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Honda Accord idles does not acclerate

Discussion in 'Accord' started by CHIPMONK, Dec 16, 2011.

  1. CHIPMONK

    CHIPMONK New Member

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    Honda Accord 2.3 Engine is ULE Vtec, Did an engine swap. Replacement Engine idles smooth. When I step on accelerator it revs and dies immediately. If I hold the accelerator at any given place, example 2000 rpm the engine fluctuates wildly and then dies. All sensors and switches, wiring, distributor, fuel injection manifolds and plenum, egr valve and all other components which were working properly on the engine that was replaced have been reinstalled properly. The job was being done as if it was a long block replacement. I replaced the original engine because it was knocking and running only three cylinders. When the car came into the shop the car ran on three cylinders and could be driven down the road. Now with the replacement engine the car cannot be driven at all.
     
  2. AHHVTEC

    AHHVTEC Well-Known Member VIP

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    any check lights
     
  3. CHIPMONK

    CHIPMONK New Member

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    No check engine lights

    I wish I and a check light! Not a one. :confused:
     
  4. AHHVTEC

    AHHVTEC Well-Known Member VIP

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    i just had the same problem in my rsx, it would idle just fine but miss when reved it was a bad coil,
     
  5. 99sidude

    99sidude Moderator Moderator VIP

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    Moved. Keep tech stuff in the right place:)
     
  6. CHIPMONK

    CHIPMONK New Member

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    Changed out distributor still had the same problem. Both of the distributors, the one in the old engine and the one from the replacement engine have been tried and I still have the same problem. Grateful for any advice!!
     
  7. AHHVTEC

    AHHVTEC Well-Known Member VIP

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    check to make sure all your plugs are firing and make sure your running the correct ecu
     
  8. CHIPMONK

    CHIPMONK New Member

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    Accord does not acclerate

    How can I test the throttle position sensor? Also is there some why to check the solenoid that is connected to the fuel rail? Car idles great will not accelerate and has no codes or CEL.
     
  9. UNDR8D

    UNDR8D ...has a job!

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    Dude....there is a process to diagnostics...like anything, it should be approached with order and method. Stop swapping/throwing parts at it. You could play that game for weeks. It sounds to me like at some point in the swap, you have left something disconnected or perhaps as was mentioned, the ECU is wrong. What year is the car and what year car did the new motor come out of? You said when it came in to the shop? Is this where you work?
     
    Last edited: Dec 16, 2011
  10. CDelgado

    CDelgado New Member

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    I agree...process of elimination not replacement
     
  11. dashinghoopdi

    dashinghoopdi New Member

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    To clarify what I did was change out the long block! The long block came from an Accord EX that had a production date 6 months post the date of the Accord EX in which it was installed. The same engine family, F23A4, ULEVVTEC, Hollander interchange number of 80123C.
     
  12. UNDR8D

    UNDR8D ...has a job!

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  13. UNDR8D

    UNDR8D ...has a job!

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  14. CHIPMONK

    CHIPMONK New Member

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  15. CHIPMONK

    CHIPMONK New Member

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    I got the problem solved. The TPS and MAP sensor are very close together on the Throttle body and have identical plugs. I had these two plugs reversed. Car now runs great. It is not dude but dudette!
     
  16. UNDR8D

    UNDR8D ...has a job!

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    There you go. It kind of made sense that it was something simple. There is really no way anyone could have diagnosed that from afar..good job though dudette.
     
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