PCM Diagnostics & Tuning HP Tuners | Holley | Diablo

ODBII on but not reading

Thread Tools
 
Search this Thread
 
Old Jul 2, 2007 | 08:20 PM
  #1  
nbm00ss's Avatar
Thread Starter
Staging Lane
iTrader: (9)
 
Joined: Jun 2007
Posts: 50
Likes: 0
From: Tampa, Fl
Default ODBII on but not reading

I did a heads/cam swap on my 00 SS and when i went to turn the car on it would turn over but not start and the fuel pump would not turn on. i plugged in a code reader and it started right up. the biggest problem is that i cannot have the car tuned because when you plug into it it will not communicate with whatever is plugged into it. but it will communicate with the code reader. I believe that it is communicating with everything but the pcm. anyone have this problem?
Reply
Old Jul 3, 2007 | 09:25 AM
  #2  
LS1-450's Avatar
TECH Junkie
iTrader: (33)
 
Joined: Aug 2005
Posts: 3,783
Likes: 9
Default

Missing ground on the back of the passenger side head. There should be three ground wires connected back there. It's the passenger side on a 98 & may be different on an 00. Never the less, check the grounds.
Reply
Old Jul 3, 2007 | 06:09 PM
  #3  
nbm00ss's Avatar
Thread Starter
Staging Lane
iTrader: (9)
 
Joined: Jun 2007
Posts: 50
Likes: 0
From: Tampa, Fl
Default

you have this problem before? i put the grounds back on but maybe they werent in the right place. i wouldnt think it should matter where its mounted as long as it gets a ground.
Reply
Old Jul 3, 2007 | 09:23 PM
  #4  
98ls1blackbird's Avatar
Staging Lane
iTrader: (5)
 
Joined: Dec 2005
Posts: 60
Likes: 0
From: Jenison, Mi
Default

Try checking the fuse for the cigarette lighter. Also powers the OBDII.
Reply
Old Jul 4, 2007 | 09:23 AM
  #5  
nbm00ss's Avatar
Thread Starter
Staging Lane
iTrader: (9)
 
Joined: Jun 2007
Posts: 50
Likes: 0
From: Tampa, Fl
Default

Yeah thats the thing. i have checked every fuse and they are all fine. i even put a bigger fuse in the cig. i had a friend of mine that works at the dealership here look at it and he was clueless and couldnt get his gm code reader to work on it. he traced wires for well over an hour and no luck.
Reply
Old Jul 7, 2007 | 05:10 PM
  #6  
nbm00ss's Avatar
Thread Starter
Staging Lane
iTrader: (9)
 
Joined: Jun 2007
Posts: 50
Likes: 0
From: Tampa, Fl
Default

-ttt-
Reply
Old Jul 10, 2007 | 08:35 PM
  #7  
nbm00ss's Avatar
Thread Starter
Staging Lane
iTrader: (9)
 
Joined: Jun 2007
Posts: 50
Likes: 0
From: Tampa, Fl
Default

ttt..
Reply
Old Jul 12, 2007 | 05:56 PM
  #8  
A-EZ's Avatar
Teching In
 
Joined: Nov 2005
Posts: 45
Likes: 0
From: APEX, NC
Default

oh no..........having the same type of problem............had a SES light on b/c of the cats, gm dealer replaced them with postive results, then when i went to get it inspected it failed because no comms could be established with the computer.....any ideas???? Cig lighter is working and fuses are all good. I am going to take it back the the dealer to ask. thanks
Reply
LS1 Tech Stories

The Best V8 Stories One Small Block at Time

story-0

Topdon ONE vs. Artidiag 800 BT2: Which is the Diagnostic Tablet For You?

 Pouria Savadkouei
story-1

Gas Monkey Built a 6-Wheel Ferrari Testarossa With a Corvette LT4 Engine

 Verdad Gallardo
story-2

7 Most Reliable High-Performance Engines GM Has Ever Built

 Verdad Gallardo
story-3

Amazing '71 Camaro Restomod Is Modern Muscle Car Under the Skin

 Verdad Gallardo
story-4

6 Common C5 Corvette Failures and What's Involved In Repairing Them

 Pouria Savadkouei
story-5

Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph

 Verdad Gallardo
story-6

Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked

 Pouria Savadkouei
story-7

Top 10 Most Powerful Chevy Trucks Ever Made!

 
story-8

Hennessey's New Supercharged Silverado ZR2 Has 700 HP

 Verdad Gallardo
story-9

Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes

 Verdad Gallardo
Old Jul 12, 2007 | 09:47 PM
  #9  
nbm00ss's Avatar
Thread Starter
Staging Lane
iTrader: (9)
 
Joined: Jun 2007
Posts: 50
Likes: 0
From: Tampa, Fl
Default

yeah man im re-assembling everything because i did an engine change. ive checked everything but i still have a gut feeling its not gonna work. let me know what the dealer finds out. my friend from the dealership is coming back sunday to check it out some more if its not fixed.
Reply
Old Jul 19, 2007 | 03:19 PM
  #10  
nbm00ss's Avatar
Thread Starter
Staging Lane
iTrader: (9)
 
Joined: Jun 2007
Posts: 50
Likes: 0
From: Tampa, Fl
Default

well this is another one of those things ill never figure out because re-install is finished and everything is fine. i cant figure out why but i really dont care now because it works. thanks for the advice guys.
Reply




All times are GMT -5. The time now is 08:05 PM.

story-0
Topdon ONE vs. Artidiag 800 BT2: Which is the Diagnostic Tablet For You?

Slideshow: We take a close look at the ONE and Artidiag 800BT2 diagnostic tools from Topdon and the reasons to buy one over the other.

By Pouria Savadkouei | 2026-05-28 11:05:11


VIEW MORE
story-1
Gas Monkey Built a 6-Wheel Ferrari Testarossa With a Corvette LT4 Engine

Slideshow: The controversial Ferrari F6 swaps its original flat-12 for a Corvette Z06-derived LT4 V8 and sends power to four rear wheels through a custom-built drivetrain.

By Verdad Gallardo | 2026-05-26 18:23:54


VIEW MORE
story-2
7 Most Reliable High-Performance Engines GM Has Ever Built

Slideshow:These GM engines didn't just make huge power, they survived abuse, boost, track days, and six-digit mileage with a reputation for refusing to quit.

By Verdad Gallardo | 2026-05-21 16:45:27


VIEW MORE
story-3
Amazing '71 Camaro Restomod Is Modern Muscle Car Under the Skin

Slideshow: This heavily modified 1971 Camaro mixes classic muscle car styling with a fifth-generation Camaro interior and modern LS3 power.

By Verdad Gallardo | 2026-05-12 18:06:42


VIEW MORE
story-4
6 Common C5 Corvette Failures and What's Involved In Repairing Them

Slideshow: From wobbling harmonic balancers to failed EBCMs, these are the issues that define long-term C5 ownership and what repairs typically involve.

By Pouria Savadkouei | 2026-05-07 18:44:57


VIEW MORE
story-5
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph

Slideshow: A modern Camaro transformed into a retro icon, this limited-run "Bandit" build blends nostalgia with brute force in a way few revivals manage.

By Verdad Gallardo | 2026-04-21 13:57:02


VIEW MORE
story-6
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked

Slideshow: Cadillac didn't just crash the high-performance luxury vehicle party, it showed up loud, supercharged, and occasionally a little unhinged...

By Pouria Savadkouei | 2026-04-16 10:05:15


VIEW MORE
story-7
Top 10 Most Powerful Chevy Trucks Ever Made!

Slideshow: Top ten most powerful Chevy trucks ever made

By | 2026-03-25 09:22:26


VIEW MORE
story-8
Hennessey's New Supercharged Silverado ZR2 Has 700 HP

Slideshow: Hennessey has turned the Silverado ZR2 into a 700-hp off-road monster with supercharged V8 power and a limited production run.

By Verdad Gallardo | 2026-03-24 18:57:52


VIEW MORE
story-9
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes

Slideshow: A one-off sports car that looks like a vintage Italian exotic-but hides a C6 Corvette underneath-just sold for the price of a new mid-engine Corvette.

By Verdad Gallardo | 2026-03-23 18:53:41


VIEW MORE