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

Reply
 
Thread Tools Display Modes
Old 12-19-2020, 11:33 PM   #1
Totalld21
 
Totalld21's Avatar
 
Join Date: Mar 2017
Location: British Columbia
Posts: 118
Vehicle: 1996 d21 xe, 4x4, v6
Thanks: 1
Thanked 2 Times in 2 Posts
Default D21 v6, Over fueling, sputtering, undriveable.

So my trucks a 1995 v6 xe it runs extremely rich and doesn't idle good at all. It ran rich before my idle problems and sometimes would have a stumble for 10 seconds when first starting it, then would idle and run fine. But now when u give it gas the rpms drop and then jump up right after, just seems like its getting too much fuel. This make my truck pretty much undrivable. Seems to be when my dad pushes down onto the maf connector the rpms change a little bit, but doesn't fully clean up the idle. Can a connector go bad? I also unplugged my maf sensor and it still runs bad, I also checked continuity from ecm pins to the maf connectors wires, it also checked out. I should also mention all plugs are covered in soot "blackened" dry not wet. And seem to be getting spark through every wire.

Things I've replaced.
-spark plugs
-dcap and rotor
-sparkplugs
-maf sensor from wreckers
-Fuel pressure regulator.

Im at a loss for what else to check next, seems like lots of people have idling issues for the v6, but no one with a truck running so rough that its undriveable. Getting close to a month of troubleshooting and I'm over it.

Video of it running like crap - https://www.youtube.com/watch?v=h7ON...nnel=totalld21

Idling smoother but still running better. https://www.youtube.com/watch?v=bCTn...nnel=totalld21

last time i was even able to get it to drive in the last video, it ran like it was really down on power, but was still able to drive up a pretty steep hill.

Any suggestions or help is welcome, I've done a crap ton of posting on the facebook page but decided i should make a post here as well to better document my struggle.

I miss my d21 and it misses me dammit. xD

Last edited by Totalld21; 12-19-2020 at 11:42 PM.
Totalld21 is offline   Reply With Quote
Old 12-20-2020, 12:04 AM   #2
jp2code
Software Developer
 
jp2code's Avatar
 
Join Date: Dec 2011
Location: Longview, TX [USA]
Age: 51
Posts: 10,282
Vehicle: 94 LB 2x4 Manual VG33e
Thanks: 1,638
Thanked 1,458 Times in 1,281 Posts
Default

Pull the codes. If it comes back with Code 55, look for vacuum leaks.
__________________
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 12-20-2020, 12:22 AM   #3
Deerhurst
4/86 SE-V6 2 tone 4x4 HB
 
Deerhurst's Avatar
 
Join Date: Apr 2013
Location: Oregon
Posts: 7,223
Vehicle: 1986.5 SE-V6 4WD D21, 2003 Audi A4 Avant 3.0 Quattro
Thanks: 882
Thanked 861 Times in 787 Posts
Default

I've only ever had vaccum leaks cause me bad idle issues.



I'd pull codes, if 55 then check for vacuum leaks and confirm timing. When I had my timing set poorly it had no torque at all.
__________________
1986.5 SE-V6 4X4 D21 Hardbody
Pacesetter Long Tube Headers
Morimoto Mini D2S HID Projectors and Hella 500s
VG33i
Deerhurst is offline   Reply With Quote
Old 12-20-2020, 01:35 AM   #4
Totalld21
 
Totalld21's Avatar
 
Join Date: Mar 2017
Location: British Columbia
Posts: 118
Vehicle: 1996 d21 xe, 4x4, v6
Thanks: 1
Thanked 2 Times in 2 Posts
Default

Quote:
Originally Posted by Deerhurst View Post
I've only ever had vaccum leaks cause me bad idle issues.



I'd pull codes, if 55 then check for vacuum leaks and confirm timing. When I had my timing set poorly it had no torque at all.
Your on tbi tho right? Or did u switch over?
Totalld21 is offline   Reply With Quote
Old 12-20-2020, 03:57 AM   #5
dvdswan
Super Moderator
 
dvdswan's Avatar
 
Join Date: Mar 2009
Location: Port Orchard, WA
Posts: 5,149
Vehicle: 96 HB
Thanks: 165
Thanked 735 Times in 648 Posts
Default

have you checked the air filter or a blockage in the tube?
__________________
Dave
96 HB XE
SAS'd D44 3-link on 35s
http://www.cardomain.com/ride/2618002
dvdswan is offline   Reply With Quote
Old 12-20-2020, 04:18 AM   #6
Deerhurst
4/86 SE-V6 2 tone 4x4 HB
 
Deerhurst's Avatar
 
Join Date: Apr 2013
Location: Oregon
Posts: 7,223
Vehicle: 1986.5 SE-V6 4WD D21, 2003 Audi A4 Avant 3.0 Quattro
Thanks: 882
Thanked 861 Times in 787 Posts
Default

Quote:
Originally Posted by Totalld21 View Post
Your on tbi tho right? Or did u switch over?
I am currently TBI for now. Only difference in my original motor and your motor is the intake plenum and fuel rail. The VG33 I currently have was a MPFI motor and I just swapped on my old plenum and throttle body.
__________________
1986.5 SE-V6 4X4 D21 Hardbody
Pacesetter Long Tube Headers
Morimoto Mini D2S HID Projectors and Hella 500s
VG33i
Deerhurst is offline   Reply With Quote
Old 12-20-2020, 06:03 AM   #7
XoXSciFiGuy
 
XoXSciFiGuy's Avatar
 
Join Date: May 2017
Location: Auburn, WA
Posts: 2,970
Vehicle: 1997 D21 King Cab XE 2WD, 1998 Pathfinder.
Thanks: 193
Thanked 534 Times in 486 Posts
Default

The FIRST video...the one where the engine runs really rough...that sounded like a massive vacuum leak somewhere. Engine was falling flat on its face when revving it, and the black powder is unburned fuel. Have you checked your injectors? Or had vacuum leak check?

Look....if this becomes too much for you...your best bet is to have the engine diagnosed by a shop that knows what the hell they are really doing with these trucks. And that list of 'who can really do it,' is a damn short list these days. All foreign auto shops will tell you, "Sure, we can do it." but more often than not they can't. I quit going to them and found a domestic shop that CAN do hardbody engines very well. You have to screen these guys real good. Sometime on the phone, sometimes in person, and pin them down on whether they can diagnosis these trucks for real or NOT.

But when you do this, you also have to do a trick on the shop to ensure they really give you an accurate diagnosis. Otherwise they will just do a quick check, and an uninformed bid. Trust me on this one.

Once you find the right shop, you tell them THIS:

You want a complete diagnosis, and if the price isn't TOO high, that THEY will be doing the fixing. You want a bid for fixing, too.

This way, you will get a full bid and a complete diagnosis FOR REAL. Make sure you get a paper from them saying all that is wrong, and the costs for fixing...right?

Then...when you pick up the truck...you make an excuse that you will have to wait for the money to fix it. Take your full-bore diagnosis on paper...and LEAVE.

Go home and fix the truck yourself. This technique works very well to get an accurate diagnosis, otherwise sometimes they just blow you off a bit and give you the REAL bid when you commit to a fix. By doing what I said back there...you can go AROUND all that crap and find out what's REALLY wrong. NEVER tell a repair shop that you want ONLY a diagnosis, and that YOU will fix it. NEVER DO THIS.

Expect to pay about $100-150, although some of the really good shops will tell you everything for nothing. Make sure you take a small notebook and pen with you in any case, just to make notes.
__________________

1997 King Cab XE, 5-sp, canopy, AC/PS, KA24E, 128,000 miles. Need a technical manual? Drop me a message. Chilton's for amateurs.

Last edited by XoXSciFiGuy; 12-20-2020 at 06:11 AM.
XoXSciFiGuy is offline   Reply With Quote
Old 12-20-2020, 02:57 PM   #8
rbourgeo
 
rbourgeo's Avatar
 
Join Date: Mar 2020
Location: British Columbia, Canada
Posts: 92
Vehicle: 1996 D21
Thanks: 29
Thanked 12 Times in 11 Posts
Default

Fellow British Columbian!

My V6 intermittently did the same. But not all the time.
After checking the codes as they mention above- replace the ignition coil. I got one about $40 off amazon, and no issues since.

That being said, the suggestions of vacuum leaks and air blockages in air filter.
rbourgeo is offline   Reply With Quote
Old 12-20-2020, 04:35 PM   #9
Totalld21
 
Totalld21's Avatar
 
Join Date: Mar 2017
Location: British Columbia
Posts: 118
Vehicle: 1996 d21 xe, 4x4, v6
Thanks: 1
Thanked 2 Times in 2 Posts
Default

Quote:
Originally Posted by rbourgeo View Post
Fellow British Columbian!

My V6 intermittently did the same. But not all the time.
After checking the codes as they mention above- replace the ignition coil. I got one about $40 off amazon, and no issues since.

That being said, the suggestions of vacuum leaks and air blockages in air filter.
Did your ecu throw out a code for an ignition coil?

I honestly think its an injector at this point as my fuel pressure regulator failed on me and might have introduced debris in my fuel system clogging my injectors. Thats just my theory tho, gonna pull the injectors and give them a look over.

Can you clean up injectors or is it better just to buy new? Damn things are pricey!
Totalld21 is offline   Reply With Quote
Old 12-20-2020, 06:32 PM   #10
PorknBeans
 
Join Date: Dec 2019
Location: Where I can see the air I breathe...
Posts: 200
Vehicle: Original owner of my 3-pdl 1997 Nissan Hardbody King Cab XE 2WD 5-spd.
Thanks: 19
Thanked 62 Times in 48 Posts
Default

Get a code reader, plug it into the port under the left side of the driver dash, pull the code(s), research code(s) and begins to troubleshoot using the trouble diagnosis flow sheets and go through EVERY vacuum hose located on the engine. Replace ONE BY ONE until they are all replaced. There is also a a base gasket on the bottom of the throttle body that needs to be replaced to prevent a vacuum leak also.

Take a digital meter and CAREFULLY unlock the harness connectors to the fuel injectors and measure the resistance between each pin on the injectors.

https://www.nicoclub.com/service-man...Truck%2Fec.pdf

EC-280 is where the injector tests begin for Non-Detectable items(no code(s) for injector failure(s)).
__________________
PorknBeans is offline   Reply With Quote
Thanked by:
jp2code (12-20-2020)
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 05:05 PM.


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