leesvet leesvet is offline

Safety Car

About Me

  • About leesvet
    Occupation
    Semi retired field engineer
    Year & Model
    1987 Z-51 coupe
    Color
    Silver (this yr)
    Mods
    357, exhaust, intake/head porting, balanced, 52mm BBK, modified MAF & ducts, 26lb B-III FI, chipped,double row all alum rad,big-mouth,big exhaust, perf water pump, hand polished sawblades. Misc polished aluminum eng bay.
    Biography
    1st vette in 1987, owned 3 since that one. Have had a Corvette ever since then. Lived in S. Cal most of my career before sentenced to life in Tx.

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  • Last Activity: 04-05-2021 10:38 PM
  • Member Since: 04-04-2011

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  1. bryllant
    05-13-2014 09:41 AM
    I am so grateful for your response, We do have the FSM. My post was edited so I did not put someone to sleep, we have been reading the posts, and following those ideas to make some of the changes.
    I should take these issues one at a time and not bundle them into a huge tangle.

    Jay will do the PSI test when he is home from work.
    Next step after that, we are only getting code 1-2 from the computer.
    Once the car warms up there is a strong smell of gas.
    I will post a picture of my beautiful car later today!!
    Kate
  2. LoneStarV
    03-04-2013 03:00 PM
    What exhaust did you put on your car? Headers? Do you still have your air pump and cats?
  3. bolowbc
    04-03-2012 05:01 PM
    Hey thanks for your feedback in my harness bar thread! Definitely appreciated, and will save me some $ and grief.

    I was also a SoCal native, before I was sentenced to life (not really yet) in Virginia. Cheers!
  4. leesvet
    07-20-2011 07:50 PM
    yeah, it does.

    Let me explain how these thinsg work first..

    The TPI only has 2 fuel inj circuits. One for the left bank, one for the right. When #1 inj fires so does 3, 5 &7 all at the same time. Same on the other side. The rials supply them all by keeping a steady pressure on all the inj so as each one gets a signal, all it does is open for .001 of a second, spray that much fuel and then it closes. The pressure is always there and its constant. The system is pretty simple, really only 2 parts. If the inj are holding pressure, test by hooking up the gauge, key to ON, let the pressure build to 40 or whatever then key OFF and wait. It should hold 40+ lbs for the next hour or 2...3.
    Then over the next 6 hrs it should slowly drop to 20 ish and hang there all nite.
    Thats a good set of inj.
    BUT< if the regulator is bypassing fuel to the return, pressure will bleed off rapidly. That can appear to be the inj but its not.
    Pressurize the system and pull the vac line off the regulator and see if it has gas inside. IF there is ANY sign of fuel in the vac line, the regulator is junk. Buy a new adjustable regulator.

    If the vac line is dry, the fuel has to be leaking past the injectors into the engine at a fast rate. IF THEY ARE NOT..........

    One of the inj is shorted,. and what one does, that whole bank does...so it pours fuel in the cyl whenever the KEY is turned to ON.

    To check this, pressurize the system with key ON, crank briefly and STOP. Start pulling spark plugs looking for wet ones.
    In fact, the risk of "hydro'ing" a piston is pretty severe so I'd pull some plugs on both side next and see whats there. Do any further testing with the plugs OUT so there is no risk of hydro'ing.

    Like I say, if that vac hose is wet inside its the regulator for sure. If that hose is dry, there are shorted injectors and 2 gallons of fuel in the oil...thats bad.
  5. tonyole
    07-20-2011 07:34 PM
    You nailed what was going on. Not sure if you saw my follow up. Does that sound like the Pressure Regulator?

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