Timeline for How do I know if car ECU has a REV Limiter?
Current License: CC BY-SA 3.0
13 events
| when toggle format | what | by | license | comment | |
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| Feb 19, 2016 at 20:52 | comment | added | Ben | @DavidWinslow The question and my answer need revision. I've been thinking about it. | |
| Feb 19, 2016 at 20:50 | comment | added | Ben | @HandyHowie He's welcome to try if he does. I'm not a lawyer, but I doubt, "A guy on the internet told be it'd be safe" would stand up in small claims court. | |
| Feb 19, 2016 at 15:07 | comment | added | David Winslow | i dont think the question is being answered: "how do I know if my car has a REV-limiter without testing it". is it possible to check without testing? in a limited number of cases you could call the dealer/manufacturer. otherwise, no, you have to test something. maybe the question should be revised? | |
| Feb 19, 2016 at 14:35 | comment | added | Pᴀᴜʟsᴛᴇʀ2♦ | @TMN - There would be three ways to know: 1) Bounce off the rev limiter; 2) Dissect the ECU code; 3) Do research on each and every vehicle. Other than that you are making an assumption, which in my opinion is a bad assumption. Mind you, I'm not necessarily disagreeing with your or Ben. It makes sense that it would be there in modern FI setups and be easy to implement ... but can we make a blanket statement which says it's absolutely there on each and every car ... the answer to that is an unequivocal No. | |
| Feb 19, 2016 at 14:17 | comment | added | TMN | I know my '87 944 has one, I've hit it a few times. Frankly, I'd be shocked if modern ECUs didn't have a simple ignition interrupt. I mean, they control the timing already, how hard would it be to tack on a map of "RPM > 7000 ? Timing = 30° BTDC"? | |
| Feb 19, 2016 at 8:29 | comment | added | HandyHowie | @ben Could it be possible for him to sue you if he blows his engine up? | |
| Feb 19, 2016 at 3:00 | history | edited | Ben | CC BY-SA 3.0 |
Patent listed wasn't relavent. Changed link and year.
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| Feb 19, 2016 at 2:31 | comment | added | Ben | @paulster2 you're right there's no way you would know without researching or testing yourself. | |
| Feb 19, 2016 at 1:46 | comment | added | Pᴀᴜʟsᴛᴇʀ2♦ | I understand where you are coming from, but for the most part it's still an assumption. Is there a way to know for sure any engine has a fuel/spark cutoff? Without specifically researching any engine/vehicle you really don't know for sure. You'll want to double check the patent you have posted ... it's not for over revving, as I stated before. | |
| Feb 19, 2016 at 1:28 | comment | added | Ben | @paulster2 Pretty sure all OBD2 GMs have fuel cutoff (2000 + for sure). I know Mitsubishi uses one as well as Subaru. Nissan for sure as early as 89. | |
| Feb 19, 2016 at 1:18 | comment | added | Pᴀᴜʟsᴛᴇʀ2♦ | I really think it's a poor assumption and one I'd not believe is there. The only engine I know for sure has a limiter (or fuel/spark cutout) is the MX5 Miata. That's only because I tacked one up there once. There may be something in the PCM which does this automatically, but it's bad to assume this is there in all fuel injected vehicles. Plus, the link you provided is for fuel cutoff to save catalytic converters in the case of misfire, not to prevent over revving. | |
| Feb 19, 2016 at 0:42 | vote | accept | Jomar Sevillejo | ||
| Feb 19, 2016 at 0:41 | history | answered | Ben | CC BY-SA 3.0 |