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Thread: Thoughts

  1. #11
    Join Date
    Nov 2014
    Location
    Ont. Canada
    Posts
    827

    Default

    If you change your cam sensor to Digital Falling, you will need to reset the cam sync unit position. You ignition would be 180° out if you didn't.

  2. #12
    Join Date
    Dec 2009
    Location
    Connecticut
    Posts
    18,642

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    Yes, that's what the first LINK in post #9 is for.
    May God's grace bless you in the Lord Jesus Christ.

    '78 BRONCO: 508" stroker, TFS heads, 11:1 comp ratio, Dominator MPFI & DIS, cold air induction, Spal dual 12" fans/aluminum radiator, dual 3" exhaust/Magnaflow mufflers, Moroso vacuum pump, Accusump, engine oil & trans fluid coolers, 100HP progressive dry direct-port NOS, A/C, LenTech Strip Terminator wide-ratio AOD/2500 RPM converter, 3:1 Atlas II, modified Dana 44/60-lockers-4.10s, hydroboost/4-disc brakes, ram-assist/heim joint steering, Cage long radius arms, traction bars, 4" Skyjacker lift, 35" mud tires

  3. #13

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    OK, why are we wanting to change this now? Car was always running fine the way it was setup initially. Is this something we're wanting to change separate from the main issues I'm having today?
    89 Mustang GT
    Dart Block 363 with Borg S475 Turbo
    Holley Dominator EFI with 7" Digital Dash

  4. #14
    Join Date
    Dec 2009
    Location
    Connecticut
    Posts
    18,642

    Default

    We just want to rule it out as a possibility. Digital Falling is a much cleaner & consistent signal. We've often addressed it on this forum.
    May God's grace bless you in the Lord Jesus Christ.

    '78 BRONCO: 508" stroker, TFS heads, 11:1 comp ratio, Dominator MPFI & DIS, cold air induction, Spal dual 12" fans/aluminum radiator, dual 3" exhaust/Magnaflow mufflers, Moroso vacuum pump, Accusump, engine oil & trans fluid coolers, 100HP progressive dry direct-port NOS, A/C, LenTech Strip Terminator wide-ratio AOD/2500 RPM converter, 3:1 Atlas II, modified Dana 44/60-lockers-4.10s, hydroboost/4-disc brakes, ram-assist/heim joint steering, Cage long radius arms, traction bars, 4" Skyjacker lift, 35" mud tires

  5. #15
    Join Date
    May 2014
    Location
    Bostwick, GA
    Posts
    134

    Default

    Quote Originally Posted by Joeyman View Post
    Car was always running fine the way it was setup initially.
    If that's the case, what exactly was changed? Put the "running fine" tune back in, and see?
    Injector Inspector
    USAF 1960-1964
    Drag racing since 1955

  6. #16

    Default

    I wish I knew, I've loaded in the original Global File (tune) dated Sept. 16, 2016 over & over.

    So update. Last night we did a compression test (spark plugs out) all 8 cylinders were 180 psi. We checked & adjusted the valves while the valve covers were off. Supposed to all be .008", but we found four that were .010", so we corrected that. Which in our opinion, isn't a huge deal that would cause my intermittent issues. We ran out of time, Saturday we're going to custom cut & fit a brand new set of MSD wires. This is a C.O.P. setup. Also last night, I installed eight new NGK spark plugs. Gap is .030" and they are -7s. I'm on low boost. No more than 9 psi on the street. If this does not fix my issues, I'm going to have to say there is something wrong in my Holley EFI harness. I will have to haul the car to a shop that specializes in wiring. I hate wiring!
    89 Mustang GT
    Dart Block 363 with Borg S475 Turbo
    Holley Dominator EFI with 7" Digital Dash

  7. #17
    Join Date
    Nov 2014
    Location
    Ont. Canada
    Posts
    827

    Default

    I don't know if this would cause your problems, but your Injector End Angle is set to 0°. My engine did not like this setting. I would get an off idle stumble I could not tune out, and I would get surging at cruise speeds. Post your global folder. It helps to see your setting instead of guessing.
    Last edited by 81 TransAm; 03-09-2018 at 09:44 AM.

  8. #18

    Default

    Over the weekend we spent several hours on the car. We did compression test on all 8 cylinders this past weekend, and all were 180 psi also adjusted the valves. This past Saturday we custom fitted a Brand New set of MSD wires put a 1000° silicon wrap on each wire, then shrink wrapped the ends. Installed new spark plugs as well. The biggest thing that we discovered (after doing all the other work) was that a .005" feeler gauge would not fit between the crank sensor and wheel. I removed the sensor and saw the damage that has been done. I attached a bunch of pictures, so you can see the damage. This may of been the mystery problem this entire time. Random misfire issues.



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    Last edited by Joeyman; 03-12-2018 at 09:01 AM.
    89 Mustang GT
    Dart Block 363 with Borg S475 Turbo
    Holley Dominator EFI with 7" Digital Dash

  9. #19

    Default

    Sensor doesn't look too bad. Are the plugs & plug wires the suppression type?

  10. #20

    Default

    Spark Plugs are NGK R5671A-7.
    Click image for larger version. 

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    89 Mustang GT
    Dart Block 363 with Borg S475 Turbo
    Holley Dominator EFI with 7" Digital Dash

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