Intake poping

LordMustangGT

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Jan 9, 2006

118

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17

Port Orchard, WA

Apr 3, 2007

#1

• Apr 3, 2007

• #1

after doing a E-303 cam swap on my friends car it does this intake poping at low RPM, but once you get on it it goes away and still has great power. any sugestions?

Matt

 

04MystiCobra

New Member

Jan 29, 2004

12

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0

Corpus Christi, TX.

Apr 3, 2007

#2

• Apr 3, 2007

• #2

Is the upper intake getting hot?

 

LordMustangGT

Member

Jan 9, 2006

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Port Orchard, WA

Apr 3, 2007

#3

• Apr 3, 2007

• #3

not any hotter than normal I wouldn't think, but I'll dubble check,

 

Scooby5.0Doo

That's the fastest $400 car out there

Jan 9, 2003

833

0

0

beaverton

Apr 3, 2007

#4

• Apr 3, 2007

• #4

sounds kinda like intake backfireing. maybe the timing is to retarded or is that advanced i can never remeber which one. when you guys installed the cam did you degree it or just put the cam timing at 0

 

2004mysticobra

New Member

Nov 25, 2005

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Lacey, WA

Apr 3, 2007

#5

• Apr 3, 2007

• #5

Sounds like lean opos but you're not running a blower.
If you feel that your intake is hot,moreso than normal, you may have a valve thats not seating all the way. May need shims for the rockers. Easy check if so.
Your timing is good right? If you're way out of timing your car will act like this as well.

 

fiveohwblow

Official Member

15 Year Member

Jul 21, 2005

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Apr 3, 2007

#6

• Apr 3, 2007

• #6

Did you use the stock cam gears and sprockets? also, what did you do for lining them up (as far as the notches go..)

 

WANNA_BE_GT

Founding Member

Aug 5, 2000

1,019

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38

Seattle WA USA

Apr 3, 2007

#7

• Apr 3, 2007

• #7

Sounds like a timing issue to me.

 

LordMustangGT

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Jan 9, 2006

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Port Orchard, WA

Apr 4, 2007

#8

• Apr 4, 2007

• #8

It has brand new timming set. Nothing specail when installing, just lined up the two dots. Timming is only at 12deg. I'll dubble check that too. It made this hug backfire out the exhuast once trying to start it back up the first time, don't think it harm'd anything though. Sounded like a M100 going off. It was enough to losen the cat-back off a little. The only thing i could think was, some of the injectors got droped and had to use 3 used ones I had laying around. There white top, so I'm thinking there not the same lbs. They came out of a 86 5.0 non-HO t-bird. We're gonna buy a new set aways, that may be the problem right there.

 

WANNA_BE_GT

Founding Member

Aug 5, 2000

1,019

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38

Seattle WA USA

Apr 4, 2007

#9

• Apr 4, 2007

• #9

I think the 85 non H.O. tbird used either 14lb or 17lb injectors. Not enough fuel definitely would cause issues and could be causing the computer to freak out... Sounds like quite the kanundrum you have....

 

fiveohwblow

Official Member

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Jul 21, 2005

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Apr 4, 2007

#10

• Apr 4, 2007

• #10

WANNA_BE_GT said:

I think the 85 non H.O. tbird used either 14lb or 17lb injectors. Not enough fuel definitely would cause issues and could be causing the computer to freak out... Sounds like quite the kanundrum you have....

Click to expand...

agreed. +1

 

Gearbanger 101

Straight Outta Locash

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Aug 10, 2002

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Apr 4, 2007

#11

• Apr 4, 2007

• #11

Moved to Tech.