2007_Shelby_GT Posted December 7, 2007 Report Share Posted December 7, 2007 This evening I was returning home and was "exercising" the SGT a bit, i.e., a couple of quick runs up through the gears! On my last run, I mildly went from 1st through 3rd, then slowed to make the turn onto my street. As soon as I slowed, I knew something was wrong! RPMs dropped, and the exhaust had a distinctive mis-beat note to it. I rounded the turn and attempted to accelerate, but was unable to gain much more than 1/4 of the acceleration I had! Engine was misfiring/missing (no backfiring) and felt like it was running on a lot less than 8 cylinders! I limped home, pulled into the garage, and popped the hood. I carefully gave a couple of taps on the gas - still missing badly. Mystified, I shut down, then restarted, and presto, BACK TO NORMAL!? What do you think? Did the engine computer get confused? Has this happened to anyone else? :unsure: Link to comment Share on other sites More sharing options...
dave c Posted December 7, 2007 Report Share Posted December 7, 2007 This evening I was returning home and was "exercising" the SGT a bit, i.e., a couple of quick runs up through the gears! On my last run, I mildly went from 1st through 3rd, then slowed to make the turn onto my street. As soon as I slowed, I knew something was wrong! RPMs dropped, and the exhaust had a distinctive mis-beat note to it. I rounded the turn and attempted to accelerate, but was unable to gain much more than 1/4 of the acceleration I had! Engine was misfiring/missing (no backfiring) and felt like it was running on a lot less than 8 cylinders! I limped home, pulled into the garage, and popped the hood. I carefully gave a couple of taps on the gas - still missing badly. Mystified, I shut down, then restarted, and presto, BACK TO NORMAL!? What do you think? Did the engine computer get confused? Has this happened to anyone else? :unsure: My guess is you probably hit your rev limiter. It's easy to do. Shift at a little lower RPM's. I definitely think you had too much lead foot. It's safety feature and cuts fuel and retards timing. Easy does it speed racer :P , Dave Link to comment Share on other sites More sharing options...
sdear Posted December 7, 2007 Report Share Posted December 7, 2007 I would say she just wasn't in the mood to excercise tonight :P :D Sorry..couldn't resist Link to comment Share on other sites More sharing options...
2007_Shelby_GT Posted December 7, 2007 Author Report Share Posted December 7, 2007 I would say she just wasn't in the mood to excercise tonight :P :D Sorry..couldn't resist Why that little bi%$h! She'll pay for that! I don't think it was the rev-limiter, (I kept an eye on the tach - never close to the redline), unless it's on a conservative setting. Just odd - hope she doesn't do that again! Link to comment Share on other sites More sharing options...
SGT0701 Posted December 7, 2007 Report Share Posted December 7, 2007 I hit the rev-limiter on the racetrack on Saturday, and it did not require a restart, it was back to normal in just a few seconds. I had what you described happen to me in my 07 Corvette and it turned out to be a fuel injection computer problem covered under warranty. It would happen out of nowhere and required the car to be shut off to correct itself. Link to comment Share on other sites More sharing options...
North Shelby_merged Posted December 7, 2007 Report Share Posted December 7, 2007 I hate to ask...but are you sure you had premium fuel in the last fill-up? I read somewhere that lower octane fuel could give you those symptoms. Link to comment Share on other sites More sharing options...
LuLu Posted December 7, 2007 Report Share Posted December 7, 2007 I hit my "rev limiter" almost every time I take her out. That's not the problem here. Pop your hood and check your air supply. If your bellows/"zip tube" came loose, you are getting too much outside air into the induction system after MAF measurements and EEC adjustments. This will cause a temporary "sputter", and eventually a complete shutdown if not addressed. So...Check all your air path connections for proper sealing, and restart. Best to disconnect your battery for 15 min. or, longer to erase/clear the short term EEC memory. This way, old stuff (like your sputter) gets cleaned out, and you have a clean slate to start over. Yeah, you will have to reset your gauges and radio stations, but so what Link to comment Share on other sites More sharing options...
2007_Shelby_GT Posted December 7, 2007 Author Report Share Posted December 7, 2007 I hit my "rev limiter" almost every time I take her out. That's not the problem here. Pop your hood and check your air supply. If your bellows/"zip tube" came loose, you are getting too much outside air into the induction system after MAF measurements and EEC adjustments. This will cause a temporary "sputter", and eventually a complete shutdown if not addressed. So...Check all your air path connections for proper sealing, and restart. Best to disconnect your battery for 15 min. or, longer to erase/clear the short term EEC memory. This way, old stuff (like your sputter) gets cleaned out, and you have a clean slate to start over. Yeah, you will have to reset your gauges and radio stations, but so what I will do a thorough inspection this evening, then monitor carefully to see if it occurs again and under what conditions. I didn't receive any "idiot" light indicators (perhaps I wouldn't anyway) so I think I will wait to disconnect the battery for a reset. Link to comment Share on other sites More sharing options...
LuLu Posted December 8, 2007 Report Share Posted December 8, 2007 I will do a thorough inspection this evening, then monitor carefully to see if it occurs again and under what conditions. I didn't receive any "idiot" light indicators (perhaps I wouldn't anyway) so I think I will wait to disconnect the battery for a reset. A fresh air leak after the MAF would not produce a MIL, only a very few fuel conditions would. If you decide not to clear the EEC memory, you will need to do a few WOT "on-ramp" romps to overwrite the stored data. That could be fun, keep us posted on any other symptoms? Link to comment Share on other sites More sharing options...
MattInDetroit Posted December 8, 2007 Report Share Posted December 8, 2007 I've had the same issue I think twice both times when in 1st gear. I'll have to check the hints here and see if I see anything. Link to comment Share on other sites More sharing options...
mywickedshelby Posted December 10, 2007 Report Share Posted December 10, 2007 I hit the rev-limiter on the racetrack on Saturday, and it did not require a restart, it was back to normal in just a few seconds. I had what you described happen to me in my 07 Corvette and it turned out to be a fuel injection computer problem covered under warranty. It would happen out of nowhere and required the car to be shut off to correct itself. 701, party of 5 is a great photo Link to comment Share on other sites More sharing options...
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