hesitates when hot - 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 07-17-2008, 02:56 PM   #1
Junior Member
Thread Starter
 
Join Date: Jul 2008
Posts: 2
Thanks: 0
Thanked 0 Times in 0 Posts
my95olds is on a distinguished road
Default hesitates when hot

Hi,

I have a 95 olds 88, 3.8. 89998 miles.

When the temperature outside is hot, say over 97 degrees my car will
lose power on the highway and start to hesitate sharply. It drives fine for about 9 miles then starts to hesitate and gets worse.

Recent tune up, plugs, GM wires, fuel filter.

Could it be the fuel pump?

It runs fine when the temps are cooler.

Any ideas?
my95olds is offline   Reply With Quote
Old 07-17-2008, 03:01 PM   #2
DINOSAURUS BOOSTUS

Expert Gearhead
 
BillBoost37's Avatar
 
Join Date: Mar 2005
Location: Enfield, CT
Posts: 41,391
Thanks: 0
Thanked 0 Times in 0 Posts
BillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of light
Default

Fuel pressure is definately one of the items to be checked. Check it cold with cool weather adn check it hot with hot weather and compare the differences. Another thing to consider is it appears to be happening under load. The pump may not be keeping up with demand.

There are other things like a TB cleaning etc that might help.
BillBoost37 is offline   Reply With Quote
Old 07-18-2008, 01:22 PM   #3
Senior Member
Posts like a 4 Banger
 
Join Date: Mar 2007
Location: Austin Texas
Posts: 111
Thanks: 0
Thanked 1 Time in 1 Post
57lxi is on a distinguished road
Angry

Whats your temp gauge reading when things start to go south? Is the coolant level droping? Check you new plugs to see if you have any that are real white, you condition sounds like mine before the UIM gave it up. Could be a fuel issue also as mentioned. At 89k, fuel pump could be getting tired.

Whatever you do, don't do what I did and wait to fix stuff. I ended up having to have a fuel pump and a UIM replaced while on a road trip, at the dealer. Needless to say, it cost a BUNCH more to have them do it than what I could have done it for in my driveway.
57lxi is offline   Reply With Quote
Old 07-18-2008, 03:52 PM   #4
Junior Member
Thread Starter
 
Join Date: Jul 2008
Posts: 2
Thanks: 0
Thanked 0 Times in 0 Posts
my95olds is on a distinguished road
Default hesitates when hot

The temp gauge doesn't move either direction.

I have noticed that at idle there is not much exhaust coming out of the tail pipe.

But I have not smelled the rotten egg smell of a bad cat or observed it getting red hot.

My mileage is really bad. 3/4 of a tank got me 300 miles.

It doesn't buck every day. But it loses power at any speed above light throttle.

Also, when under a load, my a/c will go from vents to floor. When the load is lessened it comes back to vents.
my95olds is offline   Reply With Quote
Old 07-18-2008, 04:50 PM   #5
Senior Member
Certified Car Nut
 
Join Date: Oct 2003
Posts: 19,756
Thanks: 0
Thanked 0 Times in 0 Posts
1993 SLE is on a distinguished road
Default

that sounds like a Vac problem
1993 SLE is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
95 olds 88 hesitates/stalls when hot GEARHEAD Oldsmobile 4 05-11-2011 04:11 PM
Car hesitates in hot weather vektron1961 1992-1999 16 04-12-2011 12:49 PM
hot hot hot jhill52788 1992-1999 2 07-07-2007 06:18 PM
HOT HOT HOT! BonneMeMN Lounge 22 06-25-2005 12:46 AM
Feelin Hot Hot Hot LittleHoov General GM Chat 10 08-07-2003 01:41 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 08:12 AM.


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.