Car runs horrible after 42# injectors and lightning maf install!

KenneBell

New Member

Apr 14, 2005

158

0

0

San Jose California

May 20, 2005

#1

• May 20, 2005

• #1

Car is supercharged and ran fine before the new injectors and MAF. I put in a 90mm lightning MAF and 42lb injectors, the car starts then idle fluctuates then dies, not only that I can not even gas the car too hard or it starts pinging! Do I need a tune or is something else wrong, also put in a new 70mm throttle body at the same time but I don't think that would cause any serious problems. Any help would be appreciated. Thanks

 

Venom351R

Founding Member

Apr 27, 2002

4,548

41

98

MAINE

May 20, 2005

#2

• May 20, 2005

• #2

I thought we could only run the Lighting 90 MAF if we had a chip burnt as well??

 

Don 95Vert

Founding Member

Oct 1, 1999

1,091

1

39

Delaware, OH

May 20, 2005

#3

• May 20, 2005

• #3

There is a lot of internet misinformation out there that says 90mm LMAFs are 'calibrated' for 42# injectors. This is totally false. All injector sizing is done in the EEC.

You absolutely need a chip for that combo - that is your problem.

 

94gts

Member

Jul 4, 2004

873

0

16

Carmel, New York

May 20, 2005

#4

• May 20, 2005

• #4

Don 95Vert said:

There is a lot of internet misinformation out there that says 90mm LMAFs are 'calibrated' for 42# injectors. This is totally false. All injector sizing is done in the EEC.

You absolutely need a chip for that combo - that is your problem.

Click to expand...

was just gonna say that

 

bjl95mustang

Founding Member

Jan 18, 2000

1,495

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36

Austin,TX

May 20, 2005

#5

• May 20, 2005

• #5

You have to get a chip or tweecer to use the L-maf. The maf tables in the ecc are different than the 94-95 maf tables.

 

O

One Wicked SVT

New Member

Nov 30, 2004

91

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0

May 20, 2005

#6

• May 20, 2005

• #6

LMAF need a tune...

Also you will definantly run out of meter at around 500hp... if your lucky and dont rev too high.

All the thing needs is 5volts, anything more and its pegged.

Goodluck.

PS: is this on a S/C'd/Boosted vehicle?

 

KenneBell

New Member

Apr 14, 2005

158

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0

San Jose California

May 20, 2005

#7

• May 20, 2005

• #7

Thanks for the input, I am going to get a dynotune on tuesday, how bad would it be to run the car with stock maf and 42# injectors?

 

Venom351R

Founding Member

Apr 27, 2002

4,548

41

98

MAINE

May 20, 2005

#8

• May 20, 2005

• #8

KenneBell said:

Thanks for the input, I am going to get a dynotune on tuesday, how bad would it be to run the car with stock maf and 42# injectors?

Click to expand...

bad b/c the stock MAF is calibrated for #19's