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Type: Posts; User: Kaweh

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  1. I replaced the EGR valve last week and still the...

    I replaced the EGR valve last week and still the same problem persists. It made no difference although we did find a tiny tiny leak with the EGR that was only found when spratying starter fulitd...
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    yes. when i climb a hill the exhaust manifolds...

    yes. when i climb a hill the exhaust manifolds start to glow within 30 seconds. we cup the tbi shut restricting air flow in and the glow goes away so it's been confirmed that I have
    a fuel delivery...
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    1992 454 TBI Fuel Pressure HELP

    Hello, on my 1992 454 motorhome, when i turn the key to on position the fuel pressure builds up to about 12 psi, I can hear the pump coming on then after two seconds roughly the pump turns off and...
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    Scan Tool Data Help

    Hello i recently went on a test drive with my motorhome while a snap on verus scan tool was attached. I was wondering if the O2 sensor is supposed to do this jumpy bit. Fast forward to 8:20 as the...
  5. Here is another short, more steady, video I did...

    Here is another short, more steady, video I did today. This is without driving, revving engine up to 2000 RPM and seeing what there is to see.
    ...
  6. the video is being updated on youtube to reduce...

    the video is being updated on youtube to reduce shakiness. I do have the .pids files that the snap on verus puts out. I couldn't find any software on the web to open them.
    it might be a proprietary...
  7. Finally, my youtube video uploaded. It took all...

    Finally, my youtube video uploaded. It took all night long. it's a little bit shaky but I did collect some data.


    https://www.youtube.com/watch?v=JIxMuPQy4so&feature=youtu.be


    I hope this...
  8. STANDARD MOTOR PRODUCTS Part # TJ11 {Click Info...

    STANDARD MOTOR PRODUCTS Part # TJ11 {Click Info Link for Alternate/OEM Part Numbers} Throttle Body Injector; 90.77 lbs/hr

    LINK: https://www.rockauto.com/catalog/moreinfo.php?pk=47657

    I just...
  9. The injectors are from RockAuto: STANDARD MOTOR...

    The injectors are from RockAuto:
    STANDARD MOTOR PRODUCTS Part # TJ11 {Click Info Link for Alternate/OEM Part Numbers} Throttle Body Injector; 90.77 lbs/hr
    ...
  10. by the way thanks for sharing this video Jay. I...

    by the way thanks for sharing this video Jay. I wonder what might happen if i take the manifolds off and run it. But on my rv there are a lot of power, oil and what not lines running right next to...
  11. Jay, i use 91 octane at the moment. I ordered a...

    Jay, i use 91 octane at the moment. I ordered a BAMS chip from Harris Performance. I just received it today and haven't put it in yet. I had the injectors tested and they were too low for this motor...
  12. The timing is correct and I tried it at 4 degrees...

    The timing is correct and I tried it at 4 degrees TDC, 6 and 12. We also did it by ear once. When it started to knock we backed off a bit. And that's where it's at right
    now, 12 degrees. Great...
  13. it's no the catalytic converter. I ran it for a...

    it's no the catalytic converter. I ran it for a month without the catalytic converter in it. IT is NOT the Cat.
  14. Thanks for your thoughts! I put brand new exhaust...

    Thanks for your thoughts! I put brand new exhaust manifolds on as part of my rebuild!!
  15. if you're late to this post: I put in a new...

    if you're late to this post: I put in a new catalytic converter and rebuilt the engine. Today I put in the acdelco EP381 pump. This is a higher output pump and my gauge finally went up to 12psi for...
  16. I ordered new fuel injectors 90lbph, it fired...

    I ordered new fuel injectors 90lbph, it fired right up. good power. floor it a couple of times and the manifolds got hot red again. I didn't even have to go on the hill to test it. Now I feel really...
  17. I found this tonight on IRV site: "454s do...

    I found this tonight on IRV site:

    "454s do have exhaust manifold issues from excessive heat. My last 454 went through 7 manifolds prior to changing the engine T stat to a 160. After that never had...
  18. GM Adjustable Fuel Pressure Regulator

    I came across this gadget a long time ago and was thinking about modifying the current set up.

    http://marine-performance-parts.com/cfmtechadjustabefuelpsiregulatorforgmtbi2843505774.aspx

    Does...
  19. Thanks Tom for all that info. And so, here are a...

    Thanks Tom for all that info. And so, here are a couple of questions. Does anyone know where to obtain the injectors that will be right. I ask because the ones in now say the right part but
    don't...
  20. What is EGT and A/F? I use AC Delco when...

    What is EGT and A/F?
    I use AC Delco when possible and available. I've done pretty much all of the labor myself and I have owned this vehicle for the past six years.
  21. The flow test was done at 13psi. Just found that...

    The flow test was done at 13psi. Just found that out. I just wonder if the injectors are indeed the problem. And why did I have no problem all of last year?
    How can I bump up the pressure of the...
  22. Hello and thank you for your comment. The book...

    Hello and thank you for your comment. The book says 4 degrees TDC and I have played with the timing several times. Timing is not the issue in this case! And last year, before all this, the engine was...
  23. Thank you for your reply. We had already tested...

    Thank you for your reply. We had already tested the EGR valve and because you brought it up I just tested it again (20 seconds hold) and it holds vacuum.
  24. Glowing Exhaust Manifolds 1992 454 TBI 7.4L P30 Motorhome

    Hello, after reading a lot here i decided to join and ask my question with hope that some of you grearheads may have an answer. I drive a 1992 p30 chassis motorhome with a 7.4L 454 tbi in it. A while...
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