Engine miss - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


1992-1999 Series I L27 (1992-1994 SE,SLE, SSE) & Series II L36 (1995-1999 SE, SSE, SLE) and common problems for the Series I and II L67 (all supercharged models 92-99) Including Olds 88's, Olds LSS's and Buick Lesabres Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

Reply
 
 
 
Thread Tools Search this Thread
Old 12-23-2003, 02:07 PM   #1
Senior Member
Posts like a Northstar
Thread Starter
 
Join Date: Apr 2003
Location: Windsor
Posts: 510
Thanks: 0
Thanked 0 Times in 0 Posts
Red Baron is on a distinguished road
Default Engine miss

This is weird. I'm getting this what feels like a miss at cruising speed, it is noticable when the torque converter locks up. I'm not sure what it feels like when the engine misses but think this may be it. It feels like a light stumble, is that miss firing? I'm not getting any codes at all. Could be time for new plugs? wires look fine, the plugs are ngk iridium about 15000 old. How bout a loose belt could that cause any drivabilty issues?
I think its a bit loose. On the tensioner it looks like this...
i
I I I I
Im not sure if that makes any cents but the bottom lines are the marks on the tensioner and the i up top is the arrow pointing to the tensioner, moving the tensioner causes the arrow to change where it points.

I will go get new plugs and an o2 sensor to see if that helps any. I'm just not sure if the belt being loose is affecting anything.
Red Baron is offline   Reply With Quote
Old 12-23-2003, 02:13 PM   #2
Junior Member
Posts like a Ricer Type-R
 
Join Date: Aug 2002
Posts: 10
Thanks: 0
Thanked 0 Times in 0 Posts
willwren is on a distinguished road
Default

Belt slip would be more obvious at WOT. Get an oversized ZZP idler to solve the tension position.

Does it do this when the car is cold, warm or always? Have you tried the coil pack troubleshooting in Techinfo? Also consider checking your TPS. A dead spot won't always throw a code or light. If the cruise is engaged during the 'miss' does it disengage?
willwren is offline   Reply With Quote
Old 12-23-2003, 02:25 PM   #3
Senior Member
Posts like a Northstar
Thread Starter
 
Join Date: Apr 2003
Location: Windsor
Posts: 510
Thanks: 0
Thanked 0 Times in 0 Posts
Red Baron is on a distinguished road
Default

it always does it when ever the rpms are low but not accerating only when cruising at low rpm'* and only when the torque converter locks up. haven't check out the coil troubleshooting but i will right now
Red Baron is offline   Reply With Quote
Old 12-23-2003, 02:28 PM   #4
Senior Member
Posts like a Northstar
Thread Starter
 
Join Date: Apr 2003
Location: Windsor
Posts: 510
Thanks: 0
Thanked 0 Times in 0 Posts
Red Baron is on a distinguished road
Default

Really super dumb question but what is the tool called to check the coilpacks. I think I know what tool it is but I cant think of the name for it
Red Baron is offline   Reply With Quote
Old 12-23-2003, 02:55 PM   #5
Junior Member
Posts like a Ricer Type-R
 
Join Date: Aug 2002
Posts: 10
Thanks: 0
Thanked 0 Times in 0 Posts
willwren is on a distinguished road
Default

Ohmmeter. DVM (digital volt meter). Any of them will check resistance. TPS the same.
willwren is offline   Reply With Quote
Old 12-23-2003, 06:12 PM   #6
Senior Member
Posts like a Northstar
Thread Starter
 
Join Date: Apr 2003
Location: Windsor
Posts: 510
Thanks: 0
Thanked 0 Times in 0 Posts
Red Baron is on a distinguished road
Default

Do you know what read out i should get for the tps on the ohm meter? i havent tested the coils yet but i am tonight as well as replacing the plugs and o2.
Red Baron is offline   Reply With Quote
Old 12-23-2003, 06:24 PM   #7
Senior Member
True Car Nut
 
Join Date: Dec 2002
Location: Sauk Centre, MN
Posts: 5,458
Thanks: 0
Thanked 0 Times in 0 Posts
OLBlueEyesBonne is on a distinguished road
Default

Hey Red Baron,
Have the exact same problem -only when it'* in OD lock-up. It'* like there isn't enough fuel being fed and especially on hills (even the slightest incline) it refuses to hold speed and the speed drops, even when I keep hitting accel, and only after reaches the peak of the hill will it regain the speed.
I don't really have any money to buy parts for troubleshooting, but I am hpping to do some troubleshooting and if I find anything out I'll be sure to keep you guys informed on my findings.
Martin
OLBlueEyesBonne is offline   Reply With Quote
Old 12-23-2003, 09:39 PM   #8
Junior Member
Posts like a Ricer Type-R
 
Join Date: Aug 2002
Posts: 10
Thanks: 0
Thanked 0 Times in 0 Posts
willwren is on a distinguished road
Default

Blue, I expect yours would be ignition also. It'* more obvious when the TC locks up and the engine drops to a lower RPM. Your alternator is also putting out less at that RPM, which can compound the problem.

Baron....the TPS readings were posted here within the last 2 weeks. I'm on the way out the door......if you can't find them, PM me.
willwren is offline   Reply With Quote
Old 12-24-2003, 04:19 AM   #9
Senior Member
Posts like a Northstar
Thread Starter
 
Join Date: Apr 2003
Location: Windsor
Posts: 510
Thanks: 0
Thanked 0 Times in 0 Posts
Red Baron is on a distinguished road
Default

I tested the coil packs and they were good.

I guess it could have be one of three things.

-Plugs. I took out the NGK TR55 IX only 15000kms on them. This is the second time I'v taken them out since I got them and both times the gap increased 1 thou. I installed TR55'* this time they are one heat range colder.

-O2 sensor. The one that was on the car was a bosch installed when I got the car, replaced with an AC Delco.

-Throttle body. Man was that thing gross, I took it off and removed the sensors before cleaning. I used a can of TB cleaner some brake cleaner and an old tooth brush. It came out looking almost new. Its weird I clean the throttle body on the car every oil change and with it off looks like it has never been cleaned.

What ever it was that fixed the stumble I'm just glad its good. The car also runs better than it has ever ran since I'v owned it, the throttle response is a million times better and it is smoooooth as hell.
Red Baron is offline   Reply With Quote
Old 12-24-2003, 05:10 AM   #10
Junior Member
Posts like a Ricer Type-R
 
Join Date: Aug 2002
Posts: 10
Thanks: 0
Thanked 0 Times in 0 Posts
willwren is on a distinguished road
Default

Two thoughts.....your throttle response gain was due to thoroghly cleaning the TB. I know that from experience.

And.......

With that pulley and intake combination, you'll probably still have plug problems until you drop ANOTHER heat range colder to the TR6. I just did that 2 weeks ago.
willwren is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
Engine miss, check engine light on - NO code mdrose64 1992-1999 12 07-16-2007 12:43 PM
Check engine light, and slight miss Wolfedog50 1992-1999 6 12-25-2003 11:25 AM
Engine Miss Solved :D Tamara 1992-1999 2 08-20-2002 09:45 PM
Found My Exhaust Leak & Engine Miss! DeathRat 1992-1999 8 07-31-2002 10:21 PM
Engine miss! DeathRat 1992-1999 12 07-26-2002 01:22 AM


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



All times are GMT -4. The time now is 06:16 PM.


We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.