Popping through the intake

shurb125 · July 16th, 2008, 04:39 PM

What would cause this to happen? I crank the car up and back down the driveway (downhill) and then have to go up hill, give it some gas and it's ok come to a stop sign, stop and give it gas and get into the main road and stay in the gas and it sounds like it coming from the intake area. After it warms up it dosen't happen any more. Any suggestions, thanks for your help in advance.

shurb125 · July 16th, 2008, 09:42 PM

Come on, I'm not new to the forum and nobody on this forum has any idea? That's hard to believe with all the people building bigger better new engines!!!

shurb125 · July 17th, 2008, 04:24 PM

I really need you guys help, I know someone here has an answer.

Hunt_chevs · July 17th, 2008, 05:30 PM

the only popping i have ever seen related to the intake was from improper timing,. i believe too advanced but im not positive

MamaStang · July 17th, 2008, 06:02 PM

Is it a popping noise like pop corn popping or what exactly does it sound like?

I think maybe folks aren't responding because they may not quite understand your problem??

<--- too dumb to offer a solution to your problem - I would have made an appt by now.

Sorry!

chargedmustang · July 17th, 2008, 10:42 PM

I agree what doe it sound like?

chargedmustang · July 17th, 2008, 10:42 PM

Sorry does

hopper · July 18th, 2008, 09:23 AM

i have been through this, after countless hours trying to isolate the electrical problem, i realized something must be fucked for it to backfire through the intake. something mechanically. Hopefully this isn't your problem, but pull the valve covers and make sure all the valves are opening and closeing, my cam was rounded right to a fine circle with no lobe left on here. this will cause the pressure to build and expell through your intake valve.
good luck

78mach1 · July 18th, 2008, 02:57 PM

mine does the same exact thing, it sounds alot like its to lean, the second it warms up its ok, id also like some help on this one

Hunt_chevs · July 18th, 2008, 02:59 PM

Originally Posted by Hunt_chevs

the only popping i have ever seen related to the intake was from improper timing,. i believe too advanced but im not positive

whats your timing at?

shurb125 · July 18th, 2008, 04:12 PM

Originally Posted by chargedmustang

I agree what doe it sound like?

It sounds almost like a back fire but I know it's coming from under the hood.

shurb125 · July 18th, 2008, 04:13 PM

Originally Posted by Hunt_chevs

whats your timing at?

Timing is set at 14* advanced.

By the way thanks for all you guys help.

shurb125 · July 18th, 2008, 05:18 PM

Well I just took it out and it only makes on poping sound, and it may not be from the intake, but I know it's from under the hood area. No popcorn sounds, just a slight hesetation during acceleration from first to second gear and then one pop noise and that's it.

GoodOleBoyzRacin · July 18th, 2008, 07:50 PM

Originally Posted by hopper

i have been through this, after countless hours trying to isolate the electrical problem, i realized something must be fucked for it to backfire through the intake. something mechanically. Hopefully this isn't your problem, but pull the valve covers and make sure all the valves are opening and closeing, my cam was rounded right to a fine circle with no lobe left on here. this will cause the pressure to build and expell through your intake valve.
good luck

he said it doesnt do it after it warms up.

mines has the same prob. my timing is also set at 14* but thats not it because i know on 93 octane it will take 15 or 16. if its the same prob im thinkin bout, the car kind of "bucks" and it starts doin it around like 1/4 throttle?

shurb125 · July 20th, 2008, 01:03 PM

Originally Posted by GoodOleBoyzRacin

he said it doesnt do it after it warms up.

mines has the same prob. my timing is also set at 14* but thats not it because i know on 93 octane it will take 15 or 16. if its the same prob im thinkin bout, the car kind of "bucks" and it starts doin it around like 1/4 throttle?

That sounds like my car!

JBIGBOOTSY · July 20th, 2008, 06:25 PM

The problem of the poping is most likely from from pre ignition.

jrh_1980 · July 20th, 2008, 06:49 PM

had the same trouble. I switched to a gt 40 intake and forgot to hook up the air charge temp sensor. hooked it up and it worked.

GoodOleBoyzRacin · July 20th, 2008, 09:11 PM

i havent really worried about it cause im switching to carb soon, but i would get a meter and check the volts to all the sensors on top of the motor. but the backfiring out of the intake could be a rich condition.......and if its the air temp sensor it could be reading 0* temps and adding more fuel which would cause it to backfire, likely out of the intake, and also shity gas mileage

78mach1 · July 24th, 2008, 02:18 AM

alright so i went into this a little more because i also wanted to figure it out, i couldnt understand why it only did it when first start up, its not something i really worried about, but i remember reading an artical on this very thing, this can accure on a high mileage engine, what happens is the upper and lower plenum build up a thin layer of carbon on the inside of the intake, so at first start up the carbon is almost kind of soaking up some of the fuel vapor, so there for your getting a lean mixture which causes that popping, i wasnt sure so i talked to a guy i work with and he said he has ran into this before. its nothing to worry about, and if your planning on changing over the intake it shouldnt matter

July 16th, 2008, 04:39 PM	#1
shurb125 Regular 1993 Mustang LX Vert Join Date: Nov 2006 Location: South Carolina Posts: 437 iTrader: 0 reviews	Popping through the intake What would cause this to happen? I crank the car up and back down the driveway (downhill) and then have to go up hill, give it some gas and it's ok come to a stop sign, stop and give it gas and get into the main road and stay in the gas and it sounds like it coming from the intake area. After it warms up it dosen't happen any more. Any suggestions, thanks for your help in advance. __________________ 306 TFS heads stage 3 port & polished, TFS stage 2 cam, TFS Track heat intake, DSS pistons, 24# injectors, 76mm MAF, 70mm BBK/Edelbrock TB and spacer

July 16th, 2008, 09:42 PM	#2
shurb125 Regular 1993 Mustang LX Vert Join Date: Nov 2006 Location: South Carolina Posts: 437 iTrader: 0 reviews	Come on, I'm not new to the forum and nobody on this forum has any idea? That's hard to believe with all the people building bigger better new engines!!! __________________ 306 TFS heads stage 3 port & polished, TFS stage 2 cam, TFS Track heat intake, DSS pistons, 24# injectors, 76mm MAF, 70mm BBK/Edelbrock TB and spacer

July 17th, 2008, 04:24 PM	#3
shurb125 Regular 1993 Mustang LX Vert Join Date: Nov 2006 Location: South Carolina Posts: 437 iTrader: 0 reviews	I really need you guys help, I know someone here has an answer. __________________ 306 TFS heads stage 3 port & polished, TFS stage 2 cam, TFS Track heat intake, DSS pistons, 24# injectors, 76mm MAF, 70mm BBK/Edelbrock TB and spacer

July 17th, 2008, 06:02 PM	#5
MamaStang Top Down, Crunked Up 2005 Mustang GT Fast Enough for this old broad Join Date: Feb 2008 Location: Indiana Posts: 8,532 Blog Entries: 2 iTrader: 0 reviews	Is it a popping noise like pop corn popping or what exactly does it sound like? I think maybe folks aren't responding because they may not quite understand your problem?? <--- too dumb to offer a solution to your problem - I would have made an appt by now. Sorry! __________________ Bassani & Topless Vert Crew Member #4 Let Me Help You Shop For The Ladies In Your Lives This Year! Click Here For Info

July 17th, 2008, 10:42 PM	#6
chargedmustang Newbie 1991 Mustang GT Cobra Join Date: Jul 2008 Location: Victoria B.C Canada Posts: 16 iTrader: 0 reviews	I agree what doe it sound like? __________________ 1991 Mustang GT Cobra Paxton Supercharged

July 17th, 2008, 05:30 PM	#4
Hunt_chevs Hardcore Enthusiast 2002 Gt Not Slow Join Date: Aug 2007 Location: SJ-CA, 50-ft elev. Posts: 1,649 iTrader: 1 reviews	the only popping i have ever seen related to the intake was from improper timing,. i believe too advanced but im not positive

July 17th, 2008, 10:42 PM	#7
chargedmustang Newbie 1991 Mustang GT Cobra Join Date: Jul 2008 Location: Victoria B.C Canada Posts: 16 iTrader: 0 reviews	Sorry does __________________ 1991 Mustang GT Cobra Paxton Supercharged

July 18th, 2008, 09:23 AM	#8
hopper Regular Join Date: Apr 2007 Posts: 390 iTrader: 0 reviews	i have been through this, after countless hours trying to isolate the electrical problem, i realized something must be fucked for it to backfire through the intake. something mechanically. Hopefully this isn't your problem, but pull the valve covers and make sure all the valves are opening and closeing, my cam was rounded right to a fine circle with no lobe left on here. this will cause the pressure to build and expell through your intake valve. good luck

July 18th, 2008, 02:57 PM	#9
78mach1 Hardcore Enthusiast Join Date: Oct 2007 Location: utah Posts: 1,365 iTrader: 0 reviews	mine does the same exact thing, it sounds alot like its to lean, the second it warms up its ok, id also like some help on this one

July 18th, 2008, 05:18 PM	#13
shurb125 Regular 1993 Mustang LX Vert Join Date: Nov 2006 Location: South Carolina Posts: 437 iTrader: 0 reviews	Well I just took it out and it only makes on poping sound, and it may not be from the intake, but I know it's from under the hood area. No popcorn sounds, just a slight hesetation during acceleration from first to second gear and then one pop noise and that's it. __________________ 306 TFS heads stage 3 port & polished, TFS stage 2 cam, TFS Track heat intake, DSS pistons, 24# injectors, 76mm MAF, 70mm BBK/Edelbrock TB and spacer

July 20th, 2008, 06:25 PM	#16
JBIGBOOTSY MM Fanatic 1990 LX hatch Join Date: Aug 2006 Location: Hobart Indiana Posts: 4,391 iTrader: 0 reviews	The problem of the poping is most likely from from pre ignition.

July 20th, 2008, 06:49 PM	#17
jrh_1980 Regular 89 Mustang LX 7.90@90mph 8th Join Date: Feb 2008 Location: Macomb, Illinois Posts: 151 iTrader: 1 reviews	had the same trouble. I switched to a gt 40 intake and forgot to hook up the air charge temp sensor. hooked it up and it worked.

July 20th, 2008, 09:11 PM	#18
GoodOleBoyzRacin Regular 1990 Mustang GT 13.64 @ 101 MPH Join Date: Jul 2008 Location: Memphis, TN Posts: 324 iTrader: 0 reviews	i havent really worried about it cause im switching to carb soon, but i would get a meter and check the volts to all the sensors on top of the motor. but the backfiring out of the intake could be a rich condition.......and if its the air temp sensor it could be reading 0* temps and adding more fuel which would cause it to backfire, likely out of the intake, and also shity gas mileage __________________ 90 Ford Mustang 5.0 T5- BROKE 1.9 60' on street tires13.64 @ 101 MPH 89 Ford Mustang coupe- http://www.youtube.com/watch?v=1nIrzcQz3_8

July 24th, 2008, 02:18 AM	#19
78mach1 Hardcore Enthusiast Join Date: Oct 2007 Location: utah Posts: 1,365 iTrader: 0 reviews	alright so i went into this a little more because i also wanted to figure it out, i couldnt understand why it only did it when first start up, its not something i really worried about, but i remember reading an artical on this very thing, this can accure on a high mileage engine, what happens is the upper and lower plenum build up a thin layer of carbon on the inside of the intake, so at first start up the carbon is almost kind of soaking up some of the fuel vapor, so there for your getting a lean mixture which causes that popping, i wasnt sure so i talked to a guy i work with and he said he has ran into this before. its nothing to worry about, and if your planning on changing over the intake it shouldnt matter

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