sr20 will not rev past 3k - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

kbui · 08-11-2011, 03:07 PM

hello,

To start, i have an sr20det with a z32 maf. at first i thought it was the maf; so i checked the wiring with meter....turns out the wiring is correct. I replaced the maf with a know working one....still won't rev past 3k. i cleaned both sensors and still nothing.

Its running real rich at idle and like i said won;t rev past the 3k in neutral. anyone have any ideas? i checked for a boost leak, but found nothing. however my boost gauge does say -12 inHG. If i remember correctly, my past sr20dets have read in the -20s. Maybe I have the vacuum hoses hooked up wrong?

as it sits it idles alright and does smoke, but i figured it is because of how rich it is. can it be tps? but a tps wouldn't cause it to run rich. I replaced the iacv, thinking it was that, but still nothing.

What do you guys think?

thanks
kbui

ultimateirving · 08-11-2011, 03:11 PM

1. hoping u have a tune for the z32 maf, as sr will dump fuel without it.
2. try checking voltage on tps close and wot.
3. replace CTS if all else fails
4. ...???...
5. Profit.

vas570sx · 08-11-2011, 03:24 PM

check maf signal at the ecu.

check ecu for codes.

!Zar! · 08-11-2011, 03:30 PM

Still sounds like a maf related problem.

Also check your intercooler piping. Sounds like you have a vacuum leak.

As mentioned before in regards to your maf, if you do not have a tune for it then that is the reason it isn't running properly.

You normally do not run a z32 maf unless you have an upgraded turbo, injectors, ecu. So if you do not have those three things, that is probably why it won't run as it should.

speedgod^s13 · 08-11-2011, 03:35 PM

Quote:

Originally Posted by !Zar!

Still sounds like a maf related problem.

Also check your intercooler piping. Sounds like you have a vacuum leak.

This man speaks the truth. Who says JB fans are good for nothing?

kbui · 08-11-2011, 06:54 PM

i do have a tune, i'll recheck the couplers

!Zar! · 08-12-2011, 02:12 AM

Quote:

Originally Posted by kbui

i do have a tune, i'll recheck the couplers

A tune for what exactly?

But honestly, it sounds like the couplers.

08-11-2011, 03:07 PM	#1
kbui Zilvia Junkie Join Date: Jul 2007 Location: albuquerque, new mexico Age: 37 Posts: 342 Trader Rating: (12) Feedback Score: 12 reviews	sr20 will not rev past 3k hello, To start, i have an sr20det with a z32 maf. at first i thought it was the maf; so i checked the wiring with meter....turns out the wiring is correct. I replaced the maf with a know working one....still won't rev past 3k. i cleaned both sensors and still nothing. Its running real rich at idle and like i said won;t rev past the 3k in neutral. anyone have any ideas? i checked for a boost leak, but found nothing. however my boost gauge does say -12 inHG. If i remember correctly, my past sr20dets have read in the -20s. Maybe I have the vacuum hoses hooked up wrong? as it sits it idles alright and does smoke, but i figured it is because of how rich it is. can it be tps? but a tps wouldn't cause it to run rich. I replaced the iacv, thinking it was that, but still nothing. What do you guys think? thanks kbui

08-11-2011, 03:24 PM	#3
vas570sx Zilvia Addict Join Date: Jun 2008 Location: west palm beach Posts: 844 Trader Rating: (0) Feedback Score: 0 reviews	check maf signal at the ecu. check ecu for codes. __________________

08-11-2011, 03:30 PM	#4
!Zar! Post Whore! Join Date: Nov 2004 Location: North Korea Posts: 14,579 Trader Rating: (27) Feedback Score: 27 reviews	Still sounds like a maf related problem. Also check your intercooler piping. Sounds like you have a vacuum leak. As mentioned before in regards to your maf, if you do not have a tune for it then that is the reason it isn't running properly. You normally do not run a z32 maf unless you have an upgraded turbo, injectors, ecu. So if you do not have those three things, that is probably why it won't run as it should. __________________

08-11-2011, 03:11 PM	#2
ultimateirving Zilvia FREAK! Join Date: Nov 2010 Location: arizona Age: 37 Posts: 1,521 Trader Rating: (1) Feedback Score: 1 reviews	1. hoping u have a tune for the z32 maf, as sr will dump fuel without it. 2. try checking voltage on tps close and wot. 3. replace CTS if all else fails 4. ...???... 5. Profit.

08-11-2011, 06:54 PM	#6
kbui Zilvia Junkie Join Date: Jul 2007 Location: albuquerque, new mexico Age: 37 Posts: 342 Trader Rating: (12) Feedback Score: 12 reviews	i do have a tune, i'll recheck the couplers