small popping noise from exhaust And lag under hard acceleration - Mustang Evolution

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Old 11-30-2014, 09:45 AM   #1
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small popping noise from exhaust And lag under hard acceleration

Well i have a 02 manual mustang. And under hard acceleration i hear these hollow popping noises from the exhaust. Ive heard it could be timing, may need new plugs and wires, or vacuum leak, or fuel filter/pump. Anyone has this problem or fixed it. I just want to know where ib should start. Thanks
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Old 12-02-2014, 04:47 AM   #2
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Yuuuuuu hoooooooo...... Any one!?!?!? Lol 😕
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Old 12-02-2014, 06:34 AM   #3
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make the civic kids jealous with it before you fix it. Last i heard, they seem to want that sound, thinking its a good thing. but as far as i know, that sound is unburned fuel hitting your catalytic converter.


i suppose your going to tell me that you have an o/r pipe?
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2002 GT 5sp. 16x,xxx miles
Steeda Exhaust, C&L plenum, BBK Throttle Body, Steeda Underdrive, Steeda short throw, unknown stage clutch. Rear main leak. Compressor seal leak. Steeda lower control arms. good tires.
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Old 12-02-2014, 06:47 PM   #4
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Thars what i thought.... Any idea how to fix it?
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Old 12-02-2014, 06:55 PM   #5
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Hows your timing chain? Its possibly a sticking exaust valve. Being an 02 it wont be a camshaft synchronizer. Any other weird issues occurring? I wouldnt think its the crank sensor. If theres no performance issues, them im thinking stuck exaust valve. Id probably try seafoam in a vac line or something that will clean carbon out. Hopefully its just that. But id research a bit on exaust valves first, see if anything in their function gives you an idea. I dont know.if seafoam will break away carbon deposits any better than high rpm driving for a bit down the highway.

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2002 GT 5sp. 16x,xxx miles
Steeda Exhaust, C&L plenum, BBK Throttle Body, Steeda Underdrive, Steeda short throw, unknown stage clutch. Rear main leak. Compressor seal leak. Steeda lower control arms. good tires.
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Old 12-03-2014, 06:35 AM   #6
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To be honest i just did sea foam it and oil change. It was good then It started happening after i cleaned the maf sensor with the maf cleaner...
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Old 12-03-2014, 06:52 AM   #7
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Quote:
Originally Posted by mattyp511 View Post
To be honest i just did sea foam it and oil change. It was good then It started happening after i cleaned the maf sensor with the maf cleaner...
give it another cleaning. and make sure its bone dry before you start it up again. Theres a possibility that when cleaning it, it just moved some gunk from one spot and dried in another, causing a bad reading, and bad ratio. otherwise its also possible that its just a coincidence. But since you got it, id use the cleaner one more time to be sure. No black smoke, or extra black carbon debris out the tailpipe? (sign of running rich)
and most of all, no error codes saying that its running rich?
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2002 GT 5sp. 16x,xxx miles
Steeda Exhaust, C&L plenum, BBK Throttle Body, Steeda Underdrive, Steeda short throw, unknown stage clutch. Rear main leak. Compressor seal leak. Steeda lower control arms. good tires.
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Old 12-03-2014, 08:22 AM   #8
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No no smoke. Nothing But thanks for your help... Ill give it a shot asap and hope for the best. And no cel either... Never had one Before
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Old 12-03-2014, 08:31 AM   #9
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Ive heard marvel mystery oil works for getting rid of engine ticks and sticky lifters, but i dont know how well it will clean an exaust valve. Scotty Kilmer on youtube seems to believe that gumouts version of seafoam works better than outdated seafoam, but i'm pretty sure hes collecting checks from pennzoils and their parent company. For exaust valves, i would think a fuel additive, assuming it realy works, would help clean those out.

If you havent yet, then tune up. Id be surprised if you arent getting a full burn in all cylinders and not experiencing any power loss or poor performance.
if all else doesnt fix it, then maybe the seafoam already cleaned it up, and that removed the carbon deposits that were previously sealing the valve.

http://www.justanswer.com/ford/1dot7...u-exhaust.html

also found this.
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2002 GT 5sp. 16x,xxx miles
Steeda Exhaust, C&L plenum, BBK Throttle Body, Steeda Underdrive, Steeda short throw, unknown stage clutch. Rear main leak. Compressor seal leak. Steeda lower control arms. good tires.
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Old 12-03-2014, 10:39 PM   #10
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to tell you the truth whenever I was doing my Oil change I put in mobil 1 full synthetic high mileage and a half quart of the marvel mystery oil. Its its strong until the popping occurs when I can feel the lag hit so I'm going to go and check for vacuum leaks and also check out that article thank you very much I appreciate all your help
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Old 12-05-2014, 12:36 AM   #11
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If you use Sea Foam, you need to remove the back half of the exhaust including the cats as the cloud of crud can cause issues. My guess is that the cat is a bit gummed up now.
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Old 12-06-2014, 08:55 PM   #12
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Well i figured it out.... I had checked my spark b plugs when changing my oil and i never put to back on all the way so i put them completely on and wala. Then put marvel mystery oil in my gas and it started doing it again. So ran it out of gas and refilled it with 88 gas and problem solved again... So i dunno if it works in your gas tanks but not mine...
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