling around 2k before I did the FPR and plugs so I thought i did some good cause not its a pretty constant 900-1100 idle. When you hammer on the gas the thing takes off like a rocket and spools fine, it will continue to drive as long as you dont let it go back to idling range.

ultimateirving · 04-27-2013, 12:20 PM

Your iacv is not functioning. Replace or try and see if its not connected properly/wires sharted out

zombiewolf513 · 04-27-2013, 01:04 PM

Is your BOV venting to atmosphere?

T0fuman · 04-27-2013, 01:08 PM

BOV is functioning like it should.

zombiewolf513 · 04-27-2013, 01:18 PM

If you're venting to atmosphere and still using a MAF... that's most likely the cause of your problem.

T0fuman · 04-27-2013, 01:20 PM

Well i didnt have this problem before. So i thought it might be something i did? However lots of things are old on this swap.

zombiewolf513 · 04-27-2013, 01:33 PM

I see. Have a multimeter?

04-27-2013, 11:48 AM	#1
T0fuman Join Date: Apr 2013 Location: Florida Age: 36 Posts: 20 Trader Rating: (0) Feedback Score: 0 reviews	SR idles but dies when on the road So ive been having all kinds of problems with the swap i bought. Its 4 years old and the previous owner did nothing but beat on it I guess. It ran fine when the swap was done by a shop and the shop sold it to the guy I bought it from. When i picked it up it took forever to start and had a boost leak. Ive since fixed alot of problems but now have a idle issue. My fuel pressure was not right so I put in a aftermarket FPR with a guage so I could moitor it better. Now when the car comes to a stop at a light or something it just dies. Or when you rev the enine past 2k it just dies. Holds fuel pressure fine and my pump continues to prime so I dont think its fuel. Also just put in new spark plugs and cleaned the IVAC. Was idling around 2k before I did the FPR and plugs so I thought i did some good cause not its a pretty constant 900-1100 idle. When you hammer on the gas the thing takes off like a rocket and spools fine, it will continue to drive as long as you dont let it go back to idling range.

04-27-2013, 12:20 PM	#2
ultimateirving Zilvia FREAK! Join Date: Nov 2010 Location: arizona Age: 37 Posts: 1,521 Trader Rating: (1) Feedback Score: 1 reviews	Your iacv is not functioning. Replace or try and see if its not connected properly/wires sharted out __________________ Z32 with lq4 swap Desert Street Scene \|\| Dssevents.com

04-27-2013, 01:04 PM	#3
zombiewolf513 BANNED Join Date: Mar 2011 Location: AZ Age: 37 Posts: 1,682 Trader Rating: (6) Rides Gallery: zombiewolf513 Feedback Score: 6 reviews	Is your BOV venting to atmosphere?

04-27-2013, 01:08 PM	#4
T0fuman Join Date: Apr 2013 Location: Florida Age: 36 Posts: 20 Trader Rating: (0) Feedback Score: 0 reviews	BOV is functioning like it should.

04-27-2013, 01:18 PM	#5
zombiewolf513 BANNED Join Date: Mar 2011 Location: AZ Age: 37 Posts: 1,682 Trader Rating: (6) Rides Gallery: zombiewolf513 Feedback Score: 6 reviews	If you're venting to atmosphere and still using a MAF... that's most likely the cause of your problem.

04-27-2013, 01:20 PM	#6
T0fuman Join Date: Apr 2013 Location: Florida Age: 36 Posts: 20 Trader Rating: (0) Feedback Score: 0 reviews	Well i didnt have this problem before. So i thought it might be something i did? However lots of things are old on this swap.

04-27-2013, 01:33 PM	#7
zombiewolf513 BANNED Join Date: Mar 2011 Location: AZ Age: 37 Posts: 1,682 Trader Rating: (6) Rides Gallery: zombiewolf513 Feedback Score: 6 reviews	I see. Have a multimeter?