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Hard start cold or hot

Tiny
MPV MAN
  • MEMBER
  • 2000 MAZDA MPV
  • 20,000 MILES
My car is hard to start whether cold or hot; I have checked fuel pump, idle air valve, mass air flow, battery power, etc.
Thursday, April 18th, 2019 AT 7:59 AM

4 Replies

Tiny
MOTOR MASTER
  • MECHANIC
  • 279 POSTS
Hello my name is Dave.

There are quite a few possibilities for your symptoms. My first question is how long has it been doing this? Is it possible you got some bad gas or have you had this problem for more than one tank from more than one store? Another question I have is do you have a check engine light on and if it is have you had the code pulled? If you don'y have a code I would expect one to be triggered if the problem persists. I would recommend have the car scanned for codes even if the MIL isn't on at this time because sometimes there will be pending codes for a problem the ECU perceives as a minor or intermittent problem. If you can get it scanned and let us know the results that would be very helpful in helping us diagnose a probable cause for your issue. Look forward to hearing back from you with the results soon and thank you for using 2CarPros.
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Friday, April 19th, 2019 AT 4:19 AM
Tiny
BSERVISS11
  • MEMBER
  • 2 POSTS
I have the same problem. Dave the only codes I get are from my o2 sensors all of them once it starts it runs rough.
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Wednesday, April 15th, 2020 AT 3:56 PM
Tiny
BSERVISS11
  • MEMBER
  • 2 POSTS
It takes a while to get it to start and I worry because there is only 6,000 miles on the motor.
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Wednesday, April 15th, 2020 AT 3:59 PM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 42,949 POSTS
Hello,

This sounds like there is a vacuum leak. To confirm here are two guides we can go over to help us fix the problem:

https://www.2carpros.com/articles/engine-cranks-excessively-before-starting

and

https://www.2carpros.com/articles/how-to-use-an-engine-vacuum-gauge

We should gather the codes as well.

https://www.2carpros.com/articles/checking-a-service-engine-soon-or-check-engine-light-on-or-flashing

Please run down these guides and report back.

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Thursday, April 16th, 2020 AT 10:54 AM

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