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

Reply
 
Thread Tools Display Modes
Old 07-02-2022, 05:13 PM   #11
hstuder
 
hstuder's Avatar
 
Join Date: Dec 2021
Location: St. Albert, Alberta, Canada
Posts: 80
Vehicle: 1990 King Cab 2.4 RWD 5spd
Thanks: 11
Thanked 14 Times in 10 Posts
Default

Quote:
Originally Posted by jp2code View Post
Check the resistance across the injectors. Each should have about 10 to 12 Ohms
All injectors are 11.7 ohms, just finished testing.
__________________
1990 Farmbody | KA24E, 5spd, King Cab, RWD
hstuder is offline   Reply With Quote
Thanked by:
jp2code (07-02-2022)
Old 07-02-2022, 05:15 PM   #12
jp2code
Software Developer
 
jp2code's Avatar
 
Join Date: Dec 2011
Location: Longview, TX [USA]
Age: 52
Posts: 11,247
Vehicle: 94 LB 2x4 Manual VG33e
Thanks: 1,844
Thanked 1,834 Times in 1,596 Posts
Default

Quote:
Originally Posted by hstuder View Post
All injectors are 11.7 ohms, just finished testing.
Well, that's good. Injectors aren't cheap.

So it's something else. How do the plugs look? Are 2 and 3 noticeably different from the rest?
__________________
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 07-02-2022, 05:21 PM   #13
hstuder
 
hstuder's Avatar
 
Join Date: Dec 2021
Location: St. Albert, Alberta, Canada
Posts: 80
Vehicle: 1990 King Cab 2.4 RWD 5spd
Thanks: 11
Thanked 14 Times in 10 Posts
Default

Quote:
Originally Posted by jp2code View Post
Well, that's good. Injectors aren't cheap.

So it's something else. How do the plugs look? Are 2 and 3 noticeably different from the rest?
3 is a little black but that could just be from the driving that's been done since the issue came up. Plugs are only less than 7 months old.

I'm in the process of trying to figure out how to check timing on these trucks lol
__________________
1990 Farmbody | KA24E, 5spd, King Cab, RWD
hstuder is offline   Reply With Quote
Old 07-02-2022, 05:36 PM   #14
hstuder
 
hstuder's Avatar
 
Join Date: Dec 2021
Location: St. Albert, Alberta, Canada
Posts: 80
Vehicle: 1990 King Cab 2.4 RWD 5spd
Thanks: 11
Thanked 14 Times in 10 Posts
Default

This is a timing light photo. Truck is pretty much fully warm at this point and the timing seems to have settled here.

__________________
1990 Farmbody | KA24E, 5spd, King Cab, RWD

Last edited by jp2code; 07-02-2022 at 06:22 PM.
hstuder is offline   Reply With Quote
Old 07-02-2022, 06:27 PM   #15
jp2code
Software Developer
 
jp2code's Avatar
 
Join Date: Dec 2011
Location: Longview, TX [USA]
Age: 52
Posts: 11,247
Vehicle: 94 LB 2x4 Manual VG33e
Thanks: 1,844
Thanked 1,834 Times in 1,596 Posts
Default

I don't know why Imgur makes it so difficult to share links using their mobile app. I had to go to the PC to embed your image.

Anyway, have you done the timing before? You probably do, but here is a little 5-minute video to give you an idea of how to do that.


Link: YouTube K5SUAhTEIwE
__________________
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 07-02-2022, 07:03 PM   #16
hstuder
 
hstuder's Avatar
 
Join Date: Dec 2021
Location: St. Albert, Alberta, Canada
Posts: 80
Vehicle: 1990 King Cab 2.4 RWD 5spd
Thanks: 11
Thanked 14 Times in 10 Posts
Default

Quote:
Originally Posted by jp2code View Post
I don't know why Imgur makes it so difficult to share links using their mobile app. I had to go to the PC to embed your image.

Anyway, have you done the timing before? You probably do, but here is a little 5-minute video to give you an idea of how to do that.
Yeah not sure what the issue with imgur is there. It always works for me on these kinds of forums, on reddit, etc so that's why I use it instead of photobucket or something else.

Anyways, so I figured out what the timing marks are on the pulley. Apparently they're -5, 0, +5, +10, +15, +20. I was past the +20 mark. So I dialed that back...the truck seemed to run the smoothest at approx +12 so I left it there. But that still didn't fix the issue. Sorta running out of ideas.

Decided to do a compression test as a last resort. Unplugged each injector and went to town.
  1. Cyl 1 - 128
  2. Cyl 2 - 30
  3. Cyl 3 - 30
  4. Cyl 4 - 120
So I'm guessing this means the HG is blown, especially between Cyl 2 and 3.

Time to rethink my life, I guess:
  • Repair HG on this KA, or
  • Swap in 4.3, 4.8, or 5.3
__________________
1990 Farmbody | KA24E, 5spd, King Cab, RWD
hstuder is offline   Reply With Quote
Old 07-02-2022, 08:21 PM   #17
jp2code
Software Developer
 
jp2code's Avatar
 
Join Date: Dec 2011
Location: Longview, TX [USA]
Age: 52
Posts: 11,247
Vehicle: 94 LB 2x4 Manual VG33e
Thanks: 1,844
Thanked 1,834 Times in 1,596 Posts
Default

Swapping a head gasket would be a lot less work. You can still plan on a SBC swap later.
__________________
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 07-02-2022, 08:42 PM   #18
hstuder
 
hstuder's Avatar
 
Join Date: Dec 2021
Location: St. Albert, Alberta, Canada
Posts: 80
Vehicle: 1990 King Cab 2.4 RWD 5spd
Thanks: 11
Thanked 14 Times in 10 Posts
Default

Quote:
Originally Posted by jp2code View Post
Swapping a head gasket would be a lot less work. You can still plan on a SBC swap later.
I'm also not 100% sure that it would be a HG. I assume there could be other reason why compression might be low. Rings, or whatever else. I'm not sure.

If the timing chain jumped a tooth or two, I assume that wouldn't lead me to a situation where I'm only getting 30 psi on Cyl 2 and 3?
__________________
1990 Farmbody | KA24E, 5spd, King Cab, RWD
hstuder is offline   Reply With Quote
Old 07-02-2022, 10:01 PM   #19
jp2code
Software Developer
 
jp2code's Avatar
 
Join Date: Dec 2011
Location: Longview, TX [USA]
Age: 52
Posts: 11,247
Vehicle: 94 LB 2x4 Manual VG33e
Thanks: 1,844
Thanked 1,834 Times in 1,596 Posts
Default

Quote:
Originally Posted by hstuder View Post
I'm also not 100% sure that it would be a HG. I assume there could be other reason why compression might be low. Rings, or whatever else. I'm not sure.

If the timing chain jumped a tooth or two, I assume that wouldn't lead me to a situation where I'm only getting 30 psi on Cyl 2 and 3?
Blowing a head gasket is common.
__________________
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 07-03-2022, 12:31 AM   #20
hstuder
 
hstuder's Avatar
 
Join Date: Dec 2021
Location: St. Albert, Alberta, Canada
Posts: 80
Vehicle: 1990 King Cab 2.4 RWD 5spd
Thanks: 11
Thanked 14 Times in 10 Posts
Default

Quote:
Originally Posted by jp2code View Post
Blowing a head gasket is common.
I assume if the HG is just blown between cyl 2 and 3, that means there wouldn't be coolant in the oil? Any other way for me to verify the HG before pulling it apart?
__________________
1990 Farmbody | KA24E, 5spd, King Cab, RWD
hstuder 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 07:41 PM.


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