First Time LSX swap review

Discussion in 'High Tech Retrofits' started by jb451, Aug 5, 2014.

  1. jb451

    jb451 Veteran Member

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    I live less than a 1/8th mile from where i work, so the car either barely gets driven or i don't rack up enough miles to tell city mpg…. However, i have taken a few mini road trips, and i regularly got 25-28 mpg. T56 and 3.42's work pretty well if i say so myself.
     
  2. jb451

    jb451 Veteran Member

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  3. sbca96

    sbca96 Veteran Member

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    Sounds good .. seems to make good power. Manual cars are fun, but I sure miss
    my 1993 Camaro Z28 LT1/4L60. It was so much fun to just throw into a slide or
    couple donuts or what ever. The 2004 GTO T56 is more of a handful, with shifts
    and slower steering .. more body roll .. etc.

    Get an IROC box and a rear sway bar .. its worth it. Shocks, springs .. etc. I did
    all those things on the LT1 swap and it pays off.

    Make sure you research bar sizes ... too big a bar in the rear is dangerous.

    Tom
     
  4. jb451

    jb451 Veteran Member

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    I was thinking of using one off of a T/A, i've got a bigger one up front from custom works. I don't think i'll need a huge bar anyways for a street car.
     
  5. hot72rod

    hot72rod Veteran Member Gold Member

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    You should go back to custom works and get a rear bar to match the front.
     
  6. sbca96

    sbca96 Veteran Member

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    +2

    If you already have an aftermarket bar, your best bet is to buy the matching one.

    Tom

     
  7. jb451

    jb451 Veteran Member

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    Problem Time!!!

    Yesterday the car was running like crap , it was bogging down on accel/decel and backfiring. Got it home and hooked the scanner to it, showing PO171&174, lean conditions on both banks, which to me, indicates a vacuum leak between the MAF and the intake before the individual cylinders. Used propane, water, and brake cleaner to see if i could find the leak, no dice.

    Only other thing i could think of is fuel pressure, but when it bogs down if i get the throttle in a certain spot, or try to stab the go pedal quickly, the car will run fine for 10-15 secs. Anyone know of something else i should check? Symptoms only show up after engine reaches operating temp, i would assume due to the 02 sensors being in closed (i think) loop. Fuel filter was also replaced not too long ago due to the original one i had collapsing in on itself. (see a few posts up)

    Thanks fellas.
     
  8. mickstan

    mickstan Veteran Member

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    Really good write up! I just sat down and read it all, start to finish. This gives me hope that I too would be able to pull this swap off. My 355 is a good engine, but it sure would be sweet to bring the car fully into the 21st century. Wish I could help with your current issue, but I'm a EFI dummy. I will however be watching to see what the issue turns out to be.
     
  9. camarolife78

    camarolife78 Veteran Member

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    For your running problem with the p0171 or P0174 its usually either fuel pressure, or dirty mass air flow meter
     
  10. sbca96

    sbca96 Veteran Member

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    Easy enough to check fuel pressure and write that one off. Arent these swaps a
    ton of fun? ;)

    Tom
     

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