Electronics Need help wiring something up? Thinking of adding an electrical component to your car? Need help troubleshooting that wiring glitch?

MAF problems.

Thread Tools
 
Search this Thread
 
Old Sep 1, 2004 | 04:34 PM
  #1  
89IROCZTPI's Avatar
Thread Starter
Member
iTrader: (1)
 
Joined: Oct 2003
Posts: 288
Likes: 0
From: South Carolina
Car: 1989 IROCZ
Engine: Rebuilt 350 TPI
Transmission: 700r4
MAF problems.

I originally posted this question in the tech/general engine forums, but after a few replies, it makes me think my problem(s) may be electrical. My symptoms are thus: If the MAF is plugged in, the engine wont stay running, it stalls out. If I unplugg the MAF, it idles fine, albiet a bit rough. Ive read through my haynes manual and the only thing I could see was a burn off relay and a 20a in line fuse, and the ECM fuse under the dash(which was the only one I could actually find, and its ok) Looking for some help as to isolate my problem further, and to see if I need to get a new MAF sensor or not, thanks!
Reply
Old Sep 1, 2004 | 07:38 PM
  #2  
Trickster's Avatar
TGO Supporter
 
Joined: Sep 2003
Posts: 6,127
Likes: 11
From: conway, s.c.
Car: 1989 Iroc-Z
Engine: 5.7L TPI
Transmission: 700R4
You also have a MAF Sensor power relay sitting next to the burn-off relay. Have you checked the connector on the MAF sensor? Are you getting any trouble codes?
Reply
Old Sep 1, 2004 | 08:25 PM
  #3  
89IROCZTPI's Avatar
Thread Starter
Member
iTrader: (1)
 
Joined: Oct 2003
Posts: 288
Likes: 0
From: South Carolina
Car: 1989 IROCZ
Engine: Rebuilt 350 TPI
Transmission: 700r4
This is pretty much the area im lost at, the Haynes manual sucks as far as telling/showing me where the relays are, or what I should be looking for as far as possible problems. The plug itself looks fine, ill recheck the sensor also. Thanks Trickster.
Reply
Old Sep 1, 2004 | 08:34 PM
  #4  
Trickster's Avatar
TGO Supporter
 
Joined: Sep 2003
Posts: 6,127
Likes: 11
From: conway, s.c.
Car: 1989 Iroc-Z
Engine: 5.7L TPI
Transmission: 700R4
Here is a picture of the relays, the MAF relays are the ones to the right of the fuel pump relay on the driver side firewall.
Attached Thumbnails MAF problems.-relay.jpg  
Reply
Old Sep 1, 2004 | 08:40 PM
  #5  
89IROCZTPI's Avatar
Thread Starter
Member
iTrader: (1)
 
Joined: Oct 2003
Posts: 288
Likes: 0
From: South Carolina
Car: 1989 IROCZ
Engine: Rebuilt 350 TPI
Transmission: 700r4
very nice Trickster thanks!! I did check the middle one, the plug itself looked fine, should I unbolt them from the wall and check them? Also, is there any way you could tell me what readings I could take at the plug going into the sensor itself?
Reply
Old Sep 1, 2004 | 08:50 PM
  #6  
Trickster's Avatar
TGO Supporter
 
Joined: Sep 2003
Posts: 6,127
Likes: 11
From: conway, s.c.
Car: 1989 Iroc-Z
Engine: 5.7L TPI
Transmission: 700R4
Sure, here is a chart for the code 33 that should help you.
Attached Thumbnails MAF problems.-code-33tpi.gif  
Reply
Old Sep 1, 2004 | 08:51 PM
  #7  
Trickster's Avatar
TGO Supporter
 
Joined: Sep 2003
Posts: 6,127
Likes: 11
From: conway, s.c.
Car: 1989 Iroc-Z
Engine: 5.7L TPI
Transmission: 700R4
part 2
Attached Thumbnails MAF problems.-code-33atpi.gif  
Reply
Old Sep 1, 2004 | 08:55 PM
  #8  
89IROCZTPI's Avatar
Thread Starter
Member
iTrader: (1)
 
Joined: Oct 2003
Posts: 288
Likes: 0
From: South Carolina
Car: 1989 IROCZ
Engine: Rebuilt 350 TPI
Transmission: 700r4
you are the MAN my friend!!! Once again you come through Now how can I just get my hands on one of the handy books you have? Thanks again!!
Reply
Old Sep 1, 2004 | 09:32 PM
  #9  
Trickster's Avatar
TGO Supporter
 
Joined: Sep 2003
Posts: 6,127
Likes: 11
From: conway, s.c.
Car: 1989 Iroc-Z
Engine: 5.7L TPI
Transmission: 700R4
Originally posted by 89IROCZTPI
you are the MAN my friend!!! Once again you come through Now how can I just get my hands on one of the handy books you have? Thanks again!!
Well you can either go through Helm Inc. and pay $146.00 or take the cheaper route and go on E-bay and bid on one there. One just went yesterday for $46.00 plus shipping. I think there are about 2 or 3 more on there right now.
Reply
Old Sep 1, 2004 | 10:29 PM
  #10  
89IROCZTPI's Avatar
Thread Starter
Member
iTrader: (1)
 
Joined: Oct 2003
Posts: 288
Likes: 0
From: South Carolina
Car: 1989 IROCZ
Engine: Rebuilt 350 TPI
Transmission: 700r4
sounds like a 46 bucks well spent if ya ask me, thanks for the heads up, think ill head over there now
Reply
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
Mark_ZZ3
TPI
15
May 24, 2018 01:02 PM
BumpaD82
Tech / General Engine
37
Feb 26, 2016 02:57 PM
bjpotter
History / Originality
17
Oct 4, 2015 07:48 PM
racereese
Tech / General Engine
14
Oct 3, 2015 03:46 PM




All times are GMT -5. The time now is 06:51 AM.