low speed stumble issue! some help

M

mtlman22

Member

May 14, 2005

89

2

6

NY

Jul 19, 2006

#1

• Jul 19, 2006

• #1

i have a new engine i have just fin building and upon driving it i noticed to have a low speed stumble to it with a load. anyone have any ideas?

 

HISSIN50

"How long does it take to get help in here?

15 Year Member

Nov 29, 1999

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Jul 19, 2006

#2

• Jul 19, 2006

• #2

It might take just a little more info than that to elicit any thoughts that arent total guesses.

Good luck.

 

M

mtlman22

Member

May 14, 2005

89

2

6

NY

Jul 19, 2006

#3

• Jul 19, 2006

• #3

the car runs fine but when you are at an steady speed/Rpm and you step on it, it hesitates for about 3 sec's than goes away, it sometimes backfires

 

carbed87

Member

Jun 5, 2005

215

0

16

Jul 19, 2006

#4

• Jul 19, 2006

• #4

mabye a timing issue... is the spout connector in... im just throwing things out there.

 

jrichker

StangNet's favorite TOOL

In Remembrance. Thank you for your contributions

Mar 10, 2000

27,512

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Dublin GA

Jul 19, 2006

#5

• Jul 19, 2006

• #5

That's why it is a good idea to use the sig under the user control panel (User CP) option. It allows you to post your car year & mods, which help greatly when troubleshooting things. No, it is not there for us to snoop and see any "Secrets" you have hidden away under the hood. Be a good stangnetter and update you sig for future reference & don't keep us guessing.

 

HISSIN50

"How long does it take to get help in here?

15 Year Member

Nov 29, 1999

31,179

34

129

Jul 19, 2006

#6

• Jul 19, 2006

• #6

I meant like year and trim, mods, state of motor (stock, built, etc) and stuff like that. I dont even know if you are SD or MAF, have any emissions stuff deleted, etc.

The magic ball in my avatar doesnt really help.

EDIT: nevermind - JR beat me while I pecked on Derek's thread.

 

M

mtlman22

Member

May 14, 2005

89

2

6

NY

Jul 19, 2006

#7

• Jul 19, 2006

• #7

it is an built sportsman block with Z heads,Z cam. Efi with 255 pump and 30lb injectors at 46 psi running, Maf converted, base timming is at 12 degrees

 

M

mtlman22

Member

May 14, 2005

89

2

6

NY

Jul 19, 2006

#8

• Jul 19, 2006

• #8

The spout is plugged in

 

795.0pacecar

lover of pudgy polygamists

Jul 11, 2003

480

0

17

Senoia, GA

Jul 19, 2006

#9

• Jul 19, 2006

• #9

30lbs at 46 psi seems like it would be too much fuel IMO.

 

L

lxarlo

New Member

Nov 28, 2005

21

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Jul 19, 2006

#10

• Jul 19, 2006

• #10

try checking the tp sensor voltage. make sure it has a smooth continuously changing reading as you open and close the throttle.

 

M

mtlman22

Member

May 14, 2005

89

2

6

NY

Jul 20, 2006

#11

• Jul 20, 2006

• #11

i agree that it would have a little to much fuel with 30lbs injectors at 46psi, but i do notice the air fuel gauge leaning out when it happens

 

M

mtlman22

Member

May 14, 2005

89

2

6

NY

Jul 20, 2006

#12

• Jul 20, 2006

• #12

The TP sensor is brand new buts it worth a try

 

LEE93COBRA

New Member

Apr 12, 2000

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Alabama

Jul 20, 2006

#13

• Jul 20, 2006

• #13

What kind of MAF?

 

M

mtlman22

Member

May 14, 2005

89

2

6

NY

Jul 20, 2006

#14

• Jul 20, 2006

• #14

C&L

 

M

mtlman22

Member

May 14, 2005

89

2

6

NY

Jul 20, 2006

#15

• Jul 20, 2006

• #15

anyone have any other good ideas?

 

LEE93COBRA

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Apr 12, 2000

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Jul 20, 2006

#16

• Jul 20, 2006

• #16

Its the MAF.

Either get a new meter such as a Pro-M or whoever they are now

-or-

Find somebody to work with the EEC files and fix your MAF transfer curve so that it runs properly at 39 psi of fuel pressure

 

M

mtlman22

Member

May 14, 2005

89

2

6

NY

Jul 21, 2006

#17

• Jul 21, 2006

• #17

any ideas of who can tune an EEC processor?

 

LEE93COBRA

New Member

Apr 12, 2000

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Jul 21, 2006

#18

• Jul 21, 2006

• #18

mtlman22 said:

any ideas of who can tune an EEC processor?

Click to expand...

Do you not have any 'tuners' in your area?

 

M

mtlman22

Member

May 14, 2005

89

2

6

NY

Jul 21, 2006

#19

• Jul 21, 2006

• #19

not around this area. or do you know any places who stock pro-m meters?

 

M

mtlman22

Member

May 14, 2005

89

2

6

NY

Jul 22, 2006

#20

• Jul 22, 2006

• #20

?