Engine performance worsens as temperature increases

Reply

  #1  
Old 07-05-17, 11:49 PM
Member
Thread Starter
Join Date: Jun 2015
Location: USA
Posts: 30
Engine performance worsens as temperature increases

The car in question is a 95 Camry Wagon. For a long time now, a smooth curb idle has been an issue. The other day, I drove to work without issue.

As I drove home, 12 hours later, starting the car initially was okay, but then as I continued to drive, the engine began to bog/lag, unable to accelerate beyond 45 MPH. Continuing to drive, only worsened the problem. As I arrived home, the engine was struggling to sustain a curb idle. As I began backing up the car, the engine died. Attempts to restart the engine failed. I let the car sit for 2 hours & tried again; this time it started, but with a substantially rougher curb idle. I turned off the engine & let the car sit overnight (approximately 10 hours).

When I attempted to start the engine, it ran with a smoother idle, but worsened, the longer the car warmed up at curb idle. Attempts to drive the car, didn't allow acceleration past 45 MPH & produced what sounded like a rush of air, only when attempting acceleration. At curb idle, the rush of air sound was more audible when pumping the gas pedal with the hood closed than with it open.

Any insight to this, what-seems-to-be, temperature related issue?
 
Sponsored Links
  #2  
Old 07-06-17, 02:53 AM
Member
Join Date: Aug 2015
Location: USA
Posts: 218
is the check engine light on?
would probably check the air intake hose for cracks for a starting point if it has an airflow sensor and you get a hole or crack in the intake hose it will run bad and could be part of the noise your hearing.
otherwise typical problems that cause bogging and wont accelerate over 45 mph is usually either caused by losing fuel pressure/bad fuel pump or exhaust restriction/plugged convertor.
 
  #3  
Old 07-06-17, 04:58 AM
pugsl's Avatar
Forum Topic Moderator
Join Date: Mar 2008
Location: Raleigh, NC
Posts: 7,631
First I would get car scanned, Usually autozone will read them for free. After you get codes you will have a starting point.
 
  #4  
Old 07-06-17, 07:28 AM
the_tow_guy's Avatar
Group Moderator
Join Date: Feb 2001
Location: SW Fla USA
Posts: 11,513
Unfortunately, if the scan comes up clear, you will likely need professional help. The laundry list of possible fixes would be pretty long and trying them one at a time could get expensive.

The temperature/performance relationship I'm guessing is because when cold the computer will be calling for more fuel (rich).

How is the general upkeep of vehicle? Kept up on routine maintenance items?
 
  #5  
Old 07-06-17, 07:47 AM
Member
Thread Starter
Join Date: Jun 2015
Location: USA
Posts: 30
For as long as I've had this car, the check engine light has never come on, although when starting the car, the check engine light does a self-diagnostic & illuminates & then turns off. By this, I assume it's functional, but just hasn't illuminated to point out a problem. Thanks for your advice; at least it gives me a starting point.
 
  #6  
Old 07-06-17, 08:00 AM
Member
Thread Starter
Join Date: Jun 2015
Location: USA
Posts: 30
The upkeep of the vehicle is regular. After all, it's a 95 & still running, very well as a matter of fact, until this very recent occurrence. The sudden onset leads me to believe that the problem is perhaps sensor-related or tied into some electrical sensing device.

Is it possible for a code to be thrown, but the check engine function not record it, regardless of the self-diagnostic, check engine light test performed when starting the car?
 
  #7  
Old 07-06-17, 08:06 AM
Member
Thread Starter
Join Date: Jun 2015
Location: USA
Posts: 30
Autozone diagnoses check engine lights using the ODB-2 standard. The 95 Camry falls into the ODB-1 standard range. Short of taking the vehicle for professional diagnostics, are there any other options? I've seen an Internet video using a paper clip jumper & then reading check engine light blinks as a type Morse Code to determine a problem, if any, but I'd rather opt for a more accurate approach.
 
  #8  
Old 07-06-17, 08:41 AM
Member
Join Date: Aug 2015
Location: USA
Posts: 218
some 95 models was obd2 even though it wasn't required till 96 you would need to look for an obd2 connector under the dash.
no check engine light there is a good chance it wont have any codes but its possible a code could be stored, but really your probably going to need to see a shop where they could check fuel pressure, the exhaust and possibly check codes also even though it may not tell them anything.
checking the air intake hose for cracks is about the only thing that would be easy to check on it.
 
  #9  
Old 07-06-17, 03:32 PM
Member
Join Date: Jun 2005
Location: United States
Posts: 327
I also own 95 Camry Wagon from new. My car use OBD II and the connector is behind coin box at driver side. You need to take off coin box to see OBD II connector.
 
  #10  
Old 07-06-17, 05:42 PM
Member
Thread Starter
Join Date: Jun 2015
Location: USA
Posts: 30
Mine is also a Wagon. Behind my pull-down coin box is a fuse box & behind the fuse box is a blue-colored relay. Does your Wagon have a port labeled "Diagnostics" under the hood behind the strut tower, passenger side?
 
  #11  
Old 07-06-17, 05:48 PM
Member
Thread Starter
Join Date: Jun 2015
Location: USA
Posts: 30
Under the hood, behind the strut tower, passenger side, is a port labeled "Diagnostics". Knowing that, would a car have both OBD1 as well as OBD2 ports?
 
  #12  
Old 07-06-17, 06:35 PM
Rough Rooster's Avatar
Member
Join Date: Feb 2014
Location: USA
Posts: 380
I would be checking temperature sensors that feed information to computer.
You are describing a computer in "limp Home" mode because of sensor failure. The computer relies on sensors and especially temperature one to let computer take over control of engine functions. If the temp sensor doesn't do that then the computer goes into "limp home" mode and allows car to be driven, but no performance.
The computer operates in "open loop" until engine warms. It then switches to "closed loop" where all the sensors contribute their data to computer and it adjusts parameters for best performance.
Look for a dealer or an Independent that displays ASE Certified signage. They have demonstrated their expertise at auto repairs.

RR
 
  #13  
Old 07-07-17, 02:17 AM
Member
Join Date: Aug 2015
Location: USA
Posts: 218
should be able to check codes with a simple jumper wire on pre obd2 models you can search you tube for more information on how to do it, suspect you will likely still have to see a shop for diagnosis.
 
Reply


Thread Tools
Search this Thread
Display Modes
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 On
Pingbacks are On
Refbacks are On



All times are GMT -7. The time now is 06:10 AM.