mass airflow sensor

89CobraGT

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Dec 14, 2005

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Winnipeg manitoba

May 22, 2007

#1

• May 22, 2007

• #1

I finally installed my mass airflow sensor with my 24/lb injetors its supposed to be calibrated for them anyways I redid alot of wirirng and added a 255 lph fuel pump and fixed a leak in my intake.. So I finally started my car for about 2 mins and it ran like ass Im thinking its my mass air flow sensor.. or is it supposed to run like crap for a while till the computer umm does its thing ?? anyways I need help thanks

 

vristang

15 Year Member

Mar 31, 2005

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May 22, 2007

#2

• May 22, 2007

• #2

Pull the diagnostic codes...

Is it cal'd for the injectors as well as the ecu?

If this is a MAF conversion, did the MAP sensor get the vac line capped off?


jason

 

89CobraGT

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Dec 14, 2005

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May 22, 2007

#3

• May 22, 2007

• #3

its not a conversion when I bought the injectors the mass came with it... it said it was calibrated for the injectors it was a kit for my mustang from jegs I noticed they don't sell it anymore errr. I only ran the car for a few seconds... I've had this hooked up before and I unhooked my mass airflow and put my stock one back on and it ran OK but... I've heard it was bad to run the stock MASS with my 24's anyways I dunno what to do lol any help would be appreciated..

 

HISSIN50

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

15 Year Member

Nov 29, 1999

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May 23, 2007

#4

• May 23, 2007

• #4

You're right - the stock MAS and 24's would lead to rich running.

Do you have a part number or something to cross reference on the MAS?

Good luck.

 

vristang

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Mar 31, 2005

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May 23, 2007

#5

• May 23, 2007

• #5

89CobraGT said:

its not a conversion when I bought the injectors the mass came with it... it said it was calibrated for the injectors it was a kit for my mustang from jegs I noticed they don't sell it anymore errr. I only ran the car for a few seconds... I've had this hooked up before and I unhooked my mass airflow and put my stock one back on and it ran OK but... I've heard it was bad to run the stock MASS with my 24's anyways I dunno what to do lol any help would be appreciated..

Click to expand...

Since you did some wiring work, at least pull the KOEO codes. Even if the motor is not at operating temp, this could give you some good information.


If you don't find anything with KOEO, then start the motor back up and run the KOER.

The fact is... without the codes (at least the KOEO's), we are just guessing...



As JT said, some part numbers & brand names may allow others to confirm that the kit you purchased is appropriate for what you are doing.
It wouldn't be the first time someone was shipped the wrong part number...



jason

 

jrichker

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May 23, 2007

#6

• May 23, 2007

• #6

Help for dumping the codes in case you haven't done it before...

Dump the codes and see what the computer says is wrong…Codes may be present in the computer even if the Check Engine light isn’t on.

Here's the link to dump the computer codes with only a jumper wire or paper clip and the check engine light, or test light or voltmeter. I’ve used it for years, and it works great.

See http://www.troublecodes.net/Ford/
OR
See http://www.mustangworks.com/articles/electronics/eec-iv_codes.html

IF your car is an 86-88 stang, you'll have to use the test lamp or voltmeter method. There is no functional check engine light on the 86-88's except possibly the Cali Mass Air cars.

Codes have different answers if the engine is running from the answers that it has when the engine isn't running. It helps a lot to know if you had the engine running when you ran the test.

Trouble codes are either 2 digit or 3 digit, there are no cars that use both 2 digit codes and 3 digit codes.

For those who are intimidated by all the wires & connections, see http://www.actron.com/product_detail.php?pid=16153 for what a typical hand scanner looks like. Normal retail price is about $30 or so at AutoZone or Wal-Mart.

Or for a nicer scanner see http://www.midwayautosupply.com/pc-7208-90-equus-digital-ford-code-reader-3145.aspx – It has a 3 digit LCD display so that you don’t have to count flashes or beeps.. Cost is $30.

 

89CobraGT

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May 23, 2007

#7

• May 23, 2007

• #7

Err I dont have one of those code puller things I know my friends do though... also heres the number of my injetors 397-M-9593-A302F thats a jegs part number there ford injectors... According to the top of my MASS airflow sensor the number is AFH90-13 5H23 its a Granatelli I bought it a year ago though and can't find it thanks for all your help

 

jrichker

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#8

• May 23, 2007

• #8

89CobraGT said:

Err I dont have one of those code puller things I know my friends do though... also heres the number of my injetors 397-M-9593-A302F thats a jegs part number there ford injectors... According to the top of my MASS airflow sensor the number is AFH90-13 5H23 its a Granatelli I bought it a year ago though and can't find it thanks for all your help

Click to expand...

You don't have a paper clip? Thats all it takes.

Send me your land address and I will send you a certified to dump codes paper clip. :

 

89CobraGT

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Dec 14, 2005

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May 23, 2007

#9

• May 23, 2007

• #9

ohhh lmao I thought u needed to see the numbers

 

89CobraGT

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May 23, 2007

#10

• May 23, 2007

• #10

Soo I ended up changing my MASS back to stock.. I just cant get it to idle properly v_v soo now im running really rich I got white exhaust and brought my car up to runing temps and then it died multiple times err im lost I'll be back later to take a look agian I need to go to school Thanks for all your imput

 

Ike83

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Sep 27, 2006

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St. Louis, Missouri

May 23, 2007

#11

• May 23, 2007

• #11

I've heard bad things about the Granatelli MAF, that's why I went with the Pro-M.

Probably not what's causing your problem anyway. Just thought I'd share. Good Luck.

 

89CobraGT

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Dec 14, 2005

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Winnipeg manitoba

May 23, 2007

#12

• May 23, 2007

• #12

well I think I found the problem after changing my intake gasket on my BBK SSI for the 4th time.. I still have a vaccum leak I didnt hear it before becasue the Granatelli MASS made it run so bad with the vaccum leak.. I'm pretty sure the intake is warped I'm gonna go get it machined thanks for all of your help