Aftermarket MAF’s

[Rugbyfan]

I have a 3.5” maf (I know it doesn’t make more power but I purchased it 6 years ago). It was an original 800 Bosch maf that crapped the bed. I replaced it with a junkyard 740 maf to hold me over (random off brand). If I buy a new maf, should I go for any new maf or spring for the Bosch 800? What say you r3v? If Dave Markert could weigh in that’d be great. Dave, have you seen much difference in Bosch vs eBay/off brand (of any size)? Old vs new?

[TobyB]

Aftermarket MAFs get a bad rap. I've had no luck with them in 2 different cars...

anecdotally,
t

[Rugbyfan]

That’s what I’m leaning towards. Rather than junkyard an 800 I’ll probably buy new. A lot of the wrx guys replace them proactively @ 100k, despite no code. Are MAF’s a wear item on obd-1 cars? I’ve never threw a code on any vehicles and just periodically cleaned with CRC. What’s optimal?

[BlackSpeed66]

From my personal experience, I'd go w/ a used OEM MAF over an new aftermarket one. I bought a $50 aftermarket MAF on eBay since I was trying to uncover some other fuel trim issues I was having after the swap. I guess i just had to learn on my own, but I spent several months chasing a CEL after addressing some initial issues and then a buddy said "what about the original MAF that came w/ the engine?"

Derp.

Popped the original one w/ 150k miles back in and haven't had a CEL since... :up:

[TobyB]

I haven't heard of changing them unless you're chasing something.
On OBD2, it's easy to check fuel trims, and if they're in the window, the MAF's
considered good.
OBD1's not so easy, tho...

t

[AndrewBird]

I bought a Bosch one from Autohaus a few months ago and haven't looked back. Was the cheapest I could find. Paid $186. Well worth it to me.

[Rugbyfan]

I bought a new Bosch 800 on Amazon. $140 shipped. I also grabbed the air box Venturi from a 740. Now my intake goes from just behind the headlight (4”) to kamotors shielded filter to 3.5” Venturi to 3.5”Maf to stock tb. May not make more power but I now know that I will have a good Maf reading and it sounds great!

[ba114]

If OBD2, buy a $15 slot MAF and adjust the MAF scalar to accommodate it. Works great

[Rugbyfan]

Obd-1 unfortunately. I threw the new maf on and the car runs great but I had the Maf code 29 flash near redline (trm). They suggested trying different clocking positions. My car seems very sensitive to clocking. 9 o clock and 12 o clock won’t allow the car to rev over 5k rpm. No codes though so I’m stumped. I didn’t realize clocking had such an effect. My intake has no bends before or after the maf

[Rugbyfan]

This is crazy, I’m out testing it right now and by adjusting clocking 1” clockwise or ccw I am bracketing it back to the sweet spot. I’m back to full 7krpm limit, but with Maf code 29 at redline

[jjc034]

I'm running a VMP5000 MAF and simply cut the E36 MAF wiring and spliced in the VMP adapter.

[TeXJ]

Obd-1 unfortunately. I threw the new maf on and the car runs great but I had the Maf code 29 flash near redline (trm). They suggested trying different clocking positions. My car seems very sensitive to clocking. 9 o clock and 12 o clock won’t allow the car to rev over 5k rpm. No codes though so I’m stumped. I didn’t realize clocking had such an effect. My intake has no bends before or after the maf

Clocking of what?