1. Welcome to Tacoma World!

    You are currently viewing as a guest! To get full-access, you need to register for a FREE account.

    As a registered member, you’ll be able to:
    • Participate in all Tacoma discussion topics
    • Communicate privately with other Tacoma owners from around the world
    • Post your own photos in our Members Gallery
    • Access all special features of the site

P0301 Cylinder 1 Misfire

Discussion in '1st Gen. Tacomas (1995-2004)' started by jgmilton, Feb 10, 2020.

  1. Feb 10, 2020 at 6:20 AM
    #1
    jgmilton

    jgmilton [OP] Member

    Joined:
    Apr 26, 2018
    Member:
    #251726
    Messages:
    10
    Gender:
    Male
    Vehicle:
    1996 4wd Tacoma
    I have a P0301 that will not disappear on a 96 Tacoma 5VZFE,3.4.
    After a month of replacing everything on the outside of the engine that could possibly be related (Plugs, wires, alternator, air intake tube, everything except the coil pack, but switched it to another cylinder, P0301 was still there).
    At that point I replaced the head on the right side of the engine with a remanufactured head, still no luck.

    Any other thoughts?
     
    wilcam47 likes this.
  2. Feb 10, 2020 at 6:54 AM
    #2
    TACO_GUY03

    TACO_GUY03 Active Member

    Joined:
    Feb 4, 2020
    Member:
    #318229
    Messages:
    28
    Gender:
    Male
    Houston, TX
    Vehicle:
    03 Tacoma xtra-cab 4x4 v6 & 94 Soup turbo gte MK4
    Have you replaced ignition coils? That might be it if you haven’t....

    My mistake I see what you typed.. but you should replace the ignition coils but I know they’re a lot of money
     
  3. Feb 10, 2020 at 6:56 AM
    #3
    Crfdude86

    Crfdude86 Well-Known Member

    Joined:
    Nov 24, 2014
    Member:
    #142996
    Messages:
    54
    Gender:
    Male
    I would start with new plugs first.
     
    TACO_GUY03 likes this.
  4. Feb 10, 2020 at 6:59 AM
    #4
    TACO_GUY03

    TACO_GUY03 Active Member

    Joined:
    Feb 4, 2020
    Member:
    #318229
    Messages:
    28
    Gender:
    Male
    Houston, TX
    Vehicle:
    03 Tacoma xtra-cab 4x4 v6 & 94 Soup turbo gte MK4
    A few weeks ago I was having problems with one of my cylinders my truck was vibrating a lot. So I went to autozone and they told me I had to replace the spark plugs so I did. But it kept vibrating so I just change the spark plug wire and it stopped and now it runs way better
     
    wilcam47 likes this.
  5. Feb 10, 2020 at 7:02 AM
    #5
    Glamisman

    Glamisman Well-Known Member

    Joined:
    Oct 22, 2016
    Member:
    #200436
    Messages:
    2,881
    Gender:
    Male
    is there a sealing/compression problem in #1. I would preform leak down test to see if there is. If this test shows good sealing I would examine the camshafts really well. Did the new head come with its own camshafts or did you transfer yours to the new head?
     
  6. Feb 10, 2020 at 7:06 AM
    #6
    Texoma

    Texoma IG: Triple C Chop Shop

    Joined:
    Feb 1, 2011
    Member:
    #50374
    Messages:
    16,173
    Gender:
    Male
    First Name:
    Chris(Topher)
    Lago Vista, TX
    Vehicle:
    10 Taco 4x4
    A bunch a cool stickers, a bada ass MetalMiller Tx Longhorns grill emblem painted Hemi Orange, JBA long tube headers with o2 sims, Diff breather mod, Red LED interior lights, Fancy head unit that plays ipod n movies, Also DIY install factory stuff like, factory cruise control, factory intermittent wipers, OME nitro struts with 886x springs and toy tec top plate, JBA high caster UCA's for better alignmnet and dey beefier too, Old Man Emu Dakar leaf springs in da rear with the gear, U bolt flipper, Ivan Stewart TRD rims with 33" K Bro 2's, some bad ass weather tech floor liners so I don't muck up my interior, an ATO shackle flipper for mo travel in da rear wit the gear, also super shiny Fox 2.0 shocks back there too, all sorts of steal armor for bouncing off of the rocks like demello sliders, AP front skid, trans skid, n transfer skid, demello gas tank skid, and a tough as nails ARB bumper with warn 8k winch, I'm sure there's more
    Alot of times this is related to the incorrect spark plugs. You need the double prong plugs as depicted in the little picture on the engine. Owners manual gives the correct Denso PN, or you can get the plugs from the dealership.
     
    wilcam47 and TACO_GUY03 like this.
  7. Feb 10, 2020 at 8:22 AM
    #7
    jgmilton

    jgmilton [OP] Member

    Joined:
    Apr 26, 2018
    Member:
    #251726
    Messages:
    10
    Gender:
    Male
    Vehicle:
    1996 4wd Tacoma
    I have replaced the Bosch plugs with NGK plugs, the plug wires are new.
    Did a compression test before replacing the head. all was fine. Swapped the coil packs on cyl. 1 and 3 to verify coil was good.
    Misfire still on cyl 1.
     
  8. Feb 10, 2020 at 10:25 AM
    #8
    jgmilton

    jgmilton [OP] Member

    Joined:
    Apr 26, 2018
    Member:
    #251726
    Messages:
    10
    Gender:
    Male
    Vehicle:
    1996 4wd Tacoma
    Camshafts were moved to the new head.
     
  9. Feb 10, 2020 at 10:27 AM
    #9
    Texoma

    Texoma IG: Triple C Chop Shop

    Joined:
    Feb 1, 2011
    Member:
    #50374
    Messages:
    16,173
    Gender:
    Male
    First Name:
    Chris(Topher)
    Lago Vista, TX
    Vehicle:
    10 Taco 4x4
    A bunch a cool stickers, a bada ass MetalMiller Tx Longhorns grill emblem painted Hemi Orange, JBA long tube headers with o2 sims, Diff breather mod, Red LED interior lights, Fancy head unit that plays ipod n movies, Also DIY install factory stuff like, factory cruise control, factory intermittent wipers, OME nitro struts with 886x springs and toy tec top plate, JBA high caster UCA's for better alignmnet and dey beefier too, Old Man Emu Dakar leaf springs in da rear with the gear, U bolt flipper, Ivan Stewart TRD rims with 33" K Bro 2's, some bad ass weather tech floor liners so I don't muck up my interior, an ATO shackle flipper for mo travel in da rear wit the gear, also super shiny Fox 2.0 shocks back there too, all sorts of steal armor for bouncing off of the rocks like demello sliders, AP front skid, trans skid, n transfer skid, demello gas tank skid, and a tough as nails ARB bumper with warn 8k winch, I'm sure there's more
    Which NGK plugs? There are specific plugs that the 3.4L needs to operate correctly.
     
  10. Feb 10, 2020 at 2:02 PM
    #10
    jgmilton

    jgmilton [OP] Member

    Joined:
    Apr 26, 2018
    Member:
    #251726
    Messages:
    10
    Gender:
    Male
    Vehicle:
    1996 4wd Tacoma
  11. Feb 10, 2020 at 2:25 PM
    #11
    Texoma

    Texoma IG: Triple C Chop Shop

    Joined:
    Feb 1, 2011
    Member:
    #50374
    Messages:
    16,173
    Gender:
    Male
    First Name:
    Chris(Topher)
    Lago Vista, TX
    Vehicle:
    10 Taco 4x4
    A bunch a cool stickers, a bada ass MetalMiller Tx Longhorns grill emblem painted Hemi Orange, JBA long tube headers with o2 sims, Diff breather mod, Red LED interior lights, Fancy head unit that plays ipod n movies, Also DIY install factory stuff like, factory cruise control, factory intermittent wipers, OME nitro struts with 886x springs and toy tec top plate, JBA high caster UCA's for better alignmnet and dey beefier too, Old Man Emu Dakar leaf springs in da rear with the gear, U bolt flipper, Ivan Stewart TRD rims with 33" K Bro 2's, some bad ass weather tech floor liners so I don't muck up my interior, an ATO shackle flipper for mo travel in da rear wit the gear, also super shiny Fox 2.0 shocks back there too, all sorts of steal armor for bouncing off of the rocks like demello sliders, AP front skid, trans skid, n transfer skid, demello gas tank skid, and a tough as nails ARB bumper with warn 8k winch, I'm sure there's more
    wilcam47 likes this.
  12. Feb 10, 2020 at 2:27 PM
    #12
    Texoma

    Texoma IG: Triple C Chop Shop

    Joined:
    Feb 1, 2011
    Member:
    #50374
    Messages:
    16,173
    Gender:
    Male
    First Name:
    Chris(Topher)
    Lago Vista, TX
    Vehicle:
    10 Taco 4x4
    A bunch a cool stickers, a bada ass MetalMiller Tx Longhorns grill emblem painted Hemi Orange, JBA long tube headers with o2 sims, Diff breather mod, Red LED interior lights, Fancy head unit that plays ipod n movies, Also DIY install factory stuff like, factory cruise control, factory intermittent wipers, OME nitro struts with 886x springs and toy tec top plate, JBA high caster UCA's for better alignmnet and dey beefier too, Old Man Emu Dakar leaf springs in da rear with the gear, U bolt flipper, Ivan Stewart TRD rims with 33" K Bro 2's, some bad ass weather tech floor liners so I don't muck up my interior, an ATO shackle flipper for mo travel in da rear wit the gear, also super shiny Fox 2.0 shocks back there too, all sorts of steal armor for bouncing off of the rocks like demello sliders, AP front skid, trans skid, n transfer skid, demello gas tank skid, and a tough as nails ARB bumper with warn 8k winch, I'm sure there's more
  13. Feb 10, 2020 at 3:02 PM
    #13
    jgmilton

    jgmilton [OP] Member

    Joined:
    Apr 26, 2018
    Member:
    #251726
    Messages:
    10
    Gender:
    Male
    Vehicle:
    1996 4wd Tacoma
    That is what I put in the truck.

    20200210_165646.jpg
     
  14. Feb 10, 2020 at 3:18 PM
    #14
    vasinvictor

    vasinvictor Junkie

    Joined:
    Sep 23, 2014
    Member:
    #138933
    Messages:
    827
    Gender:
    Male
    First Name:
    Drew
    Arkansas
    Vehicle:
    '01 DCSB racetruck
    GT35 turbo, AEM F/IC, Transgo, custom converter, CalTracs, Elocker, 2-4" drop, 255/55r18 street, 255/60r16 M&H Racemasters, 7.8 at 93
    Spark plugs are pretty dumb. They fire, life goes on, mostly. I've use single electrode, double, triple, and quad ground strap. They work fine. This will not be your problem.
    Coils almost never go bad. Again, they are so simple and dumb.
    You didn't mention anything about injectors. I'm betting you have 200-250k miles. 1 or 2 injectors go bad at this age. This is what I'd be betting on. Might test wire continuity too, to make sure you don't have a broken wire going to that injector.
     
    wilcam47 likes this.
  15. Feb 10, 2020 at 3:45 PM
    #15
    Good deal

    Good deal Well-Known Member

    Joined:
    Oct 16, 2017
    Member:
    #233193
    Messages:
    86
    Gender:
    Male
    Texas
    Injectors!
     
  16. Feb 10, 2020 at 3:48 PM
    #16
    jgmilton

    jgmilton [OP] Member

    Joined:
    Apr 26, 2018
    Member:
    #251726
    Messages:
    10
    Gender:
    Male
    Vehicle:
    1996 4wd Tacoma
    Cylinder 1 injector is new.
    One of the first thing I did.
     
  17. Feb 10, 2020 at 3:50 PM
    #17
    jgmilton

    jgmilton [OP] Member

    Joined:
    Apr 26, 2018
    Member:
    #251726
    Messages:
    10
    Gender:
    Male
    Vehicle:
    1996 4wd Tacoma
    150,000 miles
     
  18. Feb 10, 2020 at 3:50 PM
    #18
    vasinvictor

    vasinvictor Junkie

    Joined:
    Sep 23, 2014
    Member:
    #138933
    Messages:
    827
    Gender:
    Male
    First Name:
    Drew
    Arkansas
    Vehicle:
    '01 DCSB racetruck
    GT35 turbo, AEM F/IC, Transgo, custom converter, CalTracs, Elocker, 2-4" drop, 255/55r18 street, 255/60r16 M&H Racemasters, 7.8 at 93
    well I could have saved myself a bunch of typing if you had mentioned that LOL

    Check out your wiring continuity from the ECU plug to the injector?
     
    wilcam47 likes this.
  19. Feb 10, 2020 at 5:12 PM
    #19
    Texoma

    Texoma IG: Triple C Chop Shop

    Joined:
    Feb 1, 2011
    Member:
    #50374
    Messages:
    16,173
    Gender:
    Male
    First Name:
    Chris(Topher)
    Lago Vista, TX
    Vehicle:
    10 Taco 4x4
    A bunch a cool stickers, a bada ass MetalMiller Tx Longhorns grill emblem painted Hemi Orange, JBA long tube headers with o2 sims, Diff breather mod, Red LED interior lights, Fancy head unit that plays ipod n movies, Also DIY install factory stuff like, factory cruise control, factory intermittent wipers, OME nitro struts with 886x springs and toy tec top plate, JBA high caster UCA's for better alignmnet and dey beefier too, Old Man Emu Dakar leaf springs in da rear with the gear, U bolt flipper, Ivan Stewart TRD rims with 33" K Bro 2's, some bad ass weather tech floor liners so I don't muck up my interior, an ATO shackle flipper for mo travel in da rear wit the gear, also super shiny Fox 2.0 shocks back there too, all sorts of steal armor for bouncing off of the rocks like demello sliders, AP front skid, trans skid, n transfer skid, demello gas tank skid, and a tough as nails ARB bumper with warn 8k winch, I'm sure there's more
    Right, 3967 is the correct ones. 5464 are incorrect.
     

Products Discussed in

To Top