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Problem While on high traffic or Parked with car on
08-20-2015, 02:37 PM
Post: #1
Problem While on high traffic or Parked with car on
2000 Mazda 323 • 1.6L 4 cylinder FWD Automatic • 115,000 miles • I live in Dominican Republic (very "tropical" Country).

Hi, when I drive my car on heavy traffic after 5-10 min it start to fail like its out of fuel until it completely shut down. Same happens when I'm parked with the car on.

This does not happens while on highways. If I let the car cool down for 5 minutes or so it will start normally (with fans on to make it faster). My car is not overheating (according to meter on dashboard).

Car is filled with Coolant, I don't think secondary fan start working because according to meter, the car is not "hot". In fact the engine bay is not abnormally hot and the coolant is not boiling if I open the cap.

Someone suggest it could be IAC or Throttle fault but i dont think because the car is perfectly fine the first 5-10 min of heavy traffic. And even if stopped it will work normally with steady idle for 10 min if at night. When this happens if I crank the vehicle right after it shuts down it wont start. I need to let it cool for 5 min with the key on like when its hot.

Other reason why I dont think its the idle speed is: if im stopped with car on, when it start to fail I try to go for a drive, it start to jerk, if I dont get on speed fast (not lucky if im going uphill) it will shut down and I need to wait.
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08-21-2015, 03:28 AM
Post: #2
RE: Problem While on high traffic or Parked with car on
I had a 2001 gmc jimmy that had all the same simptoms of yours and I replaced the fuel pump and fuel filter and all my problems went away. When the mechanic changed the fuel filter it poured out alot of black gunk that was starving the engine of fuel. You may want to try there.
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08-21-2015, 01:55 PM
Post: #3
RE: Problem While on high traffic or Parked with car on
I'd agree with Sandman. Start with a new fuel filter and check the fuel pressure if you have the means. A weak pump or restricted fuel flow will give you those symptoms, more likely when hot. (during the day)

Let us know how you make out.
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