Power loss in high temperatures, power returns when outside temperature gets colder?
08-29-2015, 09:37 AM
#1
Power loss in high temperatures, power returns when outside temperature gets colder?
I have no starting issues whatsoever. It starts just as well being cold as being warm.
As I was traveling for 10 hours straight, with some stops in between to fill up the gas (10 min max), I would notice that the warmer it has gotten, the more power the car lacked. Eventually I got somewhere where it was 45 degrees celsius (113 fahrenheit), and the car just barely had any power to call it a weak MX5. I would slam the accelerator in first gear and it would go slowly to 6K RPM and then start backfiring.
I was horrified, contemplating whether a seal has blown, the ignition partially failed, or anything else.
I decided to stop and check. First, since I had my AC running at max performance, this wall of heat hit me like a brick as soon as I got out of the car. It was HOT, and I was standing in between buildings in the shadow. Then I opened the hood and got blasted with a second wave of heat. I quickly grabbed the rod, almost burning myself and moved away for a few seconds. I have to mention that the coolant temperature meter was still in the middle, so it wasn't overheating.
Honestly, I wasn't even surprised that it was running to terribly. Even tho the performance was this terrible, the car did start without any issues! I started to think that it's the air flow meter that sends incorrect signals. I decided to drive anyway, since I was in a hurry. As the temperature was declining towards 20 degrees celsius, more and more performance came back.
I went to the dealership at home and I told him about the issue. He said it could potentially be the AFM, but might aswell be the PCM that needs an update (as I have said earlier that I've found it on the internet, that people had similar issues like me and had no problems anymore after the update).
Tho he didn't recommend me to leave it at the dealership, since he doesn't know much about the car (there are just 7 in maintenance, and they rarely see them), and looks up most of the stuff on the rx8 communities like this one.
Does any of you have experiences with this? Is it worthwhile to disconnect the AFM at the point when it starts giving trouble in heat so the system refers to the "static air/fuel map"?
As I was traveling for 10 hours straight, with some stops in between to fill up the gas (10 min max), I would notice that the warmer it has gotten, the more power the car lacked. Eventually I got somewhere where it was 45 degrees celsius (113 fahrenheit), and the car just barely had any power to call it a weak MX5. I would slam the accelerator in first gear and it would go slowly to 6K RPM and then start backfiring.
I was horrified, contemplating whether a seal has blown, the ignition partially failed, or anything else.
I decided to stop and check. First, since I had my AC running at max performance, this wall of heat hit me like a brick as soon as I got out of the car. It was HOT, and I was standing in between buildings in the shadow. Then I opened the hood and got blasted with a second wave of heat. I quickly grabbed the rod, almost burning myself and moved away for a few seconds. I have to mention that the coolant temperature meter was still in the middle, so it wasn't overheating.
Honestly, I wasn't even surprised that it was running to terribly. Even tho the performance was this terrible, the car did start without any issues! I started to think that it's the air flow meter that sends incorrect signals. I decided to drive anyway, since I was in a hurry. As the temperature was declining towards 20 degrees celsius, more and more performance came back.
I went to the dealership at home and I told him about the issue. He said it could potentially be the AFM, but might aswell be the PCM that needs an update (as I have said earlier that I've found it on the internet, that people had similar issues like me and had no problems anymore after the update).
Tho he didn't recommend me to leave it at the dealership, since he doesn't know much about the car (there are just 7 in maintenance, and they rarely see them), and looks up most of the stuff on the rx8 communities like this one.
Does any of you have experiences with this? Is it worthwhile to disconnect the AFM at the point when it starts giving trouble in heat so the system refers to the "static air/fuel map"?
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