put intake on and the car won't start?? - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

XXX4life · 01-30-2004, 11:02 PM

ok i have a 90 240sx so ka24e motor, i put an intake on it and it wouldn't start?? i noticed there was a sensor on the old airbox so i took that off the air box and left it plugged in, it still won't start?? i don;t get it? i put the airbox back in and it starts? can someone please help me
thanks

Brolewigi · 01-31-2004, 06:26 AM

There is your problem. The car needs the MAF sensor to operate. Its almost like doing a lung transplant and taking out your diaphram so you can't breathe. Put your old intake back on.

thx247 · 01-31-2004, 06:50 AM

dunno what intake you have, but that sensor you took off tells the motor how much air was drawn in, if the intake does not have a place to use that sensor, time to go back to stock

XXX4life · 01-31-2004, 08:54 AM

i didn't remove the maf sensor, so that little sensor on the airbox need to be in the airbox??

matlock · 01-31-2004, 02:06 PM

Take some pictures if you can so that we can see what plugs you are talking about, because I would've said MAF also. It's kinda funny I put an intake on my car and the idle fixed, becuase it used to idle rough and now its all good!

G_Fish240 · 01-31-2004, 02:44 PM

you probably have your mafs on wrong

Var · 01-31-2004, 02:58 PM

I think I know what it is. It's the IAT sensor(Intake air temperature) i put a resistor in mine so it tells my ecu i'm constantly getting 57 degree air. Get this resistor from Radio Shack or wherever they sell resistors and install it on the sensor, then cover it up with e-tape.

4.7k ohm, 1/2 watt resistor. This is documented to work on a Camaro but in theory they are both 5 volt sensors so it should create the same reading on all 5 volt sensors. Good luck.

zero.counter · 01-31-2004, 04:05 PM

Quote:

Originally Posted by westboroughpimp

I think I know what it is. It's the IAT sensor(Intake air temperature) i put a resistor in mine so it tells my ecu i'm constantly getting 57 degree air. Get this resistor from Radio Shack or wherever they sell resistors and install it on the sensor, then cover it up with e-tape.

4.7k ohm, 1/2 watt resistor. This is documented to work on a Camaro but in theory they are both 5 volt sensors so it should create the same reading on all 5 volt sensors. Good luck.

That's exactly what he is talking about...Some of the CAIs come with a bung past the MAFS to plug the Intake Air Temperature (IAT) sensor in, eliminating the need for that procedure.

XXX4life · 01-31-2004, 04:59 PM

i just went and messed witrh it some more, i pulled the sensor out of the airbox and start the car, it started and ran fine, then i moved the airbox and everything and put the cone on and it won;t start??? the maf is still plugged in i haven't touched it, this is pissing me off it's doesn't make any sense

zero.counter · 01-31-2004, 05:19 PM

Quote:

Originally Posted by XXX4life

i just went and messed witrh it some more, i pulled the sensor out of the airbox and start the car, it started and ran fine, then i moved the airbox and everything and put the cone on and it won;t start??? the maf is still plugged in i haven't touched it, this is pissing me off it's doesn't make any sense

Remember what westboroughpimp said and use this as a guide for the resistance...

Sorry for the size, but the plan works....

01-30-2004, 11:02 PM	#1
XXX4life Zilvia Member Join Date: Jan 2004 Location: portland, OR Age: 43 Posts: 268 Trader Rating: (0) Feedback Score: 0 reviews	put intake on and the car won't start?? ok i have a 90 240sx so ka24e motor, i put an intake on it and it wouldn't start?? i noticed there was a sensor on the old airbox so i took that off the air box and left it plugged in, it still won't start?? i don;t get it? i put the airbox back in and it starts? can someone please help me thanks __________________ 04 Scion xb 90 240sx (ka24de) www.entrustclothing.com

01-31-2004, 06:26 AM	#2
Brolewigi Zilvia Member Join Date: Dec 2003 Location: Michigan Age: 40 Posts: 152 Trader Rating: (0) Feedback Score: 0 reviews	There is your problem. The car needs the MAF sensor to operate. Its almost like doing a lung transplant and taking out your diaphram so you can't breathe. Put your old intake back on. __________________

01-31-2004, 08:54 AM	#4
XXX4life Zilvia Member Join Date: Jan 2004 Location: portland, OR Age: 43 Posts: 268 Trader Rating: (0) Feedback Score: 0 reviews	i didn't remove the maf sensor, so that little sensor on the airbox need to be in the airbox?? __________________ 04 Scion xb 90 240sx (ka24de) www.entrustclothing.com

01-31-2004, 02:44 PM	#6
G_Fish240 Zilvia Addict Join Date: Aug 2003 Location: Sacramento Age: 39 Posts: 634 Trader Rating: (0) Feedback Score: 0 reviews	you probably have your mafs on wrong __________________ Sacramento touge and drift MakotoS13: Spreading BS and being an ass on zilvia since June 2004

01-31-2004, 02:58 PM	#7
Var Post Whore! Join Date: Sep 2003 Location: Norcal Age: 43 Posts: 5,032 Trader Rating: (0) Rides Gallery: Var Feedback Score: 0 reviews	I think I know what it is. It's the IAT sensor(Intake air temperature) i put a resistor in mine so it tells my ecu i'm constantly getting 57 degree air. Get this resistor from Radio Shack or wherever they sell resistors and install it on the sensor, then cover it up with e-tape. 4.7k ohm, 1/2 watt resistor. This is documented to work on a Camaro but in theory they are both 5 volt sensors so it should create the same reading on all 5 volt sensors. Good luck. __________________ Hi

01-31-2004, 06:50 AM	#3
thx247 Zilvia FREAK! Join Date: Jan 2003 Location: bay area Posts: 1,455 Trader Rating: (0) Feedback Score: 0 reviews	dunno what intake you have, but that sensor you took off tells the motor how much air was drawn in, if the intake does not have a place to use that sensor, time to go back to stock

01-31-2004, 02:06 PM	#5
matlock Zilvia FREAK! Join Date: Jul 2003 Location: California Age: 40 Posts: 1,169 Trader Rating: (0) Feedback Score: 0 reviews	Take some pictures if you can so that we can see what plugs you are talking about, because I would've said MAF also. It's kinda funny I put an intake on my car and the idle fixed, becuase it used to idle rough and now its all good!

01-31-2004, 04:59 PM	#9
XXX4life Zilvia Member Join Date: Jan 2004 Location: portland, OR Age: 43 Posts: 268 Trader Rating: (0) Feedback Score: 0 reviews	i just went and messed witrh it some more, i pulled the sensor out of the airbox and start the car, it started and ran fine, then i moved the airbox and everything and put the cone on and it won;t start??? the maf is still plugged in i haven't touched it, this is pissing me off it's doesn't make any sense __________________ 04 Scion xb 90 240sx (ka24de) www.entrustclothing.com