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Mass Air Flow Sensor (MAF) for 1988-1991 GM cars 74-2799

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General Motors Air Flow Meter 74-2799
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Mass Air Flow Sensor (MAF) for 1988-1991 GM cars 74-2799

Auto part – Mass Air Flow sensor / Airflow Meter / MAF for General Motors models from 1988 through 1991.

 

This is a refurbished and tested unit. Since this unit is a refurbished unit from a New Old Stock (NOS), it may have some marks or scratches, but it is in perfect working conditions and has not been used since it was refurbished and stocked.

 

The part number of this unit is 74-2799 from Cardone or 336-04894 from Hollander.

Other part numbers. The following are interchangeable part numbers that this part replaces:

 

  • 213-1618
  • 25532799
  • 25535419
  • AC Delco 24502966
  • GM 19112549
  • GM 88961000

NOTES:

 

  1. It is important to clean the throttle and clean or replace spark plugs after replacing a bad flow meter or MAF to prevent temporary malfunction of the replacement part.
  2. It is possible that a reset needs to be done in your car with a scanner to erase the old trouble codes and check if any of the codes persist.
  3. Do not use octane booster products. It is known that those products may cause harm to sensitive electronic fuel injection systems sensors and parts.

Applications. The following are the vehicles this unit fits:

 

Buick Electra (1988-1990):

 

1988 Buick Electra 6 Cylinders, 3.8L MFI OHV
1988 Buick Electra Park Avenue 6 Cylinders, 3.8L MFI OHV
1989 Buick Electra 6 Cylinders, 3.8L MFI OHV
1989 Buick Electra Park Avenue 6 Cylinders, 3.8L MFI OHV
1989 Buick Electra Park Avenue Ultra 6 Cylinders, 3.8L MFI OHV
1990 Buick Electra 6 Cylinders, 3.8L MFI OHV
1990 Buick Electra Park Avenue 6 Cylinders, 3.8L MFI OHV
1990 Buick Electra Park Avenue Ultra 6 Cylinders, 3.8L MFI OHV

 

Buick LeSabre (1988-1991):

 

1988 Buick Lesabre 6 Cylinders, 3.8L MFI OHV
1988 Buick Lesabre 6 Cylinders, 3.8L MFI OHV
1989 Buick Lesabre 6 Cylinders, 3.8L MFI OHV
1990 Buick Lesabre 6 Cylinders, 3.8L MFI OHV
1991 Buick Lesabre 6 Cylinders, 3.8L MFI OHV

 

Buick Reatta (1988-1990):

 

1988 Buick Reatta 6 Cylinders, 3.8L MFI OHV
1989 Buick Reatta 6 Cylinders, 3.8L MFI OHV
1990 Buick Reatta 6 Cylinders, 3.8L MFI OHV

 

Buick Riviera (1988-1990):

 

1988 Buick Riviera 6 Cylinders, 3.8L MFI OHV
1989 Buick Riviera 6 Cylinders, 3.8L MFI OHV
1990 Buick Riviera 6 Cylinders, 3.8L MFI OHV

 

Oldsmobile 88 (1988-1991):

 

1988 Oldsmobile 88 6 Cylinders, 3.8L MFI OHV
1989 Oldsmobile 88 6 Cylinders, 3.8L MFI OHV
1990 Oldsmobile 88 6 Cylinders, 3.8L MFI OHV
1991 Oldsmobile 88 6 Cylinders, 3.8L MFI OHV

 

Oldsmobile 98 (1988-1990):

 

1988 Oldsmobile 98 6 Cylinders, 3.8L MFI OHV
1989 Oldsmobile 98 6 Cylinders, 3.8L MFI OHV
1990 Oldsmobile 98 6 Cylinders, 3.8L MFI OHV

 

Oldsmobile Toronado (1988-1990):

 

1988 Oldsmobile Toronado 6 Cylinders, 3.8L MFI OHV
1989 Oldsmobile Toronado 6 Cylinders, 3.8L MFI OHV
1990 Oldsmobile Toronado 6 Cylinders, 3.8L MFI OHV

 

Pontiac Bonneville (1988-1991):

 

1988 Pontiac Bonneville 6 Cylinders, 3.8L MFI OHV
1989 Pontiac Bonneville 6 Cylinders, 3.8L MFI OHV
1990 Pontiac Bonneville 6 Cylinders, 3.8L MFI OHV
1991 Pontiac Bonneville 6 Cylinders, 3.8L MFI OHV

 

Others:

 

1989-1993 Buick Century, 6 Cylinder, 3.3L
1989-1993 Buick Skylark, 6 Cylinder, 3.3L
1992-1993 Oldsmobile Achieva, 6 Cylinder, 3.3L
1989-1991 Oldsmobile Cutlass Calais, 6 Cylinder, 3.3L
1989-1993 Oldsmobile Cutlass Ciera, 6 Cylinder, 3.3L
1992-1993 Pontiac Grand Am, 6 Cylinder, 3.3L

 

The function of a Flowmeter or MAF and symptoms when malfunctioning

 

If the flowmeter of your vehicle is failing, this situation will show different symptoms in different car models, but symptoms are all related. For example, the most common are:

 

  • Noticeable lower fuel economy
  • Black smoke or raw fuel smell from the exhaust
  • Engine not starting or hard to start
  • If the engine starts, very rough idle
  • Engine stalling or hesitation
  • Uniform soot/carbon dry stain in all spark plugs
  • Almost always a check engine code will be shown

 

Why does this happen? This happens because the flowmeter or MAF is in charge of metering the incoming air to the engine, so that way, the ECM (Engine Control Module) can adjust the amount of fuel being injected, to keep the ideal mixture needed by the engine, which is near 14.7 parts of air and 1 part of fuel (gasoline) or an air/fuel ratio of  14.7:1.

 

With no accurate measure of the incoming air, no accurate injection will occur, causing the symptoms describes above, among others, from a too lean (poor) or too rich fuel mixture.

 

Are Flowmeter, MAF, MAFS, Mass Air Flow Sensor the same?

 

Yes, it refers to the same part, which is a part used in engines to measure the amount of air entering the engine. The difference is that the earlier designs (flow meters) measured the incoming air in volume (cubic units per minute) and the newer ones, measure the air by mass (weight units per minute), which is more accurate for calculating the air/fuel mixture for the engine. Remember the chemistry class? They often mentioned, “measure the parts in weight instead of volume…”? Well, this is no exception.

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Weight 2 lbs
Dimensions 12 x 10 x 3 in
Part Number

74-2799

Manufacturer

Cardone

Part Type

Mass Air Flow Sensor (MAF)

Condition

Refurbished (NOS)

Application

1988-1991 General Motors Models

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