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Today I got on an entrance ramp to the expressway and floored the accelerator. I usually shift between 5,000 and 6,000 RPM, but this time the engine just stopped revving. It was almost as though there was a governor on it.
I got off at the next ramp, then got on another on ramp and floored it again. The engine stopped revving once again. When I shifted to second I could feel the power, but it again stalled around 5500 RPM.
I got off at the next ramp, then got on again, foot to the floor. This time the engine stayed strong all the way up to 6,000 where I shifted to 2nd. A few more tries showed everything to be normal again.
Does anyone have any idea what this could be? It's happened before a couple of times, but not in months.
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Anybody have any ideas? It sounds like it's fuel-related, but there's so much in the way of electronics on these cars that I wouldn't know where to start.
My car would do that same thing after I had been driving it around for awhile. It went away after the SC. So I guess that I really have not been of any help. Some guys are saying that the fuel pump or MAF sensor could be going bad.
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06 Mustang GT
Whipple HO 8psi 445rwhp 409trq custom tune by Injected Engineering, Pypes mid-mufflers, Pypes catted x-pipe, Eibach pro springs, Tokico D specs, Boss 336 20in.
There is a TSB somewhere about the fuel system heatsoaking or starving after prolonged traveling at constant speeds and restarting or reaccelerating from a stop. Check TSB list on the forum and see if its here. It affected the 05 to mid 07 models. I have an 08 and have never experienced the problem myself.
As I think back to the times this has happened, it's been when I've driven the car for just three or four miles from a cold start and then got on the entrance ramp. If it did this consistently after just a few miles, it would make more sense than it being intermittent.
I guess it's one of those problems that will have to become worse so it can be found.
Curious. Does it seem to bog only in the upper RPM range when going WOT or is also doing at initially upon WOT? I know that the TCS will cut fuel and/or spark and it has caused me some embarassment both from a dig and from a roll on initial WOT. If you were getting some wheel spin at the upper RPM's, it could be the TCS.
It just cuts out at about 6200 rpm, as if I'd turned off the ignition. I turn off the TCS when I get in the car, so that's not a problem. Lower RPM's are fine. I can run it up to 6200 in 1st and it will do the same thing.
It's nice to have the protection, but I'd never had a car with a rev limiter before. I just kept my eye on the tach.
Yeah the rev limiter on these cars is disconcerting. I had an 00 where it would 'bounce' off the rev limiter at redline which is more forgiving IMO if you redline it but these cars (05+) just plain SHUT OFF whent they hit that limiter. Even a 1/2 second after you up shift, the car can still be in limbo as the engine turns back on.
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Intermittent acceleration issue
