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Thread: Exhaust pops under acceleration.

  1. #31

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    Three pages, so I might have missed it, but what do the plugs look like? I get some "pops" in the exhaust when my plugs are fouled.
    '95 Lightning,351W,10.26/134,4280lbs

  2. #32
    Join Date
    Dec 2009
    Location
    Connecticut
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    22,959

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    Spark plug info in posts #7, #24 & #29.
    May God's grace bless you in the Lord Jesus Christ.
    '92 Ford Mustang GT: 385" SBF, Dart SHP 8.2 block, TFS TW 11R 205 heads, 11.8:1 comp, TFS R-Series intake, Dominator MPFI & DIS, 36-1 crank trigger/1x cam sync, 160A 3G alternator, Optima Red battery, A/C, 100HP progressive dry direct-port NOS, Spal dual 12" fans/3-core Frostbite aluminum radiator, Pypes dual 2.5" exhaust/off-road X-pipe/shorty headers, S&W subframe connectors, LenTech Strip Terminator wide-ratio AOD/2800 RPM converter, M4602G aluminum driveshaft, FRPP 3.31 gears, Cobra Trac-Lok differential, Moser 31 spline axles, '04 Cobra 4-disc brakes, '93 Cobra booster & M/C, 5-lug Bullitt wheels & 245/45R17 tires.

  3. #33

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    Plugs all look consistent, and I replaced them along with the wires to try and rule them out. No change.

    Yesterday I tried another set of mufflers, same thing. I bought a new laptop, I may try the newest Build 130 of V5. Maybe I have a partially clogged injector?

  4. #34
    Join Date
    Nov 2014
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    Ont. Canada
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    Quote Originally Posted by another69 View Post
    Plugs all look consistent, and I replaced them along with the wires to try and rule them out.
    Just because the plugs are new does not mean they are good. I'll never use ACDelco spark plugs again. I had a popping in the exhaust that I was chasing for two years until I changed to different spark plugs.

  5. #35

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    What did you change to? This is my second set of iridium ACDelco plugs.

  6. #36
    Join Date
    Nov 2014
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    Ont. Canada
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    I changed to NGK.

  7. #37
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    Jan 2010
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    Brisbane, Australia
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    Quote Originally Posted by 81 TransAm View Post
    Just because the plugs are new does not mean they are good. I'll never use ACDelco spark plugs again. I had a popping in the exhaust that I was chasing for two years until I changed to different spark plugs.
    Near same hear. Haven't used AC since the 80s. NGK for me. Gary
    Regards, Gary

  8. #38

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    I have some cellphone & GoPro videos of the noise. I'll try and find a way to post it here.

  9. #39
    Join Date
    Jan 2010
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    Brisbane, Australia
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    Yes, that will be good if you can do that. Gary
    Last edited by Gaz64; 10-22-2019 at 05:20 PM.
    Regards, Gary

  10. #40

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    Have you tried Danny's suggestion to run it in Open Loop?
    '95 Lightning,351W,10.26/134,4280lbs

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