another quick question...

MI95Cobra

New Member

Aug 20, 2006

451

1

0

Oklahoma City

Aug 11, 2007

#1

• Aug 11, 2007

• #1

with the new heads, cam, and bigger throttle body whenever i'm driving down the street and my rpms are up it sounds like its cutting out or backfiring or something.....i don't loose power and i have it times at 14*......does that mean i need a bigger exhaust like maybe a 3" or does it mean i need a dyno-tune bad???
i currently have a 2-1/2" exhaust....

 

R

red95gtconvert

New Member

May 29, 2006

382

0

0

Ponca city, OK

Aug 11, 2007

#2

• Aug 11, 2007

• #2

Check for vacuum leaks, could be lean misfire.

 

rj95svt

Member

Jan 11, 2007

422

0

16

Hayden, AL

Aug 11, 2007

#3

• Aug 11, 2007

• #3

+1 look for a vacumm leak. It's not uncommon to have a vacumm leak after doing H/C/I work.

 

Dino Dino Bambino

15 Year Member

Jun 13, 2007

1,670

87

79

Cyprus

Aug 11, 2007

#4

• Aug 11, 2007

• #4

A vacuum leak usually causes a high idle so if your engine does idle high, look for a vacuum leak especially where the lower intake is bolted to the heads.
A 2.5" exhaust is more than big enough.

 

MI95Cobra

New Member

Aug 20, 2006

451

1

0

Oklahoma City

Aug 11, 2007

#5

• Aug 11, 2007

• #5

ok...thanks....i'll look...

 

final5-0

Mustang Master

Apr 6, 2003

6,817

12

79

DFW Texas

Aug 11, 2007

#6

• Aug 11, 2007

• #6

Jimmy

Good advice from all

Be sure to look at E V E R T H I N G you disturbed during that recent project

A L L hoses, electrical connections, bolts, etc, need to be just as delivered
from Ford :Word:

It only takes one or two of those little things to make your car a totally
disappointing experience every time you drive it

One last thing ...
you did run ALL lower intake bolts multiple times for correct tightness ... Right!

Grady

 

MI95Cobra

New Member

Aug 20, 2006

451

1

0

Oklahoma City

Aug 12, 2007

#7

• Aug 12, 2007

• #7

grady...yep i used my chilton manual and torqued them to the specifications the manual stated....i also got new grade 8 bolts for the lower intake, plus used arp head bolts....i'm gonna look all over my hoses again...it was 100* here and it made it really difficult to want to go look at my car today...maybe early in the morning....