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

Reply
 
Thread Tools Display Modes
Old 11-29-2018, 03:35 AM   #1
1madmouse
1madmouse
 
1madmouse's Avatar
 
Join Date: Oct 2015
Location: Redding,CA<USA
Age: 67
Posts: 88
Vehicle: Nissan D21 1991,standard cab 4cyl 5spd
Thanks: 23
Thanked 15 Times in 12 Posts
Default not the same as before

Ok recently replaced the fuel pump on my 91 D21 with the 4cyl. It has not seemed the same since, but ran ok. Started running funny like fouled plug for a minute then clear up, then stumble when take off from a light. Changed the plugs, and fuel filter again and it seemed to be better. Then I changed the rotor and cap today and it starts missing like a fouled plug.Now its running all stupid like a fouled plug then ok, then missing again. I need this thing to be dependable and not be running like this. I have replaced plugs, cap , rotor, fuel filter, and plug wires all look good. can't figure why it would start this stuff. Has about 172,000 on it and has been great up until now.
Anyone have any ideas why or what to check? Injectors? sensors?
1madmouse is offline   Reply With Quote
Old 11-29-2018, 07:06 AM   #2
1madmouse
1madmouse
 
1madmouse's Avatar
 
Join Date: Oct 2015
Location: Redding,CA<USA
Age: 67
Posts: 88
Vehicle: Nissan D21 1991,standard cab 4cyl 5spd
Thanks: 23
Thanked 15 Times in 12 Posts
Default

I would have to say first time I put in new parts and the darn thing runs worse. This has me scratching my head for sure.Haven't really changed much from stock, stereo and amp are run separate and relayed. The 2 12" Kickers are run through the amp and head unit. Checked the ECU no codes just 55.
1madmouse is offline   Reply With Quote
Old 11-29-2018, 09:30 AM   #3
h.stickeye
Banned
 
Join Date: Nov 2014
Location: _
Posts: 1,495
Vehicle: _
Thanks: 255
Thanked 197 Times in 170 Posts
Default

this is a condition i call 'princess syndrome'. Once your truck realises it should be treated much better, it gets pissed how little you did for it in the previous years.

In all seriousness I would start with timing, injectors and intake leak.

When you replaced the rotor did you do it properly? It might not hurt to recheck that, its a fairly easy and common mistake to make.
h.stickeye is offline   Reply With Quote
Old 11-29-2018, 10:04 AM   #4
XoXSciFiGuy
 
XoXSciFiGuy's Avatar
 
Join Date: May 2017
Location: Auburn, WA
Posts: 2,363
Vehicle: 1997 D21 King Cab XE 2WD, 1998 Pathfinder.
Thanks: 151
Thanked 413 Times in 378 Posts
Default

Sounds like problem started after pump replacement. Maybe something a bit off there.
__________________

1997 King Cab XE, 5-sp, canopy, AC/PS, KA24E, 120,000 miles. Need a technical manual? Drop me a message. Chilton's for amateurs.
XoXSciFiGuy is offline   Reply With Quote
Old 11-29-2018, 11:34 AM   #5
jp2code
Software Developer
 
jp2code's Avatar
 
Join Date: Dec 2011
Location: Longview, TX [USA]
Age: 50
Posts: 9,530
Vehicle: 94 LB 2x4 Manual VG33e
Thanks: 1,490
Thanked 1,269 Times in 1,118 Posts
Default

Quote:
Originally Posted by h.stickeye View Post
When you replaced the rotor did you do it properly? It might not hurt to recheck that, its a fairly easy and common mistake to make.
I've done that. It makes me feel stupid, but I've done it.

Also, check that each spark plug wire is actually seated on the plug.

Another thing you could check is pulling plugs off one at a time while the engine is running to see if you can isolate what cylinder is giving you grief.
__________________
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 11-29-2018, 03:30 PM   #6
OldGreyBeast
1986.5 HB 4x4 3.0V6
 
OldGreyBeast's Avatar
 
Join Date: Mar 2012
Location: North AL
Age: 32
Posts: 3,834
Vehicle: 1986.5 Nissan D21, 1987 Mercedes 190D Turbo, 2010 Mercedes E350 AWD, 2017 Honda CBR500R
Thanks: 357
Thanked 469 Times in 409 Posts
Default

Also check that fuel pump. Disconnect the fuel line from the injectors and run it into a large clear container (like a 2 litre bottle or some such). Turn the fuel pump on and see if the fuel is coming out proper or if it's sputtering around or just trickling out. May be that the new pump you put in is borked.
__________________
Build log for the Beast - https://beastbuildlog.blogspot.com - Last Updated 18 OCT 2016
1986.5 FSM GI section - https://imgur.com/gallery/mjT18bV

OldGreyBeast is offline   Reply With Quote
Old 11-30-2018, 04:12 AM   #7
1madmouse
1madmouse
 
1madmouse's Avatar
 
Join Date: Oct 2015
Location: Redding,CA<USA
Age: 67
Posts: 88
Vehicle: Nissan D21 1991,standard cab 4cyl 5spd
Thanks: 23
Thanked 15 Times in 12 Posts
Default

Ok I got worried about the new cap and rotor, I know I installed them right , but reinstalled the old ones to make sure and it didn't miss, so maybe a bad part. I tried pulling one plug wire at a time while running and couldn't tell which it was, it would miss when pulled, but pick up as soon as I got the wire close again. I am going to check the fuel flow, I think the new pump just isn't right and having 20 odd replacements doesn't help. I checked the rotor, never seen one held on by a screw, but it only goes on one way
1madmouse is offline   Reply With Quote
Old 11-30-2018, 04:22 AM   #8
h.stickeye
Banned
 
Join Date: Nov 2014
Location: _
Posts: 1,495
Vehicle: _
Thanks: 255
Thanked 197 Times in 170 Posts
Default

I know how u feel. This is part of the reason I do only one or two replacements at a time. I hate doing the 'new parts boogey'.
h.stickeye is offline   Reply With Quote
Old 11-30-2018, 04:36 AM   #9
SBJ
Total Buzzkill
 
Join Date: Nov 2016
Location: OR
Posts: 2,615
Vehicle: '90 D21 4cyl 5spd 2wd
Thanks: 291
Thanked 431 Times in 387 Posts
Default

Seconding OGB's comment above. While the fuel line is unhooked from the rail you might also consider loaning out a fuel pressure gauge from the auto parts store. I think the fuel pressure should be around 40 PSI, but don't quote me on that.
SBJ is offline   Reply With Quote
Old 11-30-2018, 06:24 AM   #10
1madmouse
1madmouse
 
1madmouse's Avatar
 
Join Date: Oct 2015
Location: Redding,CA<USA
Age: 67
Posts: 88
Vehicle: Nissan D21 1991,standard cab 4cyl 5spd
Thanks: 23
Thanked 15 Times in 12 Posts
Default

I was thinking the fuel pressure also just to be sure , then I remember smelling gas when I didn't before when the truck is in the garage. Injector leaking maybe? Now that I think back, every now and then I smell gas, but have been working on riding mowers and blowers, etc, so wrote it off as that. Maybe was gas leak, but none leaking anywhere I can see.
Thanks OGB and SBJ, I will be checking pressure at the rail and flow. Thanks everyone else I have more things to check from your input.


If i hadn't owned a Chevy LUV before owning 2 Nissans , I would think they are a big pain, but I know better. Ahh for one of my old Chevys, those were the days and I have owned over 80+ 1953 to 1993.
1madmouse 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 09:04 AM.


Powered by vBulletin® Version 3.8.6
Copyright ©2000 - 2020, Jelsoft Enterprises Ltd.