Intake install, car won't idle now.... - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

Joe_M · 06-10-2002, 03:13 PM

I put in a CAI this weekend and now the car will not idle correctly.  When I start it up it will shoot up to about 1500 rpms and then just die.  I restart it, and hold the accelerator down and steady the idle to about 1000 and then it will "catch" and stay at around 600.  I don't know what the deal was so I took it all off, and put the stock airbox back in and it is doing the same thing.  All the vacuum lines are hooked back up and there are no leaks, I don't know why it won't idle correctly now.  

Also, when I start it up first thing in the morning it won't fast idle, it will either die, or idle at 600 right off the bat.

I've looked under the hood and visually inspected all the vacuum lines and when I was doing that, it appears that there is no harness connecting into the throttle position sensor on the throttle body.  If this wasn't hooked up, the car should be throwing a code 43, but there isn't a check engine light?  What is going on here?  I am ready to just give up and get another hybrid honda..........  but I love the Nissan too much.  Any suggestions?

Joe

*sykikchimp* · 06-10-2002, 04:20 PM

did you plug the MAF back in?

Joe_M · 06-10-2002, 08:10 PM

Yes, the MAF is plugged back in and I also shot the MAF with a little bit of carb cleaner to clean it out a bit.  I dunno what the problem is.  I guess I am going to have to take it all apart again and try and find the vacuum leak.

My Honda HB hybrid did that for a while too, turns out the IACV had a tiny leak in it, so the car wouldn't idle for crap.  Thanks!

Joe

birdy01 · 06-11-2002, 10:37 AM

Hey try taking off your battery terminal to reset your ECU for 30 secs or so, cause the amount of air that you were pulling with the stock air box is less that the new air intake.  so when you reconnect the battery and start up the car, it will re-adjust and know how much air is coming through the intake to the engine.

hopefully this helps

birdy01 · 06-11-2002, 10:38 AM

Hey try taking off your battery terminal to reset your ECU for 30 secs or so, cause the amount of air that you were pulling with the stock air box is less that the new air intake.  so when you reconnect the battery and start up the car, it will re-adjust and know how much air is coming through the intake to the engine.

hopefully this helps

*sykikchimp* · 06-11-2002, 01:29 PM

</span><table border="0" align="center" width="95%" cellpadding="3" cellspacing="1"><tr><td>Quote (Joe_M @ June 10 2002,10:10)</td></tr><tr><td id="QUOTE">My Honda HB hybrid did that for a while too, turns out the IACV had a tiny leak in it, so the car wouldn't idle for crap. Thanks!

Joe</td></tr></table><span id='postcolor'>
thats interesting....   Did you make sure the hose that connects the IAAV (IACV on honda) is connected?  If you have the DE motor it would have been connected to a plastic "T" that goes in-line from the Valve cover to the intake..

diabolic hippo · 06-12-2002, 04:06 PM

I had that exact same problem after i installed my injen intake, the car ran absolutly perfect until i installed my intake, drove my crazy, i could not diagnose the problem, reinstalled the intake 10 times cleaned everything, change plugs, fuel filter, cap, rotor, reset computer, cleaned out the throttle body, turned out to be the egr valve, replaced it now it runs fine, though now i have a cracked cylinder head. when will it end.

Joe_M · 06-12-2002, 06:55 PM

</span><table border="0" align="center" width="95%" cellpadding="3" cellspacing="1"><tr><td>Quote (sykikchimp @ June 11 2002,2:29)</td></tr><tr><td id="QUOTE"></span><table border="0" align="center" width="95%" cellpadding="3" cellspacing="1"><tr><td>Quote (Joe_M @ June 10 2002,10:10)</td></tr><tr><td id="QUOTE">My Honda HB hybrid did that for a while too, turns out the IACV had a tiny leak in it, so the car wouldn't idle for crap. Thanks!

Joe</td></tr></table><span id='postcolor'>
thats interesting.... Did you make sure the hose that connects the IAAV (IACV on honda) is connected? If you have the DE motor it would have been connected to a plastic "T" that goes in-line from the Valve cover to the intake..</td></tr></table><span id='postcolor'>
I have a DE and also the FSM, but I can't seem to find a pic of what you are referring to.  Do you have a picture?  Also if you could get me a pic of your throttle body so I can see if I am the only one in the world without the TPS connected and no CEL.  Thanks!

Joe

BEISSEN · 06-12-2002, 08:30 PM

here is the injen intake with the cae but i hape this helps.

Joe_M · 06-14-2002, 12:19 PM

I don't have that "T" from the valve cover to the intake arm, mine just goes straight from the valve cover into the intake tract......  damn, the owner before me has ghetto'ed the hell outta this car.... grrrr

Joe

BEISSEN · 06-14-2002, 08:28 PM

If you don't have the "T" section then you are not going to idel right cus you are missing one of your vacume lines.There are three lines from the intake one to the valve cover the other goes right above the throttle body and the last goes below the throttle body.

06-10-2002, 03:13 PM	#1
Joe_M Zilvia Member Join Date: Apr 2002 Location: Cincinnati, OH Age: 46 Posts: 210 Trader Rating: (0) Feedback Score: 0 reviews	I put in a CAI this weekend and now the car will not idle correctly.  When I start it up it will shoot up to about 1500 rpms and then just die.  I restart it, and hold the accelerator down and steady the idle to about 1000 and then it will "catch" and stay at around 600.  I don't know what the deal was so I took it all off, and put the stock airbox back in and it is doing the same thing.  All the vacuum lines are hooked back up and there are no leaks, I don't know why it won't idle correctly now.   Also, when I start it up first thing in the morning it won't fast idle, it will either die, or idle at 600 right off the bat. I've looked under the hood and visually inspected all the vacuum lines and when I was doing that, it appears that there is no harness connecting into the throttle position sensor on the throttle body.  If this wasn't hooked up, the car should be throwing a code 43, but there isn't a check engine light?  What is going on here?  I am ready to just give up and get another hybrid honda..........  but I love the Nissan too much.  Any suggestions? Joe __________________ 1991 240SX LE Fastback SOLD!! 1992 USDM OneVia CA18DET powered SOLD!! 1996 240SX Base Model Rockin' the 4 Lug 1995 240SX Base Model $400 project car... and it runs!

06-10-2002, 04:20 PM	#2
sykikchimp WOW addicted Join Date: Dec 2001 Location: the moon Age: 44 Posts: 6,525 Trader Rating: (0) Feedback Score: 0 reviews	did you plug the MAF back in? __________________

06-10-2002, 08:10 PM	#3
Joe_M Zilvia Member Join Date: Apr 2002 Location: Cincinnati, OH Age: 46 Posts: 210 Trader Rating: (0) Feedback Score: 0 reviews	Yes, the MAF is plugged back in and I also shot the MAF with a little bit of carb cleaner to clean it out a bit.  I dunno what the problem is.  I guess I am going to have to take it all apart again and try and find the vacuum leak. My Honda HB hybrid did that for a while too, turns out the IACV had a tiny leak in it, so the car wouldn't idle for crap.  Thanks! Joe __________________ 1991 240SX LE Fastback SOLD!! 1992 USDM OneVia CA18DET powered SOLD!! 1996 240SX Base Model Rockin' the 4 Lug 1995 240SX Base Model $400 project car... and it runs!

06-11-2002, 01:29 PM	#6
sykikchimp WOW addicted Join Date: Dec 2001 Location: the moon Age: 44 Posts: 6,525 Trader Rating: (0) Feedback Score: 0 reviews	</span><table border="0" align="center" width="95%" cellpadding="3" cellspacing="1"><tr><td>Quote (Joe_M @ June 10 2002,10:10)</td></tr><tr><td id="QUOTE">My Honda HB hybrid did that for a while too, turns out the IACV had a tiny leak in it, so the car wouldn't idle for crap. Thanks! Joe</td></tr></table><span id='postcolor'> thats interesting....   Did you make sure the hose that connects the IAAV (IACV on honda) is connected?  If you have the DE motor it would have been connected to a plastic "T" that goes in-line from the Valve cover to the intake.. __________________

06-12-2002, 06:55 PM	#8
Joe_M Zilvia Member Join Date: Apr 2002 Location: Cincinnati, OH Age: 46 Posts: 210 Trader Rating: (0) Feedback Score: 0 reviews	</span><table border="0" align="center" width="95%" cellpadding="3" cellspacing="1"><tr><td>Quote (sykikchimp @ June 11 2002,2:29)</td></tr><tr><td id="QUOTE"></span><table border="0" align="center" width="95%" cellpadding="3" cellspacing="1"><tr><td>Quote (Joe_M @ June 10 2002,10:10)</td></tr><tr><td id="QUOTE">My Honda HB hybrid did that for a while too, turns out the IACV had a tiny leak in it, so the car wouldn't idle for crap. Thanks! Joe</td></tr></table><span id='postcolor'> thats interesting.... Did you make sure the hose that connects the IAAV (IACV on honda) is connected? If you have the DE motor it would have been connected to a plastic "T" that goes in-line from the Valve cover to the intake..</td></tr></table><span id='postcolor'> I have a DE and also the FSM, but I can't seem to find a pic of what you are referring to.  Do you have a picture?  Also if you could get me a pic of your throttle body so I can see if I am the only one in the world without the TPS connected and no CEL.  Thanks! Joe __________________ 1991 240SX LE Fastback SOLD!! 1992 USDM OneVia CA18DET powered SOLD!! 1996 240SX Base Model Rockin' the 4 Lug 1995 240SX Base Model $400 project car... and it runs!

06-11-2002, 10:37 AM	#4
birdy01 Join Date: Mar 2002 Posts: 23 Trader Rating: (0) Feedback Score: 0 reviews	Hey try taking off your battery terminal to reset your ECU for 30 secs or so, cause the amount of air that you were pulling with the stock air box is less that the new air intake.  so when you reconnect the battery and start up the car, it will re-adjust and know how much air is coming through the intake to the engine. hopefully this helps

06-11-2002, 10:38 AM	#5
birdy01 Join Date: Mar 2002 Posts: 23 Trader Rating: (0) Feedback Score: 0 reviews	Hey try taking off your battery terminal to reset your ECU for 30 secs or so, cause the amount of air that you were pulling with the stock air box is less that the new air intake.  so when you reconnect the battery and start up the car, it will re-adjust and know how much air is coming through the intake to the engine. hopefully this helps

06-12-2002, 04:06 PM	#7
diabolic hippo Leaky Injector Join Date: Mar 2002 Posts: 76 Trader Rating: (0) Feedback Score: 0 reviews	I had that exact same problem after i installed my injen intake, the car ran absolutly perfect until i installed my intake, drove my crazy, i could not diagnose the problem, reinstalled the intake 10 times cleaned everything, change plugs, fuel filter, cap, rotor, reset computer, cleaned out the throttle body, turned out to be the egr valve, replaced it now it runs fine, though now i have a cracked cylinder head. when will it end.

06-12-2002, 08:30 PM	#9
BEISSEN Zilvia FREAK! Join Date: Nov 2001 Location: Woodbridge,VA Age: 42 Posts: 1,028 Trader Rating: (0) Feedback Score: 0 reviews	here is the injen intake with the cae but i hape this helps.

06-14-2002, 12:19 PM	#10
Joe_M Zilvia Member Join Date: Apr 2002 Location: Cincinnati, OH Age: 46 Posts: 210 Trader Rating: (0) Feedback Score: 0 reviews	I don't have that "T" from the valve cover to the intake arm, mine just goes straight from the valve cover into the intake tract......  damn, the owner before me has ghetto'ed the hell outta this car.... grrrr Joe __________________ 1991 240SX LE Fastback SOLD!! 1992 USDM OneVia CA18DET powered SOLD!! 1996 240SX Base Model Rockin' the 4 Lug 1995 240SX Base Model $400 project car... and it runs!

06-14-2002, 08:28 PM	#11
BEISSEN Zilvia FREAK! Join Date: Nov 2001 Location: Woodbridge,VA Age: 42 Posts: 1,028 Trader Rating: (0) Feedback Score: 0 reviews	If you don't have the "T" section then you are not going to idel right cus you are missing one of your vacume lines.There are three lines from the intake one to the valve cover the other goes right above the throttle body and the last goes below the throttle body.