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

Reply
 
Thread Tools Display Modes
Old 01-06-2021, 03:51 AM   #51
89'HBV6
Ol'school Geek
 
89'HBV6's Avatar
 
Join Date: Mar 2020
Location: Washington State
Posts: 182
Vehicle: 89' D21 KingCab SE V6 5spd 2WD - 87' D21 KingCab SE V6 5spd 2WD
Thanks: 209
Thanked 52 Times in 43 Posts
Default

Quote:
Originally Posted by jp2code View Post
With the CEL on, it won't pass emissions. Your MAF (and probably O2 sensors) will never be accurate, so the ECU will always be in limp mode.

Your best bet will be to rip out the ECU if you are going to do all that.
Oooooooo, I'd not yank it.

Easy fix(?), snip the ground lead for CEL light...... or unplug the bulb? No CEL light, no problem?

OH, no emissions in WA!
89'HBV6 is offline   Reply With Quote
Old 01-06-2021, 11:28 AM   #52
jp2code
Software Developer
 
jp2code's Avatar
 
Join Date: Dec 2011
Location: Longview, TX [USA]
Age: 51
Posts: 10,222
Vehicle: 94 LB 2x4 Manual VG33e
Thanks: 1,627
Thanked 1,435 Times in 1,263 Posts
Default

Quote:
Originally Posted by 89'HBV6 View Post
Oooooooo, I'd not yank it.

Easy fix(?), snip the ground lead for CEL light...... or unplug the bulb? No CEL light, no problem?

OH, no emissions in WA!
It would still be running in limp mode.
__________________
Joe (not a mechanic!) Don't have an account? EMAIL ME
Factory Service Manuals: https://www.nicoclub.com/FSM/Hardbody/
Walk-through: Checking Nissan Trouble Codes
1994 VG30E to VG33E with H256 Cams

jp2code is offline   Reply With Quote
Old 01-06-2021, 10:38 PM   #53
89'HBV6
Ol'school Geek
 
89'HBV6's Avatar
 
Join Date: Mar 2020
Location: Washington State
Posts: 182
Vehicle: 89' D21 KingCab SE V6 5spd 2WD - 87' D21 KingCab SE V6 5spd 2WD
Thanks: 209
Thanked 52 Times in 43 Posts
Default

Quote:
Originally Posted by jp2code View Post
It would still be running in limp mode.
Once carb'd, what would that matter? Would it affect how the truck runs?

I'm looking at keeping the ECU for the "other things" it controls. Is there a problem with this "path" in the thought process?
89'HBV6 is offline   Reply With Quote
Old 01-06-2021, 11:16 PM   #54
jp2code
Software Developer
 
jp2code's Avatar
 
Join Date: Dec 2011
Location: Longview, TX [USA]
Age: 51
Posts: 10,222
Vehicle: 94 LB 2x4 Manual VG33e
Thanks: 1,627
Thanked 1,435 Times in 1,263 Posts
Default

Quote:
Originally Posted by 89'HBV6 View Post
Once carb'd, what would that matter? Would it affect how the truck runs?

I'm looking at keeping the ECU for the "other things" it controls. Is there a problem with this "path" in the thought process?
I'm not sure, to be honest.

You show a 89 model truck, which doesn't have nearly as many features being controlled as the 96 model truck from travisg96.

The older trucks are converted to carbs more often. I haven't seen many people on here converting newer stuff to a carb, though.

My 94 has an aluminum intake plenum. I don't even have a way to mount a carb on it.
__________________
Joe (not a mechanic!) Don't have an account? EMAIL ME
Factory Service Manuals: https://www.nicoclub.com/FSM/Hardbody/
Walk-through: Checking Nissan Trouble Codes
1994 VG30E to VG33E with H256 Cams

jp2code is offline   Reply With Quote
Old 01-06-2021, 11:34 PM   #55
89'HBV6
Ol'school Geek
 
89'HBV6's Avatar
 
Join Date: Mar 2020
Location: Washington State
Posts: 182
Vehicle: 89' D21 KingCab SE V6 5spd 2WD - 87' D21 KingCab SE V6 5spd 2WD
Thanks: 209
Thanked 52 Times in 43 Posts
Default

OK. I don't know either..... thus the question.

I'm good with the FI, for now, but know that things can change quickly with a 30+YO vehicle.
89'HBV6 is offline   Reply With Quote
Old 01-09-2021, 01:02 AM   #56
travisg96
 
Join Date: Sep 2020
Location: OR
Posts: 55
Vehicle: 1986 D21 Long Bed HD
Thanks: 1
Thanked 3 Times in 3 Posts
Default

Quote:
Originally Posted by jp2code View Post
With the CEL on, it won't pass emissions. Your MAF (and probably O2 sensors) will never be accurate, so the ECU will always be in limp mode.

Your best bet will be to rip out the ECU if you are going to do all that.

Then you are going to need to find a way to monitor the fuel tank, speedometer, tachometer, and some probably other things.

These trucks are tied to the ECU pretty hard. The 1986.5 isn't so much. The 1987 to 1989 is more, but it can get by without it. Up to 1995 it gets difficult. In 1996, it went OBD2 and got a lot more dependent on the ECU for engine management.
Mine is an 1986.5 so I think I may be ok. No emissions here in Oregon where I live so I don't have to worry about that. I have no MAF I tore it out when I put the carb on.
travisg96 is offline   Reply With Quote
Old 01-10-2021, 04:46 AM   #57
cadillacdude1975
The Gear Jammer
 
cadillacdude1975's Avatar
 
Join Date: Apr 2013
Location: Chattanooga, TN
Age: 48
Posts: 10,160
Vehicle: 87 D21 SE KC V6 2wd 5sp & 87 Pathfinder 4x4 SE
Thanks: 419
Thanked 1,250 Times in 1,144 Posts
Default

Joe, you would need a VG30i intake for the carb conversion.
cadillacdude1975 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 05:34 AM.


Powered by vBulletin® Version 3.8.6
Copyright ©2000 - 2021, Jelsoft Enterprises Ltd.