LT1/LT4 Tech 1993-1997

need help

Thread Tools
 
Search this Thread
 
Old Oct 6, 2021 | 01:48 PM
  #1  
oldnintyseven's Avatar
Thread Starter
|
Newbie
Joined: Oct 2021
Posts: 2
Default need help

my 95 lt1 camaro has a bad stumble/misfire at low throttle positions such as driving on highway. The engine clears up if I give it more throttle. I ran two scans last week. Can anyone look at them and see if there are any clues?
 
Attached Files
File Type: csv
test drive 1.csv (287.7 KB, 48 views)
File Type: csv
test drive 2.csv (212.4 KB, 31 views)
Old Oct 7, 2021 | 12:08 PM
  #2  
craby's Avatar
April 2011 ROTM
Joined: Mar 2009
Posts: 22,001
From: Tokeland, Washington
ROTM Winner's Club
Default

have you tested fuel pressure yet? also pull plugs and 02 sensors to see if they is all black an fouled.
 
Old Oct 7, 2021 | 12:18 PM
  #3  
Gorn's Avatar
Fourth Generation Moderator
October 2009 ROTM
iTrader: (1)
Joined: Nov 2007
Posts: 10,560
From: Eastern PA,
ROTM Winner's Club
Default

I assume there was no codes? The O2’s look funny but that could be caused by an ignition miss or injector problem or even a vacuum leak next I would put it on an oscilloscope. A good scan tool can count cylinder misses. but even that has it limits because it will not show a fueling issue or vacuum leak.

How old is the Opti?
 
Old Oct 7, 2021 | 03:16 PM
  #4  
oldnintyseven's Avatar
Thread Starter
|
Newbie
Joined: Oct 2021
Posts: 2
Default

Not sure age of opti I put new regulator pump and injectors it was flooding before that I got new plugs and wires I will install them tomorrow
 
Old Oct 8, 2021 | 12:04 PM
  #5  
Gorn's Avatar
Fourth Generation Moderator
October 2009 ROTM
iTrader: (1)
Joined: Nov 2007
Posts: 10,560
From: Eastern PA,
ROTM Winner's Club
Default

Well if you had flooding issues there is a good chance your O2s are contaminate and will need replaced. We are just talking about the 2 O2s closest to the heads.
 
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
B_Dubya
82-92 Projects
1
Sep 23, 2014 11:01 AM
VALHAR
LT1/LT4 Tech
5
Sep 10, 2013 10:20 AM
red star
LT1/LT4 Tech
3
May 8, 2009 07:42 AM
dorn4ever
93-02 General
13
May 23, 2008 12:28 AM
blcp86
LT1/LT4 Tech
4
Jun 30, 2006 09:11 PM




All times are GMT -5. The time now is 02:31 AM.