Engine - Over heating issue | Ford Escort Owners Association (FEOA)
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Engine Over heating issue

Discussion in 'ZX2 1998-2004 2.0L DOHC' started by Natcox64, Jul 20, 2020.

  1. Natcox64

    Natcox64 FEOA Member

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    Hey guys I noticed the other day my 2003 zx2 took a little while to warm up. So didn't think anything about it. Of course when they start doing this I know there Is a problem. So i went bought a thermostat. Changed it no change. Filled back up with 50/50. Checked oil no coolant. But sense it does this fans dont kick on unless I turn heat on. Changed 40A fuse cause it was starting to look rough. No difference. Still stays on cool side till it's hot almost over heating I would say any ideas?
  2. Gamer92

    Gamer92 FEOA Donator

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    Do you have access to a scan tool? You can’t always trust the temp gauge, I find it’s best to use a scan tool with live data
  3. 4cylinder

    4cylinder FEOA Member

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    since you have a 03 i am going to tell you what the problem most likely is. I am currently trying to get a dense group of people to understand this is what happens and they think that ganging up on me and telling me that i am wrong is somehow going to fix their problem. Kindly just look at the pic i have provided.

    The pic i have provided is from a 2003 zx2 which i ended up buying for $300. The guy originally wanted $1500 but lowered it to $300 when he finally understood what i was telling him was really wrong with his car. The thermostat housing on 99-03 zx2 is awful and made of plastic which breaks down and breaks at the engine seal, the sensor seals, the body separates or all of the things happen.

    What you will likely need to do is get a thermostat housing from a 98 to replace the one you have to fix the issue. These things leak if it breaks like it did in the pic. It will leak in a spot where you will not see it and cause the issues you describe. The car i got ended up messing up a piston as well when it broke the head gasket because he ignored it for too long. This is a common problem with 00-03 zx2 and i have had this happen on my new 03 zx2 in less than 30k mile of owning the car when it was new and still under warranty.

    Attached Files:

  4. Natcox64

    Natcox64 FEOA Member

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    I have no power going to the fans.. I changed the fuse. It looked black like it had burned up. Changed it still no power going to the plug took a test light and tested it still no power. Shop said change the fan and the plug. That's a lot of wiring. Any idea why no power to the plug? Any other thing I can test with the light?
  5. Gamer92

    Gamer92 FEOA Donator

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    Unplug top temperature sensor on thermostat housing while engine is running. Does fan come on then?
  6. Natcox64

    Natcox64 FEOA Member

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    No it does not done tried that think maybe relay is bad?
  7. pextor

    pextor Moderator Staff Member

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    If the relay is bad, you'll need to replace the CCRM - Constant Control Relay Module. It's located under the air filter assembly, and it controls lots of different things.
  8. zzyzzx

    zzyzzx FEOA Member

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    I've never owned a 3rd gen, but it's my understanding that it's possible to replace a bad relay in a CCRM, which is probably easier than doing an oil change on these cars (if changing the oil is anything like a 2nd gen). I know I could do it. It would take more time to find a replacement relay, because electronics parts are pretty much strictly mail order these days.
  9. Natcox64

    Natcox64 FEOA Member

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    sounds like that's the main problem because the starting started to get a little worse so I wonder if his just not short-circuiting in the relay so if I replace it it'll be okay
  10. pextor

    pextor Moderator Staff Member

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    The CCRM is a sealed unit. It can be opened, but it isn't meant to be serviceable. The relays can be replaced (or maybe just resoldered).
  11. zzyzzx

    zzyzzx FEOA Member

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    If you can find the exact relays, they can be replaced. If you can't find the exact relays, they can still be replaced, it just won't look pretty. Yes, I used to be en electrical engineer. Not meant to be serviceable doesn't mean that it isn't serviceable.

    It actually looks easy enough:
    http://automotorpad.com/ford/558823-1999-ford-escort-ccrm-repair.html
    Last edited: Jul 23, 2020
  12. Natcox64

    Natcox64 FEOA Member

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    Changed it fans came when ect was unplugged for a sec.
  13. pextor

    pextor Moderator Staff Member

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    I work in electronics :)
    4cylinder likes this.
  14. Natcox64

    Natcox64 FEOA Member

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    Okay so I think I have the overheating issue under control. I so far have replaced ccrm, fan, fan plug, ect,(not the gauge sensor beneath the ect. ) will get to that in a sec. And finally the battery because it was extremely weak. So I started with ccrm, then fan, and fan plug, also the fuses. So after all this it is still taking me to prime the fuel pump 2 three times to start. Any ideas? Idk where to look idk if I burned new ccrm up? Did I burn plug to the pump up?
  15. Natcox64

    Natcox64 FEOA Member

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    Gauge still kinda hesitates towards cool side. But fan runs as long as the car is on.

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