Missed 4th and hit rev limiter/2nd. - Mustang Evolution

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Old 06-21-2014, 04:29 PM   #1
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Missed 4th and hit rev limiter/2nd.

So took my car to track last night and made only two passes my first pass was fine but my second one I missed 4th and possibly hit second (don't ask me how because I don't know). Now the throw out bearing screams (needed replacing anyway), the car shakes terribly at idle and the car felt awful limping it home last night. No smoke, leaks, oil looks good, and I can still make it into all gears, but it's slightly more stubborn to do that. WTF did I break? Perhaps the trans mount (shaking issue)? RPMs were in the 7k range for about a second and a half before I got out of it. Dropped it off at Ford for an analysis and I'm hoping just something like that, but I hear some ticking and the vibrations are harsh (I really hope no valves bent), but I guess I'll just have to wait and see. Ideas other than dumb comments? Thanks
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Old 06-21-2014, 06:59 PM   #2
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Sry. No good idea, just a dumb comment . Please update this thread when you find out what happened.
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Old 06-21-2014, 08:23 PM   #3
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We'll from my research I am not correct by saying I hit the rev limiter. The rev limiter only prevents you from over revving when in the top part of the gear, however if you down shift like I did it doesn't save you. I' m more Concerned now that while the tranny might have taken some abuse, I could have engine issues as the car didn't have the power driving it home last night and to ford today (exhaust note was different and there is some louder ticks/knocks.). FML
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Old 06-21-2014, 08:31 PM   #4
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We'll from my research I am not correct by saying I hit the rev limiter. The rev limiter only prevents you from over revving when in the top part of the gear, however if you down shift like I did it doesn't save you. I' m more Concerned now that while the tranny might have taken some abuse, I could have engine issues as the car didn't have the power driving it home last night and to ford today (exhaust note was different and there is some louder ticks/knocks.). FML
Your valves are more than likely bent with possible piston damage. You might as well start deciding on a rebuild or salvage yard engine. Hopefully you didnt scar the cylinder walls
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Old 06-21-2014, 10:23 PM   #5
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4.6 2v I'm guessing? How did you hit 7k revs? The limiter should be at 6050 factory, and you don't want to up it unless you have valve train work.
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Old 06-21-2014, 11:05 PM   #6
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Well this car wasen't always a V8 and when MPS auto Salvage sent me the computer I had to give it a stock tune, which I did and it's rev limiter is 6050, however rev limiters don't come into play when you do an accidental downshift (your at too high of a speed..in my case 85ish going from 3rd to 4th w/373 gears).

If Ford tells me what BigShow said and the cost is going to be through the roof I will either just buy another motor and put it in or plan a newer better build (Coyote Swap...the wife will love that...sarcasm) for the future as I'm moving to Japan in August for 3 years. Either way it could of been way worse. I'm trying to look at this on the bright side...A burnt up motor sucks both financially and emotionally since it's my car an all, but its not the end of the world.
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Old 06-22-2014, 12:43 AM   #7
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Quote:
Originally Posted by runvsofthisbull View Post
Well this car wasen't always a V8 and when MPS auto Salvage sent me the computer I had to give it a stock tune, which I did and it's rev limiter is 6050, however rev limiters don't come into play when you do an accidental downshift (your at too high of a speed..in my case 85ish going from 3rd to 4th w/373 gears).



If Ford tells me what BigShow said and the cost is going to be through the roof I will either just buy another motor and put it in or plan a newer better build (Coyote Swap...the wife will love that...sarcasm) for the future as I'm moving to Japan in August for 3 years. Either way it could of been way worse. I'm trying to look at this on the bright side...A burnt up motor sucks both financially and emotionally since it's my car an all, but its not the end of the world.

I mean, at least your didn't die at the track, right? It's always good to be cup half full kinda guy. now you can just make a even faster car!
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Old 06-22-2014, 01:02 AM   #8
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Should of drained the oil in the pan. That would give you a good idea if there was internal damage or not. The dipstick isn't all that telling.
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Old 06-22-2014, 01:42 AM   #9
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I would pull the heads and see if the valves and pistons are ok. That will be your main source of issue most likely.
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Old 06-22-2014, 04:03 AM   #10
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wouldn't a simple compression test tell you if you have bent valves? I couldn't even imagine how many rpms you were turning when you accidentally went into second. Good thing you didn't lock the rear and wreck.
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Old 06-22-2014, 12:31 PM   #11
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Well the rear did lock for about a second and half, but i stayed in a straight line. Yea I'm hoping that is what ford will do. I can't imagine if the transmission is going into all gears with just a tiny bit more effort that it is toasted completely, but who knows. My guess is before ford even begins to tear it down/estimate it that they will run compression test first. I mean used 2Vs are 800-1200 on ebay/craigslist so if i can find one locally and just have it delivered to ford that may be a better route if I decide to fix it now.

Any yes I will have ford drain the pan and see if there are metal chunks in it indicating further damage.
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Old 06-22-2014, 01:30 PM   #12
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Well the rear did lock for about a second and half, but i stayed in a straight line. Yea I'm hoping that is what ford will do. I can't imagine if the transmission is going into all gears with just a tiny bit more effort that it is toasted completely, but who knows. My guess is before ford even begins to tear it down/estimate it that they will run compression test first. I mean used 2Vs are 800-1200 on ebay/craigslist so if i can find one locally and just have it delivered to ford that may be a better route if I decide to fix it now.

Any yes I will have ford drain the pan and see if there are metal chunks in it indicating further damage.
You definitely have valve train damage, thats why your exhaust sounds different and you have reduced power. The transmission may not be damaged if its shifting all 5 gears with no grinding or whinding noise. The extra effort could be from shifting at low rpms with the engine limping.
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Old 06-22-2014, 01:57 PM   #13
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Would a compression test asses valve train damage or just more of the block (piston's etc)?

Might just start looking for a set of complete heads or order through like AM as long as there's no block damage. I can probably use my buddy's F-250 and have my car towed to my normal speed shop to handle this as I'm really busy right now and don't have the time to perform the tear down/install.
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Old 06-22-2014, 02:09 PM   #14
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Would a compression test asses valve train damage or just more of the block (piston's etc)?

Might just start looking for a set of complete heads or order through like AM as long as there's no block damage. I can probably use my buddy's F-250 and have my car towed to my normal speed shop to handle this as I'm really busy right now and don't have the time to perform the tear down/install.
Get the F250 and bring your car to the speed shop. The money you save by not letting ford tell you what you already know can go towards the rebuild or engine swap. Even if you do a compression test you still need to have the heads removed and the block checked out for cylinder or piston damage.
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Old 06-25-2014, 09:34 AM   #15
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We'll good new no bent valves. Cylinder 7 had no compression due to the rocker arm slipping off its wheel. No engine knocking either so once the new rocker and spring come in it should be good to go.
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Old 07-16-2014, 12:46 PM   #16
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Car is back on the road no issues since rocker arm replacement. Back to the track again.
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