weird noise!!!

bossman69 · June 2nd, 2008, 09:38 PM

Got it runnin and it sounds good except for one thing. Ive got this popping noise while its running.It was doing it alot while I was adjusting my carb and I thought I got it all right but every once in a while it popsw and I know for sure its not bad plugs or wires.It might be my distributer out of time or my be its the air/fuel mixture.Dont know but if I cant figure it out Im goint to change my dame intake and carb to a 4-barrel. I need a tach so I can set my idel and going to change my points to electric points by IGNITOR so I dont have to adjust it any more.

any Idea what it might be?The sounds coming from the end of headers.

Katen · June 3rd, 2008, 12:12 AM

just an idea maybe your valves arent sealing right. only think i can think of

supermachone · June 3rd, 2008, 03:14 AM

you sure its not backfiring through the carb itself?

blue90lx · June 3rd, 2008, 04:22 AM

Is it open headers? If so are they long tubes or shorty headers?

Stangman558 · June 3rd, 2008, 04:39 AM

Hey Bossman,

My bet on that popping noise is that you will find you have a header leak. I check my header bolts (to the block) a few times a year because they have a tendency to loosen up....no matter how tight you think you got them.

The other spot is at the collectors. A leak at either collector will produce a popping sound...and the type of popping is just a matter of how big the leak is. Unless you spend a few extra bones on the good collector gaskets, they get brittle after awhile and a good bump or scrape on a speedbump and they break at one spot or another.

Just my two cents. Would like to know what you end up finding.

bossman69 · June 3rd, 2008, 03:55 PM

Well tha car has been sitting for 5 years and Im pretty sure the gaskets are brittle but it would be makeing the noise all tha time.They are long tube headers. and when it pops it sounds like it echos through the muffler and its on the passenger side only.may be the valves are sticking and maybe it has build up from the old oil.I might take some SEA FOAM and run it through the motor first.Ill keep yall informed on what it is.

460brevill · June 3rd, 2008, 04:29 PM

put half quart of atf in your oil.run it at about 2500 rpm for 20 minuts. see if it stops the noise.

bossman69 · June 4th, 2008, 01:14 AM

Ill try it tomarrow but until then stay tuned

June 2nd, 2008, 09:38 PM	#1
bossman69 Regular 1969 Mustang N/A Join Date: Dec 2007 Location: Dallas Posts: 60	weird noise!!! Got it runnin and it sounds good except for one thing. Ive got this popping noise while its running.It was doing it alot while I was adjusting my carb and I thought I got it all right but every once in a while it popsw and I know for sure its not bad plugs or wires.It might be my distributer out of time or my be its the air/fuel mixture.Dont know but if I cant figure it out Im goint to change my dame intake and carb to a 4-barrel. I need a tach so I can set my idel and going to change my points to electric points by IGNITOR so I dont have to adjust it any more.any Idea what it might be?The sounds coming from the end of headers.

June 3rd, 2008, 03:14 AM	#3
supermachone Enthusiast 2004 GT & 1972 Mach 1 Kessel Run @ Less Than 12 Parsecs Join Date: Sep 2007 Location: Kansas Posts: 796	you sure its not backfiring through the carb itself? __________________ 2004 Screamin Yellow Mustang GT 1972 Yellow Mustang Mach 1

June 3rd, 2008, 04:22 AM	#4
blue90lx Regular 90 lx hatch 13.02@103.62 Join Date: Mar 2008 Location: Albertville, Alabama Posts: 123	Is it open headers? If so are they long tubes or shorty headers? __________________ to many parts and money to be so slow F/S 1986 mustang vert asking $6500 http://www.moddedmustangs.com/forums...ml#post1277818

June 3rd, 2008, 04:39 AM	#5
Stangman558 Newbie 67 FB GT Join Date: Jun 2008 Posts: 2	That popping noise Hey Bossman, My bet on that popping noise is that you will find you have a header leak. I check my header bolts (to the block) a few times a year because they have a tendency to loosen up....no matter how tight you think you got them. The other spot is at the collectors. A leak at either collector will produce a popping sound...and the type of popping is just a matter of how big the leak is. Unless you spend a few extra bones on the good collector gaskets, they get brittle after awhile and a good bump or scrape on a speedbump and they break at one spot or another. Just my two cents. Would like to know what you end up finding.

June 3rd, 2008, 04:29 PM	#7
460brevill Enthusiast Join Date: Apr 2007 Location: Farmville VA Posts: 877	put half quart of atf in your oil.run it at about 2500 rpm for 20 minuts. see if it stops the noise. __________________ i sixing 200 six with 300 hp.

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June 3rd, 2008, 12:12 AM	#2
Katen Regular 1973 Coupe Mustang pft if i know Join Date: Jan 2007 Location: Defiance, Ohio Posts: 110	just an idea maybe your valves arent sealing right. only think i can think of

June 3rd, 2008, 03:55 PM	#6
bossman69 Regular 1969 Mustang N/A Join Date: Dec 2007 Location: Dallas Posts: 60	Well tha car has been sitting for 5 years and Im pretty sure the gaskets are brittle but it would be makeing the noise all tha time.They are long tube headers. and when it pops it sounds like it echos through the muffler and its on the passenger side only.may be the valves are sticking and maybe it has build up from the old oil.I might take some SEA FOAM and run it through the motor first.Ill keep yall informed on what it is.

June 4th, 2008, 01:14 AM	#8
bossman69 Regular 1969 Mustang N/A Join Date: Dec 2007 Location: Dallas Posts: 60	Ill try it tomarrow but until then stay tuned

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weird noise!!!

weird noise!!!

That popping noise