Tune On Maf Converted Stang

8

88vertgeetee

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May 8, 2013

#1

• May 8, 2013

• #1

Hi wondering if I can get my 87 converted to maf. It's got trick flow hci and an a9p. What should I do about a tune

 

jrichker

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#2

• May 8, 2013

• #2

Get some 24 LB injectors, a Pro-M 75 mm MAF to match the injectors, a 65 MM throttle body and a 155 LPH fuel pump. That will eat up most of your tune money, but the computer is very capable of taking care of what needs to be done without a custom dyno tune.

 

ratio411

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May 8, 2013

#3

• May 8, 2013

• #3

You are already running an A9P ECM?
Or that is what you have for the conversion?
If you already have that ECM, then the pigtail harness and MAF should be all you need to convert.
Like jrichker said, if you have the correct MAF for the injectors you want to use, you should be fine, at least until such time as you want a tune in order to squeeze every last bit out of it.

What tranny?



...

 

8

88vertgeetee

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#4

• May 8, 2013

• #4

Yes I already have all that stuff jrichker. It's got the a9p and the maf conversion installed. It was all just built but had a stock 110 fuel pump that just went after the hci install. I'm getting a 190 fuel pump and fuel pressure regulator this Friday. So after the new fuel pump is in the computer should be able to handle most of the tuning on its own then? And it's got a t5.

 

88LX5.Oh

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May 8, 2013

#5

• May 8, 2013

• #5

So you have the auto computer and a manual trans?
I could have swore I read somewhere that doing this messed up something with the 02 harnesses.
And to your last question, it'll be able to handle the mods you have. There's been people that have had more radical set ups and use the factory computer. While it's not 100% perfect, it'll be good enough for street duty

 

8

88vertgeetee

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May 8, 2013

#6

• May 8, 2013

• #6

Should I just get an a9l

 

306N/A

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#7

• May 9, 2013

• #7

ya

 

8

88vertgeetee

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May 9, 2013

#8

• May 9, 2013

• #8

Has anyone run the a9p with no problems?

 

jrichker

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#9

• May 10, 2013

• #9

88vertgeetee said:

Has anyone run the a9p with no problems?

Click to expand...

I have, it does work, and I did not notice any problems.

888LX5.Oh said:

So you have the auto computer and a manual trans?
I could have swore I read somewhere that doing this messed up something with the 02 harnesses.

Click to expand...

The computers will interchange OK, the O2 wiring sensor harnesses won't.
Here's why...

O2 Sensor harness interchange and modification

Originally Posted by 302EFI

Revised 16-Oct-2011 to add O2 sensor harness warnings
The wires for the 02's and low oil did not change throughout the years, they are all in the same place.
The main ones you need to worry about are (on the harness end (ECU) that plugs into the 02 plug) is:
\- 1. Lightblue / yellow
- 2. White / Purple
- 3. Purple / Yellow
The White/Purple & Purple/Yellow gets looped for a automatic ECU
The Purple/Yellow & Lightblue/Yellow for a manual ECU

See http://forums.corral.net/forums/gen...manual-auto-differences-year-differences.html for more O2 sensor wiring harness info

Basic premise to use with transmission swaps:
Only run a 5 speed trans O2 harness with an A9L. Do not run an Auto O2 sensor harness with an A9L. Doing so will damage the computer’s internal signal ground.
Only run an Auto trans O2 sensor harness with an A9P in a car that has an Auto trans. Using a 5 speed trans O2 sensor harness with an Auto trans will cause no crank problems.
See http://www.stangnet.com/mustang-forums/749974-computer-issue.html#post7490537 for Joel5.0’s fix to the computer internal signal ground.

90 model year harness only works with 90 model cars without inspection/rework.
The 4 cylinder O2 harness uses 4 wire O2 sensors. It probably won’t work correctly without modifying it.

 

8

88vertgeetee

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#10

• May 10, 2013

• #10

So do I have to modify my o2 harness?

 

f8tlfiveo

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May 10, 2013

#11

• May 10, 2013

• #11

88vertgeetee said:

Has anyone run the a9p with no problems?

Click to expand...

I ran one for 3 years in my old car.. No issues

 

8

88vertgeetee

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May 11, 2013

#12

• May 11, 2013

• #12

Cool thanks all

 

jrichker

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May 11, 2013

#13

• May 11, 2013

• #13

88vertgeetee said:

So do I have to modify my o2 harness?

Click to expand...

Do you have a mismatch on the O2 sensor harness?

Recopmmended configuration:
Auto harness on auto trans.
5 speed harness on a 5 speed trans

 

TOOLOW91

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May 12, 2013

#14

• May 12, 2013

• #14

A9p t5 swap with auto harness with the Clutch pedal switch hooked up correctly , no issues


Sent from my iPhone using my fingers

 

8

88vertgeetee

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May 12, 2013

#15

• May 12, 2013

• #15

I didn't change anything on the o2 harnesses.

 

jrichker

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May 12, 2013

#16

• May 12, 2013

• #16

I am running a 5 speed transmission.
My A9P didn't require any modifcations to the O2 sensor harness.