 Bad GM MAF?? |
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 Jun 27 2006, 04:06 PM
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#1
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 Eats and sleeps DSM jargin.  Group: Members Posts: 1,995 Joined: 27-November 04 From: Yates City IL Member No.: 389  |
I cannot get my low trim to stabalize at all since my MAF translator install. No matter what I adjust the translator to, with the car at idle, the low trim runs from 81 to 139 and back again. Could the MAF be going bad?
-------------------- 92 Eagle Talon TSI AWD "The Black Golfball" How fast can a 14B go???
91 Chevy C1500 "Problem Child" **SOLD** 01 Impala DD 07 Trailblazer Wife's new DD Cars run on blood, sweat, and horsepower... Without the first two, you can't get the last" SOB Racing "Sitting On Blocks" |
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Jun 27 2006, 06:03 PM
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#2
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 Post Master Group: Members Posts: 780 Joined: 14-July 04 Member No.: 338 |
Okay, I'm stepping out of my backyard a little here, but I think the 02 sensor would be at fault in this case. If the ECU can't get a solid reading from that little guy, it'll constantly be adjusting to an unstable reading, causing the sweeps you speak of. Anyhow, that would be my first course of action.
-------------------- QUOTE (gsxracer80 @ Oct 31 2006, 12:41 AM)
thanks hcar.... I am still massaging that area trying to get it ready...  |
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Jun 27 2006, 09:24 PM
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#3
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Eats and sleeps DSM jargin. Group: Members Posts: 1,995 Joined: 27-November 04 From: Yates City IL Member No.: 389 |
Thanks for the input Goat. Your logic make sense. Looking through the archives, I believe the general idea is get OEM Mitsu or Denso and stay away from Bosch. Anybody have any comments here?
Tonight I swapped in another MAF I had and the trims may have calmed down some. I'll check the trims again on the way to work tomorrow and see if it the same. -------------------- 92 Eagle Talon TSI AWD "The Black Golfball" How fast can a 14B go???
91 Chevy C1500 "Problem Child" **SOLD** 01 Impala DD 07 Trailblazer Wife's new DD Cars run on blood, sweat, and horsepower... Without the first two, you can't get the last" SOB Racing "Sitting On Blocks" |
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Jun 28 2006, 11:39 AM
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#4
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 Post Master Group: Members Posts: 908 Joined: 7-October 03 From: Chillicothe, IL Member No.: 182 |
You could also try turning the MAF. With GM MAFs and reducers the thing can be turned to where it won't see airflow at low flow rates.
-------------------- GVR4 866/1000 = the perpetually broken car
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Jun 28 2006, 12:08 PM
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#5
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Info Seeker Group: Members Posts: 51 Joined: 7-June 06 From: Mackinaw IL Member No.: 906 |
not to steal a thread but why do you say stay away from bosch? just wondering.
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Jun 28 2006, 12:17 PM
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#6
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Eats and sleeps DSM jargin. Group: Members Posts: 1,995 Joined: 27-November 04 From: Yates City IL Member No.: 389 |
I tried turning the first MAF and it made no differance.
Is there a orientation it's "supposed" to be? Looking on the internet, everyone seems to have different setups. Mine's in a draw through config so it's hard to find examples, most run blow through. The second one does vary some idling, 110-127. But nowhere near the first one where it would just cycle up and down the range 81-82-83 etc (at the speed it took to read those numbers). So I'll try rotating it and see if I can stop it completly With this MAF all the trims have seemed to stabalized lean, Hi 102, MID 106 and Low 110-127 so I need to bump up my base setting. I'm getting about .88 at WOT. -------------------- 92 Eagle Talon TSI AWD "The Black Golfball" How fast can a 14B go???
91 Chevy C1500 "Problem Child" **SOLD** 01 Impala DD 07 Trailblazer Wife's new DD Cars run on blood, sweat, and horsepower... Without the first two, you can't get the last" SOB Racing "Sitting On Blocks" |
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Jun 28 2006, 02:30 PM
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#7
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 Eats and sleeps DSM jargin. Group: Moderators Posts: 1,156 Joined: 23-September 02 Member No.: 16 |
It is supposed to be clocked so that the rectangular portion of the sensor is positioned so it is at the 'top'. having said that, a lot of people never have a problem 'kicking' to the side.
I like to 'kick' it, sure. That's why I have my license plate frenched into my tailgate on my s10 bagged pickup at a carazay angle. But then again, I'm a rebel who follows his own path, not some conformist who 'plays by the rules'. So all you suckers out there who 'walk the line' and 'play fair' can eat my dust while I billy bad-ass it up, shaking and baking my way into and out of wacky situations. That's just me. -------------------- my cars breath smells like car food
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Jun 28 2006, 09:00 PM
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#8
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Eats and sleeps DSM jargin. Group: Members Posts: 1,995 Joined: 27-November 04 From: Yates City IL Member No.: 389 |
Ok, somethings not right. Tried to do so WOT pulls. The car was bucking like crazy and I thought it was fuel cut. But it bucked 5-6 times. So I pulled the log. The O2 reading at WOT are not right. It's put out random .02V at 100% TPS. I was thinking it was fuel cut, but there's still injector pulses, so it can't be fuel cut. I also noticed a black cloud after one of the bucking.
Here's some logs: LOG Graph Downloading the pic will make it look better LOG DATA What do you guys think? I'm thinking Goat mighted of guessed it right with the o2 sensor. -------------------- 92 Eagle Talon TSI AWD "The Black Golfball" How fast can a 14B go???
91 Chevy C1500 "Problem Child" **SOLD** 01 Impala DD 07 Trailblazer Wife's new DD Cars run on blood, sweat, and horsepower... Without the first two, you can't get the last" SOB Racing "Sitting On Blocks" |
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Jun 28 2006, 09:12 PM
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#9
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Post Master Group: Members Posts: 780 Joined: 14-July 04 Member No.: 338 |
Or perhaps the Goat has sabotaged all who oppose him. SUCK ON THAT, SWEETHEART!!!!!!!!!
-------------------- QUOTE (gsxracer80 @ Oct 31 2006, 12:41 AM)
thanks hcar.... I am still massaging that area trying to get it ready... |
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Jun 28 2006, 09:20 PM
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#10
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Eats and sleeps DSM jargin. Group: Members Posts: 1,995 Joined: 27-November 04 From: Yates City IL Member No.: 389 |
Maybe all my ramblings are a huge decoy to lure you into a sence of false confidence!!
 Maybe we should just line up and settle it! Wait....that's right....you're NOT GOING!!!! EDIT***** I see you did sign up! Let's see who has the best junk! 
-------------------- 92 Eagle Talon TSI AWD "The Black Golfball" How fast can a 14B go???
91 Chevy C1500 "Problem Child" **SOLD** 01 Impala DD 07 Trailblazer Wife's new DD Cars run on blood, sweat, and horsepower... Without the first two, you can't get the last" SOB Racing "Sitting On Blocks" |
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Jun 28 2006, 09:31 PM
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#11
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 Eats and sleeps DSM jargin. Group: Members Posts: 1,754 Joined: 25-June 04 From: 61554 Member No.: 314 |
QUOTE (black92_tsi_awd @ Jun 28 2006, 10:20 PM) EDIT***** I see you did sign up! Let's see who has the best junk! that would be me
-------------------- ┌∩┐(◣_◢)┌∩┐
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Jun 29 2006, 06:18 AM
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#12
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Eats and sleeps DSM jargin. Group: Members Posts: 1,995 Joined: 27-November 04 From: Yates City IL Member No.: 389 |
Sorry...saw "Goat" and jumped to the wrong conclusion!
I stand by my previous taunt! -------------------- 92 Eagle Talon TSI AWD "The Black Golfball" How fast can a 14B go???
91 Chevy C1500 "Problem Child" **SOLD** 01 Impala DD 07 Trailblazer Wife's new DD Cars run on blood, sweat, and horsepower... Without the first two, you can't get the last" SOB Racing "Sitting On Blocks" |
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Jun 29 2006, 06:24 AM
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#13
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DSM Tech Wizard Group: Members Posts: 2,256 Joined: 10-January 01 From: central IL Member No.: 10 |
QUOTE (black92_tsi_awd @ Jun 28 2006, 09:20 PM) Let's see who has the best junk! I'm right here.... -------------------- The fastest car I own is a minivan....
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Jun 29 2006, 06:39 AM
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#14
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Eats and sleeps DSM jargin. Group: Members Posts: 1,995 Joined: 27-November 04 From: Yates City IL Member No.: 389 |
I hear ya...
-------------------- 92 Eagle Talon TSI AWD "The Black Golfball" How fast can a 14B go???
91 Chevy C1500 "Problem Child" **SOLD** 01 Impala DD 07 Trailblazer Wife's new DD Cars run on blood, sweat, and horsepower... Without the first two, you can't get the last" SOB Racing "Sitting On Blocks" |
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Jun 29 2006, 11:08 AM
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#15
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Post Master Group: Members Posts: 780 Joined: 14-July 04 Member No.: 338 |
QUOTE (black92_tsi_awd @ Jun 28 2006, 09:20 PM) Maybe we should just line up and settle it! You got it, pal! Oh, wait.... you'll prolly not even make it in the pre-quals, so I guess you'll have to wait until your car gets some bigger yams. Darn. In all seriousness, I'm excited to see what the car can do with this itty bitty turbo. Not sure what exactly setup I'll be running for fuel/boost and all. We shall see.... -------------------- QUOTE (gsxracer80 @ Oct 31 2006, 12:41 AM)
thanks hcar.... I am still massaging that area trying to get it ready... |
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Jun 29 2006, 11:14 AM
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#16
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Eats and sleeps DSM jargin. Group: Members Posts: 1,995 Joined: 27-November 04 From: Yates City IL Member No.: 389 |
In all seriousness aslo, I'm just busting your balls to get you to go. Misery love compary!
-------------------- 92 Eagle Talon TSI AWD "The Black Golfball" How fast can a 14B go???
91 Chevy C1500 "Problem Child" **SOLD** 01 Impala DD 07 Trailblazer Wife's new DD Cars run on blood, sweat, and horsepower... Without the first two, you can't get the last" SOB Racing "Sitting On Blocks" |
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Jun 29 2006, 11:42 AM
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#17
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Post Master Group: Members Posts: 908 Joined: 7-October 03 From: Chillicothe, IL Member No.: 182 |
Gap your plugs to .026. It sounds like spark blowout to me.
-------------------- GVR4 866/1000 = the perpetually broken car
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Jun 29 2006, 12:56 PM
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#18
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 Zen Master DSM Group: Moderators Posts: 3,008 Joined: 10-January 01 From: in front of you Member No.: 5 |
I was thinking along the same lines. You may also want to upgrade the plug wires if they are still the stockers.
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Jun 29 2006, 05:14 PM
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#19
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Eats and sleeps DSM jargin. Group: Members Posts: 1,995 Joined: 27-November 04 From: Yates City IL Member No.: 389 |
Plug wire are magnacore and in decent shape.
I put a Bosch o2 sensor in, Mitsu could get an OEM one until next week. Things were great for about half an hour. Trims were decent, most importantly it pulled like a freight train with no fuel cut, no bucking. Great right?!?! Well on the way home the o2 sensor went to sleep. At idle it reads .00!! Rev the motor it picks up a little and settle back to .00. WTF is going on here? I check continuity between the plug connection and there good. Car seems to run fine but I can't trust it not melting down. -------------------- 92 Eagle Talon TSI AWD "The Black Golfball" How fast can a 14B go???
91 Chevy C1500 "Problem Child" **SOLD** 01 Impala DD 07 Trailblazer Wife's new DD Cars run on blood, sweat, and horsepower... Without the first two, you can't get the last" SOB Racing "Sitting On Blocks" |
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Jun 29 2006, 06:29 PM
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#20
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 Eats and sleeps DSM jargin. Group: Members Posts: 1,108 Joined: 2-October 05 From: Waverly, Illinois Member No.: 636 |
Have you checked your caps in the ecu?
-------------------- Thanks, Bud!
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