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2000 Toyota Corolla Won't start when it's hot

Tiny
KPANASY
  • MEMBER
  • 2000 TOYOTA COROLLA
  • 4 CYL
  • 2WD
  • AUTOMATIC
  • 85,000 MILES
I have a 2000 Toyota Corolla; it always starts right up when it is cold, how ever, if I'm out & about running errands with several stops & starts, when it is hot, it will not start.
1) The fan is working correctly
2) The coolant level is good
3) Temperature gauge is at a good level
I usually have to wait 15-20 minutes and then if I'm lucky it will start right up.

If anybody has any ideas, I'd really appreciated.

Thanks,
Kit
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Monday, August 25th, 2008 AT 3:57 PM

8 Replies

Tiny
MMPRINCE4000
  • MECHANIC
  • 8,549 POSTS
Assuming you are not getting any error codes, I would think it is fuel related (pressure).
Check the pressure during the event with a mechanical gauge see what it is.

I would also have the PCM scanned (any auto parts stores) to see if there are any pending codes.
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Tuesday, August 26th, 2008 AT 6:59 AM
Tiny
KPANASY
  • MEMBER
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I don't have any error code. But I was told to have my ECT (engine Control Temperature) or coolant Temp sensor replace.

Doesn't this make any sense?

Thanks,

Kit
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Tuesday, August 26th, 2008 AT 2:34 PM
Tiny
MMPRINCE4000
  • MECHANIC
  • 8,549 POSTS
It is possible, but if these sensors are out of range they should set a code.

Have the car scanned in live data mode and see what the sensors are displaying, compare this to the normal range to isolate the problem.
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Wednesday, August 27th, 2008 AT 4:06 AM
Tiny
KPANASY
  • MEMBER
  • 4 POSTS
No check engine display and no error code present, I just replaced the Coolant temperature sensor. I still have the same problem hard to start and excessively cracking ONLY when the engine is running HOT. Could it be the fuel pressure regulator or the fuel pump? Today, I started the car and rev the engine several time. The engine felt like it was going to shut down everytime, I rev the engine.

1) does this model toyota corolla 2000 have a fuel pressure regulator? If yes where is it located?
2) Do you think fuel pump is failing or fuel filter clog?

I really appreciated you time and help thank you very much.

Kit
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Tuesday, September 2nd, 2008 AT 8:21 PM
Tiny
MMPRINCE4000
  • MECHANIC
  • 8,549 POSTS
The regulator is located on the fuel rail, it has a vacuum line at one end and a fuel return line.
Check the vacuum line for gasoline, if present, then the FPR has a ruptured diaphram and would need to be replaced.

To check the pump, have the fuel pressure tested with a mechanical gauge. Most cars have a test port on the fuel rail, Toyota's may or may not. Eariler models had a special fitting that screwed into the rail at the cold start valve (after removal of CSV).

If fuel system checks out (I would replace the filter if it has never been replaced). Then it could be an ignition problem (crank sensor for example). The PCM monitors misfires and should set a code.
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Wednesday, September 3rd, 2008 AT 6:13 AM
Tiny
BOLA
  • MEMBER
  • 1 POST
The last tyme I had this problem, my mechanic traced it to the fuel filter. It was clogged with dirt. The reving became smooth after he had changed the fuel filter. With the starting problems, your car computer may be gettiing an 'engine overheating' signal. Engines will not start when overheating is detected.
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Tuesday, March 17th, 2009 AT 1:03 PM
Tiny
DINA1072
  • MEMBER
  • 2 POSTS
Did you find out what was causing this problem? My corolla is doing the same thing. Thank you in advance for any help you can give me.
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Sunday, July 19th, 2009 AT 12:50 PM
Tiny
MMPRINCE4000
  • MECHANIC
  • 8,549 POSTS
Without any error codes, the fuel system would be the first suspect.

Have the pressure measured with a mechanical gauge.

This is a good starting point.

While there are many possibilities, start with fuel pressure, an erratic fuel pump or clogged filter are good starting points.

Next would be ignition (crank/cam sensor) and a clogged or partially clogged CAT.
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Monday, July 20th, 2009 AT 7:48 AM

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