Engine Help!! Code 56 new maf!

H

Hunterlanigan

New Member

Mar 16, 2021

5

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1

Ohio

Mar 16, 2021

#1

• Mar 16, 2021

• #1

I need some help! I’m working on my 90 gt, when I start it up it’ll lope and run really rich, there’s usually a good amount of black smoke. So I dumped the codes and the only two I get are 81 and 56. And I’ve been told not to worry about the 81. I don’t know why I’m getting a code 56 though? I have a brand new maf and pigtail. Could anyone give me some help?

Thanks

 

General karthief

wonder how much it would cost to ship you a pair

Mod Dude

Aug 25, 2016

27,826

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polk county florida

Mar 16, 2021

#2

• Mar 16, 2021

• #2

Any modifications?

 

H

Hunterlanigan

New Member

Mar 16, 2021

5

0

1

Ohio

Mar 16, 2021

#3

• Mar 16, 2021

• #3

Stock other than cold air intake. Other the last week the I’ve fixed a bunch of issues replaced thermostat, colant temp sensor, air charge temp sensor, plugs, alternator, battery. This is the only thing I just can’t figure out and to be honest I’m getting fed up with this thing..

 

General karthief

wonder how much it would cost to ship you a pair

Mod Dude

Aug 25, 2016

27,826

10,506

203

polk county florida

Mar 16, 2021

#4

• Mar 16, 2021

• #4

Help me create the "Surging Idle Checklist"

Updated 26-Oct-2019 to clarify creeping idle RPM increase as the car is being driven. Many of you are familiar with the "Cranks OK, but No Start Checklist for Fuel Injected Mustangs" checklist and the No Crank Checklist. They are very effective in finding and eliminating the problems by use of...

forums.stangnet.com

Do the list, be patient, take notes, ask questions here if needed.

 

H

Hunterlanigan

New Member

Mar 16, 2021

5

0

1

Ohio

Mar 16, 2021

#5

• Mar 16, 2021

• #5

I’m thinking it’s something to do with the maf since I got the code 56, but what should I test? The sensor it’s self is brand new

 

General karthief

wonder how much it would cost to ship you a pair

Mod Dude

Aug 25, 2016

27,826

10,506

203

polk county florida

Mar 16, 2021

#6

• Mar 16, 2021

• #6

Look through the list, it should tell you about the test procedure.

 

Mustang5L5

That is…until I whipped out my Bissell

Mod Dude

Feb 18, 2001

43,146

17,841

224

Massachusetts

Mar 16, 2021

#7

• Mar 16, 2021

• #7

Is it a stock replacement MAF? Brand new? What’s the part number on the MAF electronics?

code 56 is “MAF VOLTAGE TOO HIGH”. This could be due to the wrong MAF so step one is to verify its correct for your car

 

Reactions: General karthief

H

Hunterlanigan

New Member

Mar 16, 2021

5

0

1

Ohio

Mar 17, 2021

#8

• Mar 17, 2021

• #8

Ok thank you for that link I’ll go through it today. It’s supposed to be a stock replacement, it’s brand new from the parts store

 

H

Hunterlanigan

New Member

Mar 16, 2021

5

0

1

Ohio

Mar 19, 2021

#9

• Mar 19, 2021

• #9

Update: now when I turn the key on there’s a loud buzzing noise coming from the passenger side kick panel. Bad computer?

 

Mustang5L5

That is…until I whipped out my Bissell

Mod Dude

Feb 18, 2001

43,146

17,841

224

Massachusetts

Mar 19, 2021

#10

• Mar 19, 2021

• #10

There is an ECU relay in there. You’ll want to see if that is what is buzzing.

 

Reactions: General karthief

A

Anewjer00

New Member

Dec 15, 2021

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1

OKC

Jan 20, 2022

#11

• Jan 20, 2022

• #11

So any conclusions here ? FIXXED ?