BigBadViper
Enthusiast
I have bounced mine off the rev limiter several times. It has always been on upshift. I have never had a problem with mine - Yet.
redlined bad now not running right
- Thread starter Twister
- Start date
Make sure you didn't switch #1 and#2 sparkplug wires
Stock rev limit is 6050. We set all re-programmed ECU's to 6250 unless requested otherwise. While not entirely stable unless you have a better than OEM valvetrain, you will not make contact at 6250. The only reason we raise it is so those who shift at 6K dont keep bumping into it all the time.
That said, there is NO way to prevent a mechanical overrev. You can set the rev limiter to 1000, but shift into 3rd at 180mph, and your engine will scream to 18K... once. If he hit first instead of third, it is possible that is what happened. However, it is also possible in lower gears, if the car is accelerating hard and you totally forget to shift, the inertia of the car can drag it past the rev limiter for a split second after it cuts, but this is rare as you would have to be asleep at the wheel not to hit the clutch, or already be in the process of a late shift, or..........
You're killing me man!
Jim
Do you have any shenanigans to share?
I am hacked that Twister didn't let me know if he could see my experimental punctuation picture that took an exorbitant amount of time to create. Until he does, more shenanigans.Do you have any shenanigans to share?
I'm waiting the results of the much suggested compression/leak down tests etc....until then, I am shenanigansless, I am without shenanigan, I am shenanigan-free...
Jim
the face palm was very inique no doubt..That video of the tornado is one of my favorite..Amazeing force
I cleared the codes and drove 2 miles..The check engine light popped back up but it was only the p0301 (misfire at sparkplug 1) the p3000 isnt coming back up (multiple misfires) and the p0320 (crank shaft sensor) hasnt come back on at all...
Dark now and Im tired....will mess with spark plug and boot number 1 tomorrow and see were that leads
I cleared the codes and drove 2 miles..The check engine light popped back up but it was only the p0301 (misfire at sparkplug 1) the p3000 isnt coming back up (multiple misfires) and the p0320 (crank shaft sensor) hasnt come back on at all...
Dark now and Im tired....will mess with spark plug and boot number 1 tomorrow and see were that leads
I'm waiting the results of the much suggested compression/leak down tests etc....until then, I am shenanigansless, I am without shenanigan, I am shenanigan-free...
Jim
I get the feeling Twister is a do it yourself kind of guy...admirable really, but he should take the advice of the tuners that have spent the time to post here and take the car in. Or, he could park it, and go flog the NSX until it blows up again.
Good news it sounds. Thanks for clearing up my experiment. It truly was amazeingly inique.
you could really save yourself alot of bs if you will do a compression test on the cyl that stored a hard code,2 i think you said-the multiple misfires is from the valves floating from the big nascar rev..do a comp test and that will tell you a whole lot real fast..
Nine Ball
Enthusiast
It might take 10 minutes to pull a valve cover, seriously. If you are getting a code on Cyl 1, I'd start with that side first. A busted valvespring or bent pushrod can still trigger a misfire code. Both are a simple fix.
I am pretty sure the SCT rev limiter is 6250. Twister, listen to Nine Ball. I would try that first, and if success isn't found there, take it to the dealer for a compression test.
OK OK OK....
I messed with the p301 misfire at cylinder 1 and readjusted the boot to be a little more snug on the plug...car ran better than ever for about 10 minutes. Than the p0302 (misfire in cylinder 2 came on) Im gonna check that plug shortly but its starting to worry me a lil...
I know how to pull the covers but honestly I wouldnt even know what the hell Im looking for..
Thinking I will just adjust number 2 boot and plug for a good connection and see what she does. Then pull the coveres
bluresrt I have no idea how to do a compression test..hell that was the first time I ever changed my own spark plugs
I messed with the p301 misfire at cylinder 1 and readjusted the boot to be a little more snug on the plug...car ran better than ever for about 10 minutes. Than the p0302 (misfire in cylinder 2 came on) Im gonna check that plug shortly but its starting to worry me a lil...
I know how to pull the covers but honestly I wouldnt even know what the hell Im looking for..
Thinking I will just adjust number 2 boot and plug for a good connection and see what she does. Then pull the coveres
bluresrt I have no idea how to do a compression test..hell that was the first time I ever changed my own spark plugs
compression test ...
Remove the spark plug
Screw the compression tester into the spark plug hole
Turn engine over 4 times
Read guage, record reading
unsrew compression tester and squeeze bleeder to release pressure
Screw sparkplug back into hole.
Finished
Remove valve cover bolts and attachments (like the plug wire holders and breather tube) remove valve cover. Study first valve stem, check the spring retainer keepers. See that the rocker is tight against the valve tip. If the rocker is loose then find the missing piece. Check all valves, retainers, keepers, rockers, pushrods, etc. Look for broken or loose parts.
Remove the spark plug
Screw the compression tester into the spark plug hole
Turn engine over 4 times
Read guage, record reading
unsrew compression tester and squeeze bleeder to release pressure
Screw sparkplug back into hole.
Finished
Remove valve cover bolts and attachments (like the plug wire holders and breather tube) remove valve cover. Study first valve stem, check the spring retainer keepers. See that the rocker is tight against the valve tip. If the rocker is loose then find the missing piece. Check all valves, retainers, keepers, rockers, pushrods, etc. Look for broken or loose parts.
Black Moon
Enthusiast
Save us all the effort trying to figure this out and bring it in for new plugs and wires. Your original post made it sound like a serious issue.
If you are going to attempt to do a compression test make sure you disable the coils so it won't start during the test. I'm not sure if that was mentioned.
If you are going to attempt to do a compression test make sure you disable the coils so it won't start during the test. I'm not sure if that was mentioned.
SkyBob
Enthusiast
How do you disable the coils?
Black Moon
Enthusiast
I've never done it on a Viper but on many others there is a fuse (sometimes 2) for Ignition. The Viper has a 30amp "Ign/Run" relay. Try it.
BAD BOYZZ GARAGE
Enthusiast
Twister,
Be careful when removing the spark plug wires, they will come apart when pulled if not careful.
Best of luck determining your issue.
Toddy
with a sludge hammer
BBG..That is exactly what happenned on number 10...Thing ripped right off the boot. fortunetly it was very easy to remake a connection...
As of about 30 minutes ago I ordered a set of yellow wires from AB's quality wires with the heat shield boot protectors and he was kind enough to give me some free champion OEM spark plugs..
He was a very nice guy and apparently really likes hunting...he was also kind enough to send me the parts before payment saying I could just send him a check after I get the parts and that he has never had a problem with any people from the VCA...
I belieave he goes by the screen name AB of quality wires and wow what a pleasure and all around seemingly good guy...
Ill be takeing the plugs and wires to the dealership and haveing them install. They charge a LOT for this but it "should" be done right
As of about 30 minutes ago I ordered a set of yellow wires from AB's quality wires with the heat shield boot protectors and he was kind enough to give me some free champion OEM spark plugs..
He was a very nice guy and apparently really likes hunting...he was also kind enough to send me the parts before payment saying I could just send him a check after I get the parts and that he has never had a problem with any people from the VCA...
I belieave he goes by the screen name AB of quality wires and wow what a pleasure and all around seemingly good guy...
Ill be takeing the plugs and wires to the dealership and haveing them install. They charge a LOT for this but it "should" be done right
He is a nice guy. He sent my wires to Macedo Motorsports when I went to Florida last year and said to mail him a cheque. He did get ripped off by a tuner (SVS?) on a custom set though. Not sure if he ever did get paid or not after he posted it.
Twister, you still have to grab the plug wire at the boot and not the wire or you'll pull the wires out of the boot. They are actually difficult to rewire unless you have the special pliers of the 2 pc die set.
If you remove the cowl the wires are easy to change if you're careful and do them only 1 wire at a time. The cylinders are numbered odds on the driver's side and evens on the passenger side. Front of engine is #1 and #2 cylinders with 9 & 10 being the rearmost. My coils had the cylinder numbers cast into them.
Ted
Twister, you still have to grab the plug wire at the boot and not the wire or you'll pull the wires out of the boot. They are actually difficult to rewire unless you have the special pliers of the 2 pc die set.
If you remove the cowl the wires are easy to change if you're careful and do them only 1 wire at a time. The cylinders are numbered odds on the driver's side and evens on the passenger side. Front of engine is #1 and #2 cylinders with 9 & 10 being the rearmost. My coils had the cylinder numbers cast into them.
Ted
Next Phase
Enthusiast
Get your car to the dealer and stop driving it.
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