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'95 Mis-fire/"Hiccup" Please help!

Discussion in '4 Cylinder' started by Whip Chop, Oct 27, 2011.

  1. Oct 27, 2011 at 7:23 PM
    #1
    Whip Chop

    Whip Chop [OP] New Member

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    Hey everybody!

    I'm almost at my wits end chasing a problem I've had for the past month or so on my 1995 4 cyl 2.7L. This baby has 247k on it and has been like a best friend for me over the years. Up until recently she'd been running like a top with little or no issues with regular maintenance. Let me start all the way at the beginning...

    My truck stalled out at a stoplight when attempting to accelerate. Unable to restart I towed the truck to my "favorite" shop. They replaced the plugs and were able to re-start but running very poorly and throwing a number of codes. The replaced the spark plug wires, cap and rotor. I picked up the truck and that is when I noticed the "hiccup" on acceleration over 1800 rpm. I took the truck back and they performed a full pressure fuel injection and system cleaning. This did not fix the issue either and he suggested an ignition module to the tune of $400. I declined as it wasn't throwing any other codes.

    A day later the "Check Engine" light came on. I read the code and it was showing P0125 Engine Coolant temp sensor and O2 Sensor 1 Bank 1. I attempted to replace the Engine Coolant temp sensor myself but was unable to locate it. I ended up taking the truck to a different shop an they replaced the O2 sensor, it wasn't showing any other codes but still having the mis-fire/hiccup and he suggested replacing the fuel injectors.

    I replaced the injectors myself and it was still having the problem so I took it to the dealer. They found a code stating that O2 sensor 2 wasn't working and replaced. They suggested replacing the plugs, wires, cap and rotor with factory parts (NGK/Denso) as they were all after-market for $385. I declined as I had just paid to have all this replaced and they were less than a month old. This evening after some research and suggestions to make sure I had NGK brand plugs in there I pulled the plugs I had and found that they were Autolite platinums. I pulled and replaced with NGK G-Power plugs. Still having the hiccup issue although there is a *slight* improvement in that it is somewhat less-severe.

    Any help from anyone with some similar experience with this issue would be MUCH appreciated. I am very frustrated at this point and don't know what the solution is without replacing the cap, rotor, wires again into another expense. Everyone I know who has or has had a taco looks at me funny when I start contemplating selling it as I don't want to nickle and dime everything. Maybe it's time but I was hoping to get 300k at least out of it. Thanks for your time.
     
  2. Oct 27, 2011 at 7:44 PM
    #2
    XwesleysnipesX

    XwesleysnipesX Well-Known Member

    Joined:
    Oct 27, 2011
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    First Name:
    Eric
    Cincinnati, Ohio
    Vehicle:
    2.7L sr5 4x4
    Well. I had very simalir problems with my 96 2.4. It was a #of things though. Plugs and wires. Had a mouse living in the air box. Also both ox2 sensors were bad. Plus my distrubutor was bad. So good luck. And sorry to depress you. But I have 265k and it still runs like a top. Actually way more peppy than my 2.7 4x4 with 150k less miles.
     
  3. Oct 27, 2011 at 7:48 PM
    #3
    Whip Chop

    Whip Chop [OP] New Member

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    Thank you for the reply so far. I know that it can be fixed, I just wish I could narrow it down some more. I want this thing to keep purring.

    Neglected to mention, dealer checked compression, fuel pressure, fuel pump, exhaust system, etc. All checked fine. Not showing any codes at this point.
     
  4. Nov 17, 2011 at 5:36 PM
    #4
    Whip Chop

    Whip Chop [OP] New Member

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    An update on the progress. Ended up replacing an ignition coil with a factory one and that has fixed the hiccup so far. Not sure why. However, when I start the engine now anytime after the initial startup for the day, it takes some extra cranks to start and sometimes stumbles a second then runs just fine. Any suggestions? I just put some sea foam in the gas tank.
     
  5. Jun 24, 2012 at 4:33 PM
    #5
    jblo

    jblo New Member

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    Jun 24, 2012
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    #81265
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    Male
    Birmingham
    Vehicle:
    95 xcab
    I had a problem with my 1995 2.4L...over 18 months ago. Hic ups for a long time, changed out plugs, wires, coils..nothing help, then head gasket went. I used Blue Devil on & worked until now, now I am getting price to fix. Then I will need to fix hic ups, I have sure cure for humans but not cars. Did you say you changed O2 sensor yourself, (only one) , how hard was it.....???
     
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