Just wondering how many of these POS's youve had to replace cause im i need a 3rd now in less than a year..... i found out they put bosch remanufactured ones in though. Could the MAF relays be the cause to this??? How many have you guys replaced?

 

3 TPI motors - 2 L98's and 1 LB9(transplanted into an S15). 0 complete failures, 1 hotwire showed signs of corrosion(the Jimmy). The sensored worked fine, but being a nervous nelly I bought a used replacement from eBay($40) and put it in before I sold the Jimmy in March. All three had their mesh removed, but the fins were left unmolested. One I opened-up the exit end(which is 0.2" smaller than the entrance) with a dremel and 800 grit sanding roll.

Honestly, ya got me nervous now. I'm thinkin I mighta been lucky so far. And luck has a way of running out at the most inopportune time.

 

Do your burnoff and power relays, my maf was ****ing with me and I did the relays and cleaned the connectors and it runs great now. Plus those things are dirt cheap I believe someone quoted 7 bucks or so I paid 20 CAN$ from GM and that is far cheaper then a MAF.

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1989 Trans Am GTA, 5.7L TPI, TH700-R4, T-Tops, dual cats, 9-bolt rear, 3.27, Dynomax muffler, K&N
1992 Camaro RS, 5.0L TBI, T-5, T-Tops, 3.08, L69 Dual Snorkel, K&N - Sold

 

Definitely change the relays. On mine the connectors to the relays had the wires pulled out, stripped and frayed. I just opened up the connectors, pushed out the pins, and soldered them to the wires. Solved 8 months of crappy running.

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88 IROC with cobbled together (not by me)drivetrain, 86 (?) TPI unit,CE subframe connectors, Edelbrock strut tower brace, polygraphite bushings all around...it handles like a dream, but man is it hard to push!!

 

I agree with every1 else, look into the relays.

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89 RS

STILL Looking For:
An 87 IROC-Z28 350 TPI

 

3 cars, approx. 150,000 miles I drove them for, never had a failure. I did replace one on a spending spree trying to fix an unrelated problem, and it didnt work so now I have a spare. One of these has 160k on it, the other car had 70k on it when I sold it, although I know it had been replaced numerous times by GM under warranty, but it was actually mis-diagnosed and I doubt was actually faulty.

 

I've replaced one MAF, and used the Wells unit as a replacement. I'll probably never replace another one, and certainly will never fracture a hot wire again.

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Later,
Vader
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"Get UP - Drop the bombshell!"
Adobe Acrobat Reader

 

Whew! Feel a lot less nervous now. Thought I was living on borrowed time. Figured a bad MAF might leave me stranded like that $#@&*)(! fuel pump.

Then again, may see if I can ****** another cheap one for my "just-in-case" kit.

 

The one I have that has 160k on it had screens removed at 28k miles.

And a MAF wont leave you stranded, just pull the wire off, done deal. You can even run without the TPS. Or the o2. Amazing huh? Maybe someday I'll experiment and see how many sensors you can disconnect and still drive

 

Or how many codes you can get stored in one trip

 

How does a car run without the MAF connected, good or what??

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89 RS

STILL Looking For:
An 87 IROC-Z28 350 TPI

 

Runs yes, but runs very rich and it's not good to run without a MAF for long.... Last summer it crapped out on me, and I disconnected it and drove the car home, but I didn't drive it any further till I got a replacement MAF.... Also got the Wells unit, and it's been very good to me so far...

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ZaphodB a.k.a Carl Andersson - zaphodb@faxancruisers.org
'89 Camaro IROC-Z 5.7L TPI - Mods under construction :-)
Custom ARAP Chip Under Development/180 t-stat, Edelbrock TES Headers,
SLP Airfoil, K&N Filters, Accel 8mm wires, Relocated MAT, AFPR @ 45 PSI

 

Depends on the car, but generally speaking no it doesnt run real good. It sometimes takes a while for it to run a little better, but a properly working system is best in any case.

 

I've unplugged mine and my car dies! Won't start back up until I plug it back in. Maybe mines just more sensitive or something.

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See my Ride:
https://www.thirdgen.org/rides/index...ew&rideid=1324

 

 

I've changed all of the relays, on my third MAF.. the car won't start with it plugged in, go figure.

I think it would be cheaper to change to speed density.. what rewiring is needed for that?

[This message has been edited by rezinn (edited August 26, 2001).]

 

I had mine fail and kill the car also. Just as a precautionary, I changed both MAF and burnoff relay, and also went to GM and got a new connector to the MAF unit itself since mine looked a bit worn out.

When the car won't run, or runs like crap at ideal,but it does run with it unplugged, 9 outta 10 you have a bad sensor. But just remember that soemthing caused the sensor to go bad. I think in my case the burn off relay was sticking on and keep frying it cause I always had the most problems upon restarting the car after it was shut off a short period of time.

Their are post's that have info on a MAF that uses a diffents fillament rathere that that extremely thin gauge wire that Bosh uses. Glenn I believe is running one.

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Michael Graeber

My Garage

1)83 Z-28 T-Top: Full cage, 9" w/ lad.bars, Midwest Engine Tech 406sbc,Strip Dominator, 1000-CFM Demon Carb, Phase VI Chevy Bowtie Heads 2.05/1.60, .630" Crower roller set-up, 1 3/4 coated Hookers 3" true dual exhaust th400, fuel cell & still not running

2)89 Formula WS-6 305 TPI Auto Daily Driver: minor motor mods, more suspension stuff. MODS

one with a good car needs to be justified." JBMHR - Ministry

 

Max,

I realize the motor will run with the MAF disconnected. But if I'm 250 km away from home(as was the case when the FP packed it in), I won't be too keen to continue on in "Limp Home".

So much for the idea of getting another one cheap. This week they're going for $100+ on ebay(used to go in the $40 - 60 range). At that rate, might as well just get a new Well unit. Swap that in, and use the old one as a spare.

 

I put in a new Fuel, MAF power, MAF burn off relay in and it went from zero to hero.... definetely a huge improvement.... but i think the bad relays ruined the MAF sensor on it. Could that BE???