HCI swap weak, hesitates and stumbles under hard accleration

Discussion in '94-95 5.0 - Specific' started by Kylebach14, Apr 16, 2014.

  1. Kylebach14

    Kylebach14 New Member

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    Just did a HCI swap and when I mash it, it stumbles, hesistates and doesn;t have any balls until around 3000 then it throws you in the back of your seat. It cant even break them lose when it's wet. Any ideas what this could possibly be? Vacuum leak?

    94 5.0
    TFS 1 cam
    1.6 roller rockers
    6.500 pushrods
    Vic Jr. Heads
    Typhoon U/L intake
    Walbro 255 fuel pump
    Stock injectors, MAF, TB
    AODE with shift kit
     
  2. SLOW95GTS

    SLOW95GTS Active Member

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    You put victor jr.'s on a 302? wow. first you'll need atleast 24lb. injectors, with a MAF calibrated for the injectors, a 255lph fuel pump, and most likely a tune, unfortunately. Is the motor stroked or piston change for that 2.05 intake valve?
     
  3. rz5.0

    rz5.0 Legend

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    Those head are huge. You are not going to get anything on the low end. . Also did you measure you ptv.. bet you prob touching your piston. I did with same cam and afrs. Not enough to bend but you could see the marks on the pistons..

    Enviado usando mi SHP-L710 usando TapaTalk
     
  4. tykempster

    tykempster Member

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    Did you check the plugs and wires at night with no lights and make sure they aren't arcing anywhere? i've had a plug wire burn and a plug crack since my HCI, both were annoying and took 5 minutes to fix
     
  5. RichV

    RichV Well-Known Member

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    Definitely check for a vac leak. Any codes? GT ECU/injectors?
     
  6. Musturd

    Musturd Legend

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    Those heads are huge for a 302 I've only really seen them work we'll on boosted 302's and it's still chancey
     
  7. shoua50

    shoua50 New Member

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    too much airflow not enough fuel