Still not idling...radiator smoke?...sad panda
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Still not idling...radiator smoke?...sad panda
86 GXL with engine from 86 base. Installed S5 UIM and blocked off emissions while engine was out.
I've been working on it for the last couple of weeks and now it starts and runs. If I crack the throttle, it runs rock-solid at 1000 rpm.
Yesterday I found out the dynamic chamber and a vacuum hose were leaking, so I fixed them and fired it up. It idled by itself, pretty shittily, but it was trying...around 500 and it was stumbling a little bit.
Took it for a drive around the block and it died again when I took my foot off the gas. When I got back, it wouldn't idle on it's own, and there was smoke or steam?!?! coming out of both ends of the upper radiator hose.
Bad idle - MORE vacuum leaks? bad tps? (should be fine and adjusted, worked on old car just fine)
Steam from radiator - plugged coolant overflow line? I really have no idea.
i'm frustrated. please help.
I've been working on it for the last couple of weeks and now it starts and runs. If I crack the throttle, it runs rock-solid at 1000 rpm.
Yesterday I found out the dynamic chamber and a vacuum hose were leaking, so I fixed them and fired it up. It idled by itself, pretty shittily, but it was trying...around 500 and it was stumbling a little bit.
Took it for a drive around the block and it died again when I took my foot off the gas. When I got back, it wouldn't idle on it's own, and there was smoke or steam?!?! coming out of both ends of the upper radiator hose.
Bad idle - MORE vacuum leaks? bad tps? (should be fine and adjusted, worked on old car just fine)
Steam from radiator - plugged coolant overflow line? I really have no idea.
i'm frustrated. please help.
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I checked it before pulling it from the old car. Both rotors were good (95-ish) with the back one being a little low due to a stuck seal.
When first turning the car over and trying to start it, I heard 5 strong pulses. I tried unflooding it using ATF and now I have 6 strong pulses, I must have unstuck that last seal. I'm convinced compression is fine. When it runs, it runs strong.
When first turning the car over and trying to start it, I heard 5 strong pulses. I tried unflooding it using ATF and now I have 6 strong pulses, I must have unstuck that last seal. I'm convinced compression is fine. When it runs, it runs strong.
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have you pressure tested your cooling system?If i recall 95 is decent compression... its anything thats under 85 that is probably on its way out. 120 is basically max and 100-115 is good compression.
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I have not pressure tested the cooling system, perhaps I should...
I'm wondering if maybe the LIM>engine gasket is leaking.
It's brand new, from mazdatrix, i believe the part is 13-111A-N326.
I didn't put sealant on it....are you supposed to?
I'm wondering if maybe the LIM>engine gasket is leaking.
It's brand new, from mazdatrix, i believe the part is 13-111A-N326.
I didn't put sealant on it....are you supposed to?
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^ its a good idea but not necessary. Did you replace the o rings between the LIM and block?
as far as i know, it sounds like a bad coolant seal, i don't think that the water pump creates enough pressure to blow steam out of the rad hoses unless they are loose... it sounds like cobustion gasses making their way into the cooling system. However i am no expert.
as far as i know, it sounds like a bad coolant seal, i don't think that the water pump creates enough pressure to blow steam out of the rad hoses unless they are loose... it sounds like cobustion gasses making their way into the cooling system. However i am no expert.
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^ its a good idea but not necessary. Did you replace the o rings between the LIM and block?
as far as i know, it sounds like a bad coolant seal, i don't think that the water pump creates enough pressure to blow steam out of the rad hoses unless they are loose... it sounds like cobustion gasses making their way into the cooling system. However i am no expert.
as far as i know, it sounds like a bad coolant seal, i don't think that the water pump creates enough pressure to blow steam out of the rad hoses unless they are loose... it sounds like cobustion gasses making their way into the cooling system. However i am no expert.
I thought about the coolant seal, i'm kinda hoping that's not it for obvious reasons.
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update:
I ran over to Autozone and got their radiator pressure tester...but it's got the wrong adapter on it and they don't have the right one. I can test the cap, but not the cooling system
so, I did the poor man's coolant seals test. I ran the engine at idle and checked for bubbles. NONE. Then I revved it, and the coolant level in the neck went DOWN, not up, so I think the coolant seals are fine.
someone give me something to check, i'm getting furious at this thing.
I ran over to Autozone and got their radiator pressure tester...but it's got the wrong adapter on it and they don't have the right one. I can test the cap, but not the cooling system
so, I did the poor man's coolant seals test. I ran the engine at idle and checked for bubbles. NONE. Then I revved it, and the coolant level in the neck went DOWN, not up, so I think the coolant seals are fine.
someone give me something to check, i'm getting furious at this thing.
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I took a glance through it, found here
https://www.rx7club.com/2nd-gen-archive-72/faq-idle-problems-334730/
The car has to idle for most of those adjustments to happen.
https://www.rx7club.com/2nd-gen-archive-72/faq-idle-problems-334730/
The car has to idle for most of those adjustments to happen.
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Besides, that would be a metered air leak, not a vacuum leak.
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