1st Generation Specific (1979-1985) 1979-1985 Discussion including performance modifications and technical support sections

over heating and won't idle

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Old 03-23-08, 07:03 AM
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over heating and won't idle

can any one help we got the tps adjusted and now need to get the idle set what do we need to do for that. also what caused it all the car is overheating we have changed out the water pump as well as the thermastat with the same problem. we take the car out and she throws water all over out of the overflow bottle very high pressure thanks
Old 03-23-08, 11:22 AM
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radiator clogged or coolant seal (blowby) issue, since yuo already replaced the waterpump and thermostat. few things to check out.
Old 03-24-08, 07:30 AM
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Sounds like you may have combustion gasses escaping into the coolant system, which then pressurizes the radiator and shoots the coolant out of the overflow.

You might try replacing the radiator cap, sometimes they will get weak.
Old 03-24-08, 11:32 AM
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If it's an internal water seal problem, then you can still try Paul Yaws Temporary Water Seal Leak fix. As I recall Yaws original problem that lead him to this fix was just as bad.

If you have trouble finding Yaws fix, I have it here and can upload it.

It only costs about $20 to do and takes about a day to go through all the clean and flush cycles, but it often works and it often lasts for years.
Old 03-25-08, 02:33 PM
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to bugmans-dad .yal live in clarksville,tn thats where im from live in madisonville,ky now i have 1984 gsl se 13b love the car
Old 03-25-08, 03:19 PM
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i found out why my car wont idle. the BACV and the anti afterburner system are competing after each other in a big cycle one turns on one turns off in a big cycle so i went and bought a block off kit so i can just take all those systems off. its from these guys http://www.2751engineering.com/2751parts.html
Old 03-25-08, 03:25 PM
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Is the block off plate the same as 2nd and 3rd gens cuz thats all i see on that site. Racing beat and mazdatrix have those as well i believe

Also maybe i dont fully inderstand the function of those but do they explain the cooling/rad issue?
Old 03-25-08, 03:35 PM
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for the 13b re-egi yes it is just order the S4 NA kit. i think i had too high heat of a thermostat turned out it was a 195 degree instead of a 185 or lower i just picked up a 180 degree yesterday i just haven't put it in yet i will try that sealer for the radiator.
Old 03-25-08, 03:39 PM
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and this sealant stuff i just need to last till the middle of may when i get shipped out to the navy. i will go get some before i start it up again.
Old 03-25-08, 03:40 PM
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It does sound scarily like your coolant seals have a leak and you're getting blowby in the coolant passages. For your sake I hoe it isn't. Best of luck to you. Just don't keep letting it overheat its only going to make things worse. Keep us posted
Old 03-25-08, 03:46 PM
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oh ive never let it actually over heat it starts to and i let it sit and wait it out. then try something else and go run it
Old 03-25-08, 08:03 PM
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ok here is an update its not over heating but it is filling up the over flow bottle. could it be that i have to have a mazda radiator cap? i dont know what it could be.
Old 03-25-08, 08:21 PM
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K i will be the one to say it AGAIN, there is a good possibility as a few others have stated that the combustion gasses are going into the cooling gasses. This has been mentioned in this thread, and i cannot remember if you were the one with the other 2 threads or not, that were similar to this one. Good chance of blow by. as stated.
Old 03-25-08, 09:35 PM
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yeah ill check that out where do i find this Paul Yaws Temporary Water Seal Leak fix. like i said before that water cooling is a whole new thing to me i know nothing about it.
Old 03-25-08, 09:44 PM
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Read this for your idle issues....http://www.nellump.net/peri/epi/firs...gslseIdle.html

As for overheating... If you've got coolant, make sure the water pump is ok. If you have doubts flush the system to ensure the passages are clear. There isn't all that much to the cooling system on these cars.
Old 03-25-08, 10:01 PM
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i do have block off coming for some of this stuff
Old 03-26-08, 12:04 AM
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has anyone not said to run our engine with the rad cap off yet? Watch and smell for the exhaust bubbles escaping.......
Old 03-26-08, 10:20 AM
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Read this for the Temp Coolant Leak Fix:

https://www.rx7club.com/1st-gen-archive-71/engine-o-ring-fix-269544/
Old 03-26-08, 08:14 PM
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ok im going to go try that then thanks i like that info.

and no, no one has said to run it with the cap off i was going to do that anyways when i actually get the block off to get my car to idle
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