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

Reply
 
Thread Tools Display Modes
Old 11-28-2017, 08:23 PM   #1
90HardbodyPOS
 
Join Date: Nov 2017
Location: Sanford, NC
Posts: 4
Vehicle: 1990 Nissan Hardbody
Thanks: 0
Thanked 1 Time in 1 Post
Default 1990 Nissan pickup 4Cyl running badly...

Hey everyone, I'm new to the forums here. What I have is turning into an expensive habit. The truck runs smoothly when cold but idles high and low up and down. Once it reaches temperature it begins to sputter and miss like it's not firing or possibly fuel pump issue? I'm not sure.I've installed new mass air flow sensor, O2 sensor, spark plugs and wires, distributor cap, oil change & filter, fuel filter and fuel system treatment And still no relief. I will say with each new part it runs better but not drivable due to lack of power. I was able to run diagnostics and produce a code which was (41) air cleaner temp sensor. I have one ordered but just looking for further help from people who know the vehicles well. Any advice would be greatly appreciated.
90HardbodyPOS is offline   Reply With Quote
Old 11-28-2017, 08:36 PM   #2
street_rulerr
 
Join Date: Nov 2015
Location: West Coast
Posts: 1,425
Vehicle: 1996 4x4 5spd
Thanks: 0
Thanked 101 Times in 98 Posts
Default

sounds like a vacuum leak to me. i left my sensor unplugged for a whole day last weeki and it didnt nearly make that big of a difference. in fact i think the only thing it did was turn on the light in the dash
street_rulerr is offline   Reply With Quote
Old 11-28-2017, 08:37 PM   #3
SBJ
Total Buzzkill
 
Join Date: Nov 2016
Location: WA
Posts: 1,121
Vehicle: '90 D21 4cyl 5spd 2wd
Thanks: 112
Thanked 123 Times in 112 Posts
Default

Can confirm. Mine will run just fine with the sensor unplugged. Also, there is a sticky on here somewhere about opening up the main wiring harness and re-soldering the connections that power the fuel injectors. It made a world of difference in mine.

Last edited by SBJ; 11-28-2017 at 08:45 PM.
SBJ is offline   Reply With Quote
Old 11-28-2017, 11:37 PM   #4
91nissan94
 
91nissan94's Avatar
 
Join Date: Sep 2008
Location: Crescent City FL
Posts: 1,195
Vehicle: 91nissan hb
Thanks: 44
Thanked 92 Times in 85 Posts
Default

Have you checked your timing?
91nissan94 is offline   Reply With Quote
Old 11-28-2017, 11:39 PM   #5
90HardbodyPOS
 
Join Date: Nov 2017
Location: Sanford, NC
Posts: 4
Vehicle: 1990 Nissan Hardbody
Thanks: 0
Thanked 1 Time in 1 Post
Default

Thanks for the advice. I'm still in the process of going through everything and have noticed some dry rotted vac hoses. I'm all for buying and replacing rubbers where they are needed.
90HardbodyPOS is offline   Reply With Quote
Old 11-28-2017, 11:40 PM   #6
90HardbodyPOS
 
Join Date: Nov 2017
Location: Sanford, NC
Posts: 4
Vehicle: 1990 Nissan Hardbody
Thanks: 0
Thanked 1 Time in 1 Post
Default

And no 91nissan94 have not
90HardbodyPOS is offline   Reply With Quote
Old 11-29-2017, 01:53 AM   #7
Deerhurst
4/86 SE-V6 2 tone 4x4 HB
 
Deerhurst's Avatar
 
Join Date: Apr 2013
Location: Oregon
Posts: 4,494
Vehicle: 1986.5 Hardbody
Thanks: 620
Thanked 397 Times in 372 Posts
Default

Im mirroring what the gurus above say, timing, vacuum leaks and the wiring issue for the injectors.
__________________
1986.5 SE-V6 4X4 D21 Hardbody
Pacesetter Long Tube Headers
Morimoto Mini D2S HID Projectors and Hella 500s
Deerhurst is online now   Reply With Quote
Old 11-29-2017, 02:35 AM   #8
cadillacdude1975
The Gear Jammer
 
cadillacdude1975's Avatar
 
Join Date: Apr 2013
Location: Chattanooga, TN
Age: 45
Posts: 7,830
Vehicle: 87 D21 SE KC V6 2wd 5sp & 86.5 V6 SE auto
Thanks: 261
Thanked 833 Times in 776 Posts
Default

dont think that sensor would cause that problem, but then again who knows.
__________________
"Im officially lost" - wildbill
cadillacdude1975 is offline   Reply With Quote
Old 11-29-2017, 02:47 AM   #9
91nissan94
 
91nissan94's Avatar
 
Join Date: Sep 2008
Location: Crescent City FL
Posts: 1,195
Vehicle: 91nissan hb
Thanks: 44
Thanked 92 Times in 85 Posts
Default

I ran without one for years with no noticable effects.
91nissan94 is offline   Reply With Quote
Old 11-29-2017, 05:01 AM   #10
XoXSciFiGuy
 
XoXSciFiGuy's Avatar
 
Join Date: May 2017
Location: Auburn, WA
Posts: 376
Vehicle: 1988 Nissan HB 2WD
Thanks: 9
Thanked 36 Times in 33 Posts
Default

I had this same problem...started up...warmed a bit...then starting hunting/surging idle up and down. Sometimes fell on its face and died at stop signs, otherwise ran great on the freeway. For a while, I turned up the idle a bit to prevent the falling flat.

Truck completely diagnosed by a very good foreign shop that uses a pro Nissan mechanic.

Mechanic says leak in throttle body gasket. They did the smoke test on the machine, too.
__________________
88 D21, 5-sp, PS, AC, 162K, 2.4 TBI. Slider window, bucket seats, sunroof, bedliner. Nickname: 'Fifty Shades of Gray'.
XoXSciFiGuy 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 11:36 PM.


Powered by vBulletin® Version 3.8.6
Copyright ©2000 - 2018, Jelsoft Enterprises Ltd.