How does the car drive so well having failed a compression test??
06-07-2020, 03:35 AM
#28
Registered
If using an analog tester, you also want to remove the Schrader valve to get pulses when cranking. Testing in this way is not wholly accurate and those numbers are extremely low, like the car shouldn't start at all. Possible issue with the tool that was used or the way the test was performed. Ideally, you should be using a rotary compression tool.
06-07-2020, 12:11 PM
#29
You gonna eat that?
iTrader: (1)
Thanks for responding so fast and being so kind with my stupidity. I live in southern Colorado and the closest rotary compression tester that I know of is 4 hours away at least. I was instructed not to drive the car that far because something else failing can make the car worse.
I didn't even suspect a failing engine, no symptoms, I was at the dealership for the airbag recall and figured I'd get it checked.
Totally SHOCKED.
It was many months before it started having hot start issues which slowly got worse until I flooded it one morning and could never get it started again.
I have no good idea of how to solve your problem, but if the seller is in any way trying to work with you and help you work through it, maybe try listening to what he's telling you and try to judge if he's acting in good faith.
In the meantime if I were you I'd start researching the forum for threads related to your issue as much as possible to get a better understanding of what you're experiencing.
06-07-2020, 12:14 PM
#30
You gonna eat that?
iTrader: (1)
This is sort of related to this 5 year old post, but I don't know how to create a new post so here it goes. I have a rebuilt motor in my rx8 with 7,000 miles on it and I noticed a slower hot start and it was crawling up a hill. uhoh, time for a compression test. Not my first rodeo. Mechanical in my area don't have mazda compression tester tools and I found one who used a traditional tool and got three readings of about 40-50psi at 300rpms for both front and rear rotor.
I am sorely confused. The guy who sold me the remanufactured engine has a 2 year warranty on it with new rotary housings but I would need to pay a mechanic to pull the engine, ship it to him, and he may try to pull a fast one and say I mistreated the engine somehow. I have 2 weeks for him to honor the warranty if he chooses to do so. He keeps pushing me to have mechanic check plugs and change coils. How the hell would the engine turn over with compression so low?!
what could cause the "analog" tool to give such a low reading? Is it accurate and the engine is somehow just chugging along? My last engine had 60 psi on one rotor face and would not start when hot at all.
So confused.
thanks for reading.
I am sorely confused. The guy who sold me the remanufactured engine has a 2 year warranty on it with new rotary housings but I would need to pay a mechanic to pull the engine, ship it to him, and he may try to pull a fast one and say I mistreated the engine somehow. I have 2 weeks for him to honor the warranty if he chooses to do so. He keeps pushing me to have mechanic check plugs and change coils. How the hell would the engine turn over with compression so low?!
what could cause the "analog" tool to give such a low reading? Is it accurate and the engine is somehow just chugging along? My last engine had 60 psi on one rotor face and would not start when hot at all.
So confused.
thanks for reading.
Any misfires, CELs?
Did you get the OBD scanned?
06-07-2020, 12:21 PM
#31
.
please note that this subject is double-posted
https://www.rx8club.com/rx-8-discuss...6/#post4920584
.
please note that this subject is double-posted
https://www.rx8club.com/rx-8-discuss...6/#post4920584
.
Last edited by TeamRX8; 06-07-2020 at 12:59 PM.
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