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Thread: Engine dies when warming up.

  1. #1

    Default Engine dies when warming up.

    Hey everyone. I'm having trouble to solve. When I startup the car before it reaches 170°F, it will fire up, idle fine, then just dies no reason why. Once it gets to temperature, this stops happening far as I can tell anyways. Then once warmed up, it drives amazing with no issues I can tell, if I park it and it cools off below 170°F, it does the same thing as well. My setup is below:
    454 cid
    Sniper EFI
    MSD Digital 6AL
    Holley Dual Sync distributor with timing control.
    Brand new EFI tank, fuel pump and all new lines ran.
    Attaching datalog of the incident on it. There was three times it died sniper_0009.zip. Thanks for any help!

  2. #2
    Join Date
    Nov 2014
    Location
    Ont. Canada
    Posts
    836

    Default

    It looks like you have some EMI going on. This has been talked about before. Do some searches, or I'm sure Danny will post some links for you to read.

  3. #3
    Join Date
    Dec 2009
    Location
    Connecticut
    Posts
    18,688

    Default

    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

  4. #4

    Default

    I'll take a look & see. It's just weird it would be EMI just tell it gets to temp? This wasn't a problem tell I added this dual sync distributor.

    OK, so I tried the 1st thing, unhook the alternator and it no longer died. So what alternator do I buy that will stop this from happening? The below one?
    https://www.jegs.com/i/Powermaster/713/178601/10002/-1

  5. #5
    Join Date
    Dec 2009
    Location
    Connecticut
    Posts
    18,688

    Default

    Yes, the CS series alternator is the more modern type. Just curious, is this an old school alternator (Ford 1G, 2G/GM 10SI, 12SI, etc.), or a modern type alternator (Ford 3G, 4G/GM CS130, CS144, etc.)? Those old school alternators output a lot of electrical noise.
    https://forums.holley.com/showthread...1964#post61964 (Related Forum Post)
    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

  6. #6

    Default

    Buying now. I'll update if she stays running after the swap. Sadly, I just bought a brand new 180 amp alternator. LOL!

  7. #7
    Join Date
    Dec 2009
    Location
    Connecticut
    Posts
    18,688

    Default

    Again, which model alternator is currently on the engine?
    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

  8. #8

    Default

    This is the exact alternator I have on the car: https://www.jegs.com/i/Powermaster/7...7-344/10002/-1. It's the old school alternator. Next question is, should I get the 140 amp version or the 105 amp version? I had to upgrade from the old 90 amp alternator to the 150 amp one, cause when the A/C was on the car would crawl to its knees.

  9. #9
    Join Date
    Dec 2009
    Location
    Connecticut
    Posts
    18,688

    Default

    We don't know your electrical system amperage requirements, so get the 140 amp alternator.
    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

  10. #10

    Default

    Bought and paid for. I'll update if this fixes the issue (I'm sure it will), for anyone else with a similar issue. Also, I want to thank you for your quick response and helping me out in a time of need! Thank you!

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