Maf problems
Thread Starter
Intermediate
Joined: Jun 2019
Posts: 27
Likes: 0
Maf problems
Ok guys I have a 89 vett. I'm replacing the maf but I can't find a good brand that I know will work if read alot about ones that won't work but I can seem to find anything on one that is gerntied to work. Can you guys help what is a newer version of the maf for my car. Thanks guys
Last edited by Bigmike4098; Aug 12, 2019 at 11:10 AM.
Le Mans Master
Joined: Sep 2013
Posts: 6,192
Likes: 750
From: near the thumb in the mitten
I don't believe companies make defective parts on purpose. The OEM sensors were pretty good often replaced during the " guessing with money " diagnostic process. Reman with longest warranty and locally available. How confident in your diagnosis?
Last edited by Kevova; Aug 12, 2019 at 09:10 PM.
Burning Brakes
Joined: Nov 2000
Posts: 986
Likes: 487
It's working fine, and the surging idle is gone.
Burning Brakes
Joined: Jan 2005
Posts: 1,239
Likes: 4
From: Shelby Township Michigan
I’ve had 3 bad Spectra MAF from Oreilys so I ended up ordering a Delphi from Rockauto which will be delivered tomorrow so I’ll know soon. Spectra tested out of spec with each one.
Racer
Joined: Apr 2017
Posts: 396
Likes: 58
From: Katy Texas
I bought this one from Amazon to replace a reman Bosch unit:
https://smile.amazon.com/gp/product/...?ie=UTF8&psc=1
Have no idea who actually makes it but at $83 I figured I'd give it a shot. At 18 months it is working fine. The installation was plug and play and I actually noticed a faster start and smoother idle. Still the same after about 5000 miles.
I was having a recurring MAF burnoff error code that I could not clear which is why I bought this one. It did not fix the issue. I ended up buying a new eProm chip to get rid of the burnoff routine altogether.
https://smile.amazon.com/gp/product/...?ie=UTF8&psc=1
Have no idea who actually makes it but at $83 I figured I'd give it a shot. At 18 months it is working fine. The installation was plug and play and I actually noticed a faster start and smoother idle. Still the same after about 5000 miles.
I was having a recurring MAF burnoff error code that I could not clear which is why I bought this one. It did not fix the issue. I ended up buying a new eProm chip to get rid of the burnoff routine altogether.
Drifting
Joined: Nov 2015
Posts: 1,712
Likes: 331
Finalist 2020 C4 of the Year - Unmodified
Same for me. Few replacement MAFs, at reasonable prices, support the burn circuit. They work fine, but with code 33 active (ie "Sevice Now" lit), the ECM is running by defaults, not adjusting for current engine data as it should. Not good long term.
Burning Brakes
Joined: Jan 2005
Posts: 1,239
Likes: 4
From: Shelby Township Michigan
From the pictures the Delphi internally looks identical to the original one I'm replacing. The Spectra internally looks nothing like the original. Should be on my porch when I get home.
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
Top 10 Most Expensive Corvettes Ever Sold on Bring A Trailer
Brett Foote
10 Things Every Corvette Owner Needs (2026 Edition)
Michael S. Palmer
8 Most "Only Corvette Owners Understand" Quirks and Problems
Pouria Savadkouei
10 Reasons the C6 Z06 is Still A Performance Benchmark After 20 Years
Joe Kucinski
How Much Horsepower Every Corvette Engine "LOST" in 1972
Joe Kucinski
Top 10 DOs and DON'Ts for Protecting Your Convertible Top!
Michael S. Palmer
Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!
Joe Kucinski
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter
Joe Kucinski
8 Coolest Corvette Pace Cars (and Replicas) of All Time
Verdad Gallardo
Racer
Joined: Apr 2017
Posts: 396
Likes: 58
From: Katy Texas
Yes, exactly. Instead of a thin circle of wire like the Bosch, it appears to be two short wire lengths with some kind of bulb on each. And the heat sink is the same too.
I'm glad you brought this up. I had to pull the thing to have a look so I took the opportunity to spray some MAF cleaner on the bulbs and some carb cleaner down the throttle body. Since this different design has no burn off function, the spraying may not be necessary. Don't know.
I'm glad you brought this up. I had to pull the thing to have a look so I took the opportunity to spray some MAF cleaner on the bulbs and some carb cleaner down the throttle body. Since this different design has no burn off function, the spraying may not be necessary. Don't know.
Thread Starter
Intermediate
Joined: Jun 2019
Posts: 27
Likes: 0
Yeah I put it on and the original problem of it cutting out went away but it runs rough now. Seems to idle better but under heavy exhilaration it kinda sputters. But that mite just be based gas from it sitting for a few months.
Racer
Joined: Apr 2017
Posts: 396
Likes: 58
From: Katy Texas
Give the computer a few runs to see if the sputtering stops.
If not, then check the usual other suspects. Plugs, cap, rotor, wires, fuel filter, etc.
When I bought my 89 it sputtered a bit under heavy load -- turned out to be a loose spark plug cable.
If not, then check the usual other suspects. Plugs, cap, rotor, wires, fuel filter, etc.
When I bought my 89 it sputtered a bit under heavy load -- turned out to be a loose spark plug cable.
Racer
Joined: Apr 2017
Posts: 396
Likes: 58
From: Katy Texas
I ordered the eProm from PCM of NC. It's a daughter board with the burn off routine eliminated. I also had them turn off the VATS code as well. I had to take apart the ECM box to get the new daughterboard and the original eProm installed, it's too tight otherwise. Car runs like new.
Thread Starter
Intermediate
Joined: Jun 2019
Posts: 27
Likes: 0
Well see my first problem was my car run ok as long as you stayed under half throttle. If you go above it will start to stutter. And if you punched it would just cut out and fall on its face then go to stuttering. If changed everything but the dang injectors and ecm. And I drove it to work today and it's still doing it.
Racer
Joined: Apr 2017
Posts: 396
Likes: 58
From: Katy Texas
Are the catalytic converters original? The two small ones on mine fell apart and dumped into the middle one. Car behaved a bit like yours. Do you hear a rattling sound like rocks in a can? I got a muffler shop to just gut the center one too and it sounds better.