Fuel Cut/Rev Limiter - Educate me please
Oct 30, 2012, 11:47 PM
#1
Fuel Cut/Rev Limiter - Educate me please
Tonight, for the first time since I've owned my Evo i took it out for a hard spirited run through some back roads. I had my brother with me and as I'm in the process of the drive, i shifted to third gear and he turns up the volume to a deafening level.
I continued through the same gear but i hadn't realized i was at such a high RPM. I attribute this to me concentrating on the road and being momentarily deaf from the music (so i couldn't hear the engine). I felt the car hesitate once and I immediately looked at my cluster and saw I was reving past 7k (i couldn't tell the exact rpm) then it hesitated again while i was looking and i engaged the clutch and shifted to fourth.
To describe the hesitation the car made; it felt like i was accelerating and the car wouldn't go anymore. I guess it was as if the clutch was slipping. Mind you this hesitation i speak of all happened in less than a second before i shifted.
Can you advise me as to what happened here? Is this because i hit the rev limiter, fuel cut, or both? Did i do any harm to my car? What should i look for with regards to damage. Also The car drove normal afterwards and i didn't smell anything funny. Even though everything appears to be fine with the evo, I'm terrified to say the least.
I continued through the same gear but i hadn't realized i was at such a high RPM. I attribute this to me concentrating on the road and being momentarily deaf from the music (so i couldn't hear the engine). I felt the car hesitate once and I immediately looked at my cluster and saw I was reving past 7k (i couldn't tell the exact rpm) then it hesitated again while i was looking and i engaged the clutch and shifted to fourth.
To describe the hesitation the car made; it felt like i was accelerating and the car wouldn't go anymore. I guess it was as if the clutch was slipping. Mind you this hesitation i speak of all happened in less than a second before i shifted.
Can you advise me as to what happened here? Is this because i hit the rev limiter, fuel cut, or both? Did i do any harm to my car? What should i look for with regards to damage. Also The car drove normal afterwards and i didn't smell anything funny. Even though everything appears to be fine with the evo, I'm terrified to say the least.
Last edited by importmachine; Oct 31, 2012 at 12:15 AM.
Oct 31, 2012, 12:18 AM
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Hitting the fuel cut/rev limiter generally results in a feeling like you suddenly hit a wall, as well as (in my car anyhow) obvious loud exhaust noise (almost a backfire in my car).
Fuel cut is usually based on too high of boost, high egt, knock etc... Whereas rev limiter is caused by reving too high.
As long as you don't hit fuel cut/ rev limiter often, it shouldn't damage your car, however, I would not make a habit of it.
I would be willing to bet that your car is fine, no need to be terrified or worried at this point.
Fuel cut is usually based on too high of boost, high egt, knock etc... Whereas rev limiter is caused by reving too high.
As long as you don't hit fuel cut/ rev limiter often, it shouldn't damage your car, however, I would not make a habit of it.
I would be willing to bet that your car is fine, no need to be terrified or worried at this point.
Last edited by RoMeIX; Oct 31, 2012 at 12:26 AM.
Oct 31, 2012, 01:13 AM
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Details on car would help. if its stock then I wouldn't worry, thats what the rev limiter is for. If its tuned or improperly modded it could be a problem. Take it to 7k again and if it cuts before 7400 then let us know.
Oct 31, 2012, 10:45 AM
#5
Hitting the fuel cut/rev limiter generally results in a feeling like you suddenly hit a wall, as well as (in my car anyhow) obvious loud exhaust noise (almost a backfire in my car).
Fuel cut is usually based on too high of boost, high egt, knock etc... Whereas rev limiter is caused by reving too high.
As long as you don't hit fuel cut/ rev limiter often, it shouldn't damage your car, however, I would not make a habit of it.
I would be willing to bet that your car is fine, no need to be terrified or worried at this point.
Fuel cut is usually based on too high of boost, high egt, knock etc... Whereas rev limiter is caused by reving too high.
As long as you don't hit fuel cut/ rev limiter often, it shouldn't damage your car, however, I would not make a habit of it.
I would be willing to bet that your car is fine, no need to be terrified or worried at this point.
Thanks icmanevo, No the car has never been tuned so i suppose it still retains the stock rev limiter. The only engine mod is a K&N drop in filter.
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