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MAF Code 34 Help

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Old Mar 10, 2026 | 03:47 PM
  #1  
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From: Gibsonia Pa
Car: 1986 Camaro Iroc
Engine: 5.0 TPI
Transmission: 700R4
Axle/Gears: 3.23
MAF Code 34 Help

So I have a code 34 on my 1986 Camaro 5.0 TPI.
Car has 66,000 miles.
I followed the Diagnostic Tree which lead to the MAF sensor being bad.
Car runs well except the idle is rough and at times wants to stall.
I installed a new BSE #57854
Car will start and idle. The second you touch the throttle, car stalls and will not run.
I’m not sure what the problem is. Any suggestions ?
Car has new spark plugs and distributor cap and rotor.
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Old Mar 11, 2026 | 08:30 AM
  #2  
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From: North Central Indiana! GO IRISH
Car: 89 PONTIAC TRANS AM
Engine: 5.0 TPI
Transmission: Stock 4SP 700R4
Axle/Gears: 4TH GEN 3:23
Re: MAF Code 34 Help

I cant speak for anyone else and the experiences they have had but I had code 34 MAFalso on my TPI car and tried a few of the aftermarket MAF sensors including the BSE one you mentioned and a few others from other parts store. the code would go away but always came back. I finally broke down and purchased a used OEM GM MAf from hawks and I have not had any issues since
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Old Mar 11, 2026 | 09:06 AM
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From: Gibsonia Pa
Car: 1986 Camaro Iroc
Engine: 5.0 TPI
Transmission: 700R4
Axle/Gears: 3.23
Re: MAF Code 34 Help

Originally Posted by scottycamaroz28
I cant speak for anyone else and the experiences they have had but I had code 34 MAFalso on my TPI car and tried a few of the aftermarket MAF sensors including the BSE one you mentioned and a few others from other parts store. the code would go away but always came back. I finally broke down and purchased a used OEM GM MAf from hawks and I have not had any issues since
Ok. Thanks for the help. I am looking for a used Bosh one as we speak.

Pete
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Old Mar 11, 2026 | 10:04 AM
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From: Franklin, KY near Beech Bend Raceway, Corvette Plant and Museum.
Car: 1992 Pontiac Firebird
Engine: 5.0L L03 TBI
Transmission: 700R4
Axle/Gears: 2.73
Re: MAF Code 34 Help

Howell EFI has used OEM MAFs with a money-back guarantee. I thought 1985 MAFs were different from 1986 to 1989 MAFs. I'm not into the pre 1987 cars though.

Used with production TPI systems from 1985-89. Recommended for replacement on stock systems or for any engine with non-standard displacement, or low-idle vacuum camshaft. Used units sold with a money-back guarantee. $150.00


#MA201 - MASS AIR FLOW SENSOR: 1985-89 TPI (Used) - Howell EFI

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Old Mar 11, 2026 | 10:24 AM
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pete2833's Avatar
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From: Gibsonia Pa
Car: 1986 Camaro Iroc
Engine: 5.0 TPI
Transmission: 700R4
Axle/Gears: 3.23
Re: MAF Code 34 Help

Originally Posted by Airwolfe
Howell EFI has used OEM MAFs with a money-back guarantee. I thought 1985 MAFs were different from 1986 to 1989 MAFs. I'm not into the pre 1987 cars though.

Used with production TPI systems from 1985-89. Recommended for replacement on stock systems or for any engine with non-standard displacement, or low-idle vacuum camshaft. Used units sold with a money-back guarantee. $150.00


#MA201 - MASS AIR FLOW SENSOR: 1985-89 TPI (Used) - Howell EFI
ok. Thx.
Are they Reman Units ?
85’s have a one year MAF sensor. Won’t work on 86-89 cars.

Pete
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Old Mar 11, 2026 | 11:12 AM
  #6  
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From: Franklin, KY near Beech Bend Raceway, Corvette Plant and Museum.
Car: 1992 Pontiac Firebird
Engine: 5.0L L03 TBI
Transmission: 700R4
Axle/Gears: 2.73
Re: MAF Code 34 Help

I think they are just nice quality used original OEM Bosch MAFs.

Howell EFI is a very reputable company that has been around for many decades.
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Old Mar 11, 2026 | 11:28 AM
  #7  
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From: Gibsonia Pa
Car: 1986 Camaro Iroc
Engine: 5.0 TPI
Transmission: 700R4
Axle/Gears: 3.23
Re: MAF Code 34 Help

Originally Posted by Airwolfe
I think they are just nice quality used original OEM Bosch MAFs.

Howell EFI is a very reputable company that has been around for many decades.
ok. I will have to order one !
thanks for the help.

Pete
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Old Mar 11, 2026 | 01:41 PM
  #8  
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From: Gibsonia Pa
Car: 1986 Camaro Iroc
Engine: 5.0 TPI
Transmission: 700R4
Axle/Gears: 3.23
Re: MAF Code 34 Help

@Airwolfe I called Howell and they have non in stock and said they probably never will have the in stock again. Thx anyway. Ugh.
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Old Mar 11, 2026 | 04:09 PM
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From: Franklin, KY near Beech Bend Raceway, Corvette Plant and Museum.
Car: 1992 Pontiac Firebird
Engine: 5.0L L03 TBI
Transmission: 700R4
Axle/Gears: 2.73
Re: MAF Code 34 Help

Sorry. I guess they need to update their website then. It sounded too good to be true.

How come you can get forty-eleven different size and brands MAFs for a Fox body Mustang that will work fine with the ECM but you can't even get a effing stock rebuild OEM MAF for a TPI engine that works for crap and none of the new ones are even close to right?

3rd gens suck!!!

I'm into turbo Buicks too. I can get a MAF translator for them and use every damn MAF GM has ever made with it.

Last edited by Airwolfe; Mar 11, 2026 at 04:14 PM.
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Old Mar 11, 2026 | 07:07 PM
  #10  
pete2833's Avatar
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From: Gibsonia Pa
Car: 1986 Camaro Iroc
Engine: 5.0 TPI
Transmission: 700R4
Axle/Gears: 3.23
Re: MAF Code 34 Help

Originally Posted by Airwolfe
Sorry. I guess they need to update their website then. It sounded too good to be true.

How come you can get forty-eleven different size and brands MAFs for a Fox body Mustang that will work fine with the ECM but you can't even get a effing stock rebuild OEM MAF for a TPI engine that works for crap and none of the new ones are even close to right?

3rd gens suck!!!

I'm into turbo Buicks too. I can get a MAF translator for them and use every damn MAF GM has ever made with it.

Yea I was wondering the same thing.
There is a market for 3rd Gen’s and I’m not sure why everyone stopped making MAF sensors and relays for them. The ones being made aren’t right.
I don’t know where to look next besides spending $150 on eBay for a used unit that may be the same as mine.
if anyone has gotten a new or Reman unit to work in their car can you let me know ?

Pete
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