Go Back   Infamous Nissan - Hardbody / Frontier Forums > Model Specific > Hardbody Forum (D21)

Reply
 
Thread Tools Display Modes
Old 08-03-2012, 04:39 AM   #1
Danbo
 
Danbo's Avatar
 
Join Date: Jun 2012
Location: Fayetteville nc
Posts: 25
Vehicle: 1986 NISSAN D21 LONGBED 2.4L
Thanks: 3
Thanked 0 Times in 0 Posts
Default Fuel air ratio help?!

I have a 86 nissan d21 z24 2.4L rwd
It is running rich and was wondering if anyone knew what the correct fuel air ratio is supposed to be for my truck? And if the screw is turned all the way IN, How many turns out would it be to set it right?
__________________
HARDBODY LOVE!!!
Danbo is offline   Reply With Quote
Old 08-03-2012, 04:29 PM   #2
Static808
ALOHA SERVED DAILY!
 
Static808's Avatar
 
Join Date: Jan 2012
Location: North Las Vegas, NV
Posts: 285
Vehicle: 1990 Hardbody
Thanks: 14
Thanked 12 Times in 10 Posts
Default

I would say play with it lol n tune it to.how u like it
__________________
Static808 is offline   Reply With Quote
Old 08-03-2012, 06:59 PM   #3
Longtooth
 
Longtooth's Avatar
 
Join Date: Oct 2011
Location: Portland, Oregon
Posts: 863
Vehicle: Nissan Hardbody 1989
Thanks: 33
Thanked 85 Times in 77 Posts
Default

If your going for emissions you need a sniffer so you can adjust as needed. My weber on my zuki I back out till it runs like shit then turn back in till it runs good.
Longtooth is offline   Reply With Quote
Old 08-03-2012, 07:14 PM   #4
SkinnyG
UYFBR
 
SkinnyG's Avatar
 
Join Date: Sep 2008
Location: Okanagan Valley - Canada, eh?!
Posts: 1,505
Vehicle: 1994 Hardbody
Thanks: 0
Thanked 219 Times in 149 Posts
Default

When I had carbs, I'd adjust to the highest idle vacuum.

This might not pass emissions - to pass, I'd lean it until it just about stumbles (but not lean missfire - that would increase HC).
__________________
No longer an active member - The Hideous Hardbody has been sold
SkinnyG is offline   Reply With Quote
Old 04-22-2022, 07:18 PM   #5
smith
 
Join Date: Feb 2020
Location: Arizona
Posts: 62
Vehicle: 93 nissan d21 2WD KA24E Manual
Thanks: 12
Thanked 2 Times in 2 Posts
Thumbs up


Last edited by smith; 04-22-2022 at 09:29 PM. Reason: mistake
smith is offline   Reply With Quote
Old 04-24-2022, 08:03 AM   #6
XoXSciFiGuy
 
XoXSciFiGuy's Avatar
 
Join Date: May 2017
Location: Yakima, WA
Posts: 3,390
Vehicle: 2009 Xterra, 1997 D21 King Cab XE (sold)
Thanks: 251
Thanked 698 Times in 623 Posts
Default

The big general problem with those type of engines they made back then is that not even Nissan engineers figured anyone would still be driving them almost forty years later.

What often happens is all the stuff they added to those engines to make them pass US emissions...eventually starts complaining or wearing out...

And the aftermarket parts manufacturers still aren't offering brand new throttle body systems with all new parts included...

So eventually you either have to wing it as best you can...or keep it tuned with the best parts and adjust stuff occasionally. Just not TOO much playing around or they will run worse than before.

The other option is to do the Weber carb conversion, but then you may not pass emissions in your state (if it has emissions) and your mileage will drop anyway.

Trust me. Been down this road many times. MANY times. I had a few of these trucks back when they were new or newer. (I will attach a picture of one I owned from 95-98. When I had this truck, it went like a bat out of frickin' hell and did the zoom zoom for sure.

But it was only nine years old when I got it, and with low miles, and back when dinosaurs still roamed the earth. When these trucks started hitting America they were a beautiful thing. And they still are. But...if some aftermarket company started offering brand new TBI systems, COMPLETE ones, they would make a killing from classic Nissan truck owners. People would flood them with orders, rip out their 40 year old TBI systems, and install new ones. So far....nothing. It is a real hole in the parts market these days. You can damn near build yourself a 65 Mustang through the aftermarket. But classic Nissan has always been shorted by the aftermarket companies. Like Rodney Dangerfield, we just get no respect.

I'm not always right, (ask other members lol) but I have been working on and driving classic Nissans since about 1978. I've had the 70 Datsun truck, the 78 610 sedan (way ahead of its time), a couple of B-210's, (dangerous on curves, too light in the ass end) a big 810 with the six cylinder fuel injection, and even an 82 more recently that I restored and sold. (Picture below)

Been there. Definitely done that. They should bury me in a Datsun lol.



The ZX from 2018, taken before the restoration while it sat at the previous owner's house:

__________________

2009 Xterra, 4.0 liter, automatic, 4WD.

Last edited by XoXSciFiGuy; 04-24-2022 at 08:24 AM.
XoXSciFiGuy is offline   Reply With Quote
Old 04-24-2022, 12:43 PM   #7
cadillacdude1975
The Gear Jammer
 
cadillacdude1975's Avatar
 
Join Date: Apr 2013
Location: Chattanooga, TN
Age: 50
Posts: 10,752
Vehicle: 87 VG33 Pathfinder SE 4x4 & 87 D21 SE
Thanks: 462
Thanked 1,417 Times in 1,281 Posts
Default

My EGR deleted carbed VG33 pathfinder passed the tailpipe sniff test. They finally canned the emissions testing here. A local senator got the law changed. It was deemed a tax on the poor.
cadillacdude1975 is offline   Reply With Quote
Old 04-26-2022, 12:16 AM   #8
street_rulerr
 
Join Date: Nov 2015
Location: West Coast
Posts: 2,463
Vehicle: 1996 4x4 5spd
Thanks: 0
Thanked 236 Times in 219 Posts
Default

back it out 2.5 turns. 900 degrees. thats a standard place to start.
street_rulerr is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT. The time now is 08:32 PM.


Powered by vBulletin® Version 3.8.6
Copyright ©2000 - 2022, Jelsoft Enterprises Ltd.