superchip with a rev limiter?
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Joined: Aug 2000
Posts: 38
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From: Arlington, TX USA
superchip with a rev limiter?
This is a question I hope Mike T. will answer. I revved my truck up the other day to show someone how it sounded. At about 3000 rpm it cut out like it hit a rev limiter. I then slowly stepped on the gas to increase rpm's till I got to about 3200 and then it started cutting out again. Today I removed the superchip and drove it a while. Then in the driveway revved it up again. No cutting out at all. Is this normal for superchips or do I have a defective one?
Thanks,
Thanks,
Former Sponsor
Joined: Mar 1998
Posts: 13,385
Likes: 4
From: Virginia
Hi Mike,
Long time no see around here! Nice to see you again.
Thanks for calling so we could go over that. Usually, the type of symptom you have is not related to the Superchip. As I mentioned in our phone conversation, in all the years we've been doing this, we've not had that exact symptom as you describe occur, but there's always a first time!
If this is related to the Superchip, it's probably just file corruption from a static electricity event, etc. Rare, but it can happen, we see that maybe a few times a year, at our levels.
One other thing I didn't mention over the phone is that you actually have a couple of rev limiters; you have a no-load rev limiter, for anytime the engine doesn't have a load on it, like in Nuetral, Park, or with the clutch in on manuals. That is usually no higher than 4500 rpm, and many times is under 4000 rpm. This is implemented so people can't drop a brick on the throttle at 35K miles to grenade the motor & get a new one just before the original base warranty expires, as some Mustang 5.0 owners were doing back in the late 80's. Then there is the "absolute" rev limiter, which varies based on the vehicle & code, usually around 5400-5700 rpm. You could potentially have a bit of tach error and be hitting the no-load rev limiter revving it with no load on the motor like that (which we don't advise doing), but all in all, given what you seem to be experiencing, I think it's a good idea for us to just check that Superchip for you for GP's.
Odds are that this is something else, but as I said above, there's a first time for everything, so we'll check it out when it gets here Mike, & if it's related to the Superchip, we'll take care of it for you right away!
Talk to you soon,
Long time no see around here! Nice to see you again.
Thanks for calling so we could go over that. Usually, the type of symptom you have is not related to the Superchip. As I mentioned in our phone conversation, in all the years we've been doing this, we've not had that exact symptom as you describe occur, but there's always a first time!
If this is related to the Superchip, it's probably just file corruption from a static electricity event, etc. Rare, but it can happen, we see that maybe a few times a year, at our levels.
One other thing I didn't mention over the phone is that you actually have a couple of rev limiters; you have a no-load rev limiter, for anytime the engine doesn't have a load on it, like in Nuetral, Park, or with the clutch in on manuals. That is usually no higher than 4500 rpm, and many times is under 4000 rpm. This is implemented so people can't drop a brick on the throttle at 35K miles to grenade the motor & get a new one just before the original base warranty expires, as some Mustang 5.0 owners were doing back in the late 80's.
Then there is the "absolute" rev limiter, which varies based on the vehicle & code, usually around 5400-5700 rpm. You could potentially have a bit of tach error and be hitting the no-load rev limiter revving it with no load on the motor like that (which we don't advise doing), but all in all, given what you seem to be experiencing, I think it's a good idea for us to just check that Superchip for you for GP's.Odds are that this is something else, but as I said above, there's a first time for everything, so we'll check it out when it gets here Mike, & if it's related to the Superchip, we'll take care of it for you right away!
Talk to you soon,