Oldsmobile When starting new posts, please specify YEAR, MAKE, MODEL, ENGINE type, and whatever modifications you have made.

Slight Miss at Idle w/ Full Shuddder at 70MPH

Thread Tools
 
Search this Thread
 
Old 03-29-2011, 01:42 PM
  #1  
Junior Member
Thread Starter
 
ReneGoFast's Avatar
 
Join Date: Mar 2010
Location: Grand Rapids home of Jerry Ford
Posts: 9
Likes: 0
Received 0 Likes on 0 Posts
ReneGoFast is on a distinguished road
Default Slight Miss at Idle w/ Full Shuddder at 70MPH

HEy Ya'll !! I've a real quick question or two for the Forum. I'm reading the "How to" section that "Danthers" has so kindly posted, along with others. I've checked my coil packs and they are with in the recommended range on the Primary and Secondary sides, I just installed new AC Spark plugs ( same as what was there ) and new plug wires. and it runs a little better the it did b-4.but still misses. Just for my own curiosity
I "Ohmed" out the Old Plug wires and got the following results: #1-1.65,
#2- 3.13, #3-3.52, #4 & #5 -2.88 #6-2.67 In trying to get the "miss" to go away I removed the NEW plug wires one at a time and re-installed the old wires, the NEW plug wires Ohmed out as: #1- 4.20, #2-6.76 #3-6.98 #4-9.78, #5 8.85 #6 10.08 IF these reading are correct It looks to me like the"NEW" plug wires have TWICE the resistance than the "old" plug wires? ??I left the old wired installed as it did not run any better with the new ones.( I'm gonna get my $29 back from AZ )
The CEL has not been set, it lights up upon starting and then goes out.ANyway it'* the OBD-1.5 that no one can scan. The engine has a slight miss at idle, hesitation at starting from a full stop, pulls strongly during acceleration and them starts to stutter at 70MPH cruising speed. The miss seems to go away during acceleration.
This is the same vehicle that i posted a while back that the the power steering went out on. SO, I'm building my upper body strength up steering the thing while trying to figure out why she'* not running smooth. and this is what I've done so far: Removed and cleaned the EGR, New plugs, Old wires, Double checked to make sure no plug wire contact near O2 sensor, Cleaned Coil PAKs and Wire connection to ECM. Let me know what you think about those plug wire ohm readings and point me in the correct direction to find and cure this miss. ThankS! !
Old 03-29-2011, 03:54 PM
  #2  
Senior Member
True Car Nut
 
jwfirebird's Avatar
 
Join Date: Dec 2009
Location: western,ny state
Posts: 9,616
Received 579 Likes on 497 Posts
jwfirebird has a reputation beyond reputejwfirebird has a reputation beyond reputejwfirebird has a reputation beyond reputejwfirebird has a reputation beyond reputejwfirebird has a reputation beyond reputejwfirebird has a reputation beyond reputejwfirebird has a reputation beyond reputejwfirebird has a reputation beyond reputejwfirebird has a reputation beyond reputejwfirebird has a reputation beyond reputejwfirebird has a reputation beyond repute
Default

az wires are not that good for one, so you cant rule out wires, also the rubber breaks down and allows arcing to what ever metal might be the easiest path to ground so internal resistance is not the only important check.
Old 05-10-2011, 04:17 PM
  #3  
Junior Member
Thread Starter
 
ReneGoFast's Avatar
 
Join Date: Mar 2010
Location: Grand Rapids home of Jerry Ford
Posts: 9
Likes: 0
Received 0 Likes on 0 Posts
ReneGoFast is on a distinguished road
Default Update 5/10

I found that I can stop the "stuttering" while driving by slightly depressing the brake pedal. I thinks I'm disconnecting the Torque converter lock-up by doing this, So I'm assuming the problem is in the transmission. I replaced the Power steering pump and now have power steering again. SO I'll continue to search for the cure to the miss and find out how to fix the torque converter stuttering.
Old 05-10-2011, 08:37 PM
  #4  
Retired Senior Admin

Expert Gearhead
 
Danthurs's Avatar
 
Join Date: May 2006
Location: Sheboygan Wisconsin
Posts: 29,661
Likes: 0
Received 28 Likes on 24 Posts
Danthurs is a name known to allDanthurs is a name known to allDanthurs is a name known to allDanthurs is a name known to allDanthurs is a name known to allDanthurs is a name known to all
Default

By pressing the brake your unlocking the torque converter. Have you checked your coils to see if you have a bad one. have you had the car scanned to see if any codes come up. Some trans codes don't trip a light.
Old 05-11-2011, 12:46 AM
  #5  
Senior Member
Certified GM nut
 
SignOfZeta's Avatar
 
Join Date: Mar 2005
Location: New Milford, CT
Posts: 2,284
Received 17 Likes on 14 Posts
SignOfZeta has a spectacular aura aboutSignOfZeta has a spectacular aura about
Default

I'll recommend changing the transmission fluid and filter. That'* all mine needed to start behaving again. If you haven't changed it in the last 30,000 miles, now'* the time.

With your other issues, it may not just be the tranny fluid, but if you're due for a change, drop the pan and change it and rule that out.
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
hvactech
2000-2005
3
02-11-2006 01:02 AM
mike_peperni
Your Other Rides: Pics & Videos
3
01-08-2006 12:01 PM
Scrangler83
1987-1991
14
04-04-2005 03:28 AM
sseboy
1992-1999
2
03-17-2005 11:09 PM
Wolfedog50
1992-1999
6
12-25-2003 10:25 AM



Quick Reply: Slight Miss at Idle w/ Full Shuddder at 70MPH



All times are GMT -4. The time now is 07:04 PM.