# Miata Engine Problems - 2002 Mazda Miata

**URL:** <https://community.cartalk.com/t/miata-engine-problems-2002-mazda-miata/50339>\
**Category:** Power/Fuel\
**Tags:** mazda, gasoline, miata\
**Created:** [June 14, 2010, 11:43pm UTC](https://community.cartalk.com/t/miata-engine-problems-2002-mazda-miata/50339 "2010-06-14T23:43:30Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![drmcnabb](https://avatars.discourse-cdn.com/v4/letter/d/e99b99/32.png) [@drmcnabb](https://community.cartalk.com/u/drmcnabb)\
**Post date:** [June 14, 2010, 11:43pm UTC](https://community.cartalk.com/t/miata-engine-problems-2002-mazda-miata/50339/1 "2010-06-14T23:43:30Z")

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My 2002 Miata has an intermittent fuel pressure problem usually on a hot day after running well for hours. Symptoms are hesitation, bucking, missing or stumbling. No CEL is on or stored. After it sets for 30 ? 60 minutes it usually runs well again at least for a while. I replaced the CAS, CPS and EGI Main relay. I ran with a fuel pressure sensor for a while and found that when the problem occurred pressure was erratic. At the time of the failure turning on the key resulted in no pressure at all. So I had the fuel pump replaced.  
  
  
  
 I ran the car for a couple of hours on Saturday in 85+ temps and it seemed fine. However, after taking a 15 ? 20 minute break at a park it would not start. It exhibited the same problem again though the pressure sensor had already been removed. I guess the fuel pump relay is next. What else could cause this?