Engine miss between 3-4k rpm, '94 Olds 88 LSS... - 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 02-12-2005, 03:21 PM   #1
Senior Member
True Car Nut
Thread Starter
 
Join Date: May 2003
Location: Holt, MI & Lima, OH
Posts: 3,022
Thanks: 0
Thanked 0 Times in 0 Posts
dbtk2 is on a distinguished road
Default Engine miss between 3-4k rpm, '94 Olds 88 LSS...

My sisters fiance has a Caravan (like a '92 ish) and I guess something in the engine broke so now he'* looking for a new car. He found a '94 Olds 88 LSS at a local dealer. Its a clean car, 87k miles, 1 owner, leather, all the toys... Anyways, he brought it over to have my dad and I look at it and it seems like a flawless car, however the only problem we really saw was that it has a miss between 3-4k rpms. Below and above those rpms it runs smooth and pulls hard. It just seems like its coils or plugs to me. Just making sure thats what others think.

Opinions?

Thanks,

Shawn
dbtk2 is offline   Reply With Quote
Old 02-12-2005, 03:23 PM   #2
Senior Member
True Car Nut
 
Join Date: Sep 2004
Location: Farmington, Minnesota =MWBF '05 SURVIVOR= =CEBF '06 SURVIVOR= =August '06 COTM=
Posts: 9,130
Thanks: 0
Thanked 0 Times in 0 Posts
LakevilleSSEi is on a distinguished road
Default

Any possibility of early signs of a cam/crank sensor going out?
LakevilleSSEi is offline   Reply With Quote
Old 02-12-2005, 03:28 PM   #3
Senior Member
True Car Nut
Thread Starter
 
Join Date: May 2003
Location: Holt, MI & Lima, OH
Posts: 3,022
Thanks: 0
Thanked 0 Times in 0 Posts
dbtk2 is on a distinguished road
Default

Not that I noticed. It had no codes. I guess its a possibility, but it didn't seem like thats what it was.
dbtk2 is offline   Reply With Quote
Old 02-12-2005, 03:30 PM   #4
Senior Member
True Car Nut
 
Join Date: Sep 2004
Location: Farmington, Minnesota =MWBF '05 SURVIVOR= =CEBF '06 SURVIVOR= =August '06 COTM=
Posts: 9,130
Thanks: 0
Thanked 0 Times in 0 Posts
LakevilleSSEi is on a distinguished road
Default

Hmm.....When was the fuel filter replaced? Sometimes a bad fuel filter can cause a miss. Had it happen in a work truck once
LakevilleSSEi is offline   Reply With Quote
Old 02-13-2005, 03:57 AM   #5
Senior Member
True Car Nut
 
Join Date: Jul 2004
Location: Twin Falls, Idaho
Posts: 7,545
Thanks: 0
Thanked 1 Time in 1 Post
Hans is on a distinguished road
Default

my 94 eighty eight has run perfect, and I really do mean perfect for the price range it was in (1/2 cost of comparable bonnie SE models). The only thing in the engine bay I have replaced is the oil filter, air filter, and plugs. This car had NOT RUN for 4 years or so, charged the battery and off it went.

I get a minor hesitation at 1000-1400 rpmish, only problem I can tell. My grandma has a 94 88 lss (*dont laugh lol) purchased new, she has never had a repair of any kind in 70K or so, never needed any on-warranty work either and she drives quite aggressive for someone over 50 (no offense, lol) No parts ever needed other than oil changes and when she lost her key. The car was also stolen for 6 months, then recovered with no mechanical damage what so ever.

Sounds like coil/icm/ignition or possible sensor/emisions problem though. Should not be too bad to figure out.

The L27s are quite solid engines. and really easy to work on compared to most, at least on the top side.

keep in mind the hybrid pcm thing
Hans is offline   Reply With Quote
Old 02-13-2005, 04:13 AM   #6
Senior Member
True Car Nut
 
Join Date: Nov 2002
Location: Texarkana, Texas
Posts: 6,041
Thanks: 0
Thanked 0 Times in 0 Posts
Damemorder is on a distinguished road
Default

Sounds like a weak coil/icm. Try swapping in a known good, I'm sure you could hear the difference.
Damemorder is offline   Reply With Quote
Old 02-13-2005, 05:35 AM   #7
PopaDopaDo
True Car Nut
 
popatim's Avatar
 
Join Date: Jan 2005
Location: NY
Posts: 4,957
Thanks: 0
Thanked 0 Times in 0 Posts
popatim is on a distinguished road
Default

flat spot on the throttle position sensor perhaps?
popatim is offline   Reply With Quote
Old 02-13-2005, 11:05 AM   #8
Senior Member
True Car Nut
Thread Starter
 
Join Date: May 2003
Location: Holt, MI & Lima, OH
Posts: 3,022
Thanks: 0
Thanked 0 Times in 0 Posts
dbtk2 is on a distinguished road
Default

Quote:
Originally Posted by Damemorder
Sounds like a weak coil/icm. Try swapping in a known good, I'm sure you could hear the difference.
Thats what I'm thinking. I am going to throw on some extra coils we have lying around to see if it fixes the problem.

Shawn
dbtk2 is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
civic jumping in rpm's between shifts eltatertoto Lounge 8 10-06-2011 08:32 AM
Misfire (P0306) on a '98 Olds LSS with L36 engine (fixed) ScottyB Oldsmobile 17 09-07-2011 05:18 PM
2000 SSEi Hesitation between 2500 and 3000 rpm's michael69 Pontiac 8 03-07-2011 09:54 AM
Help my tach stays between 4000 and 4500 rpm all the time! suctoes 1992-1999 3 11-12-2005 10:05 PM
High rpm miss willwren 1992-1999 30 08-21-2003 06:17 PM


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 09:00 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.