# RPM problems **URL:** \ **Category:** Maintenance/Repairs\ **Tags:** ford\ **Created:** [October 17, 2020, 4:01am UTC](https://community.cartalk.com/t/rpm-problems/171289 "2020-10-17T04:01:43Z")\ **Posts on this page:** 20\ **Page:** 1
**Author:** ![Jland7](https://avatars.discourse-cdn.com/v4/letter/j/90db22/32.png) [@Jland7](https://community.cartalk.com/u/Jland7)\ **Post date:** [October 17, 2020, 4:01am UTC](https://community.cartalk.com/t/rpm-problems/171289/1 "2020-10-17T04:01:43Z")
Hello, I’m new here. I just bought a 2009 429R Roush mustang supercharged at only 12,000 miles on the car. I was shifting to 4th from 3rd at a higher RPM starting a race and I accidently caught 2nd gear. Check engine light came on and lost power so I came to a slow. No smoke or anything obviously wrong. I took back off and I was in 1st at 3500 RPM, then 2nd gear… then when it reached 2800 RPM I hear crackling noise and loss of power. I shifted and same thing on every gear except 1st gear. Keep in mind this is a super charged car. It drives at 55 or 60 and I can drive around in any gear with zero issues unless i go to 2800 RPM I’m baffled at what the issue is. What do you guys think? ---
**Author:** ![Nevada\_545](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/nevada_545/32/41232_2.png) [@Nevada\_545](https://community.cartalk.com/u/Nevada_545)\ **Post date:** [October 17, 2020, 5:27am UTC](https://community.cartalk.com/t/rpm-problems/171289/2 "2020-10-17T05:27:59Z")
> [@Jland7](#): > > Check engine light came on and lost power so I came to a slow. No smoke or anything obviously wrong. When a fault is detected by the PCM the rev limiter may be reduced to protect the engine. Connect to the PCM and read the fault codes. Why should there be smoke? ---
**Author:** ![Mustangman](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/mustangman/32/44130_2.png) [@Mustangman](https://community.cartalk.com/u/Mustangman)\ **Post date:** [October 17, 2020, 11:31am UTC](https://community.cartalk.com/t/rpm-problems/171289/3 "2020-10-17T11:31:02Z")
You did what is known as the “money shift” You over revved the engine and bent a valve or 2… at least… and maybe more. I hope your credit is in good shape, this will be expensive. ---
**Author:** ![It\_s-Me](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/it_s-me/32/12660_2.png) [@It\_s-Me](https://community.cartalk.com/u/It_s-Me)\ **Post date:** [October 17, 2020, 12:47pm UTC](https://community.cartalk.com/t/rpm-problems/171289/4 "2020-10-17T12:47:37Z")
> [@Jland7](#): > > What do you guys think? That it’s going to cost you more to fix it than I paid for my last car. ---
**Author:** ![Jland7](https://avatars.discourse-cdn.com/v4/letter/j/90db22/32.png) [@Jland7](https://community.cartalk.com/u/Jland7)\ **Post date:** [October 17, 2020, 3:06pm UTC](https://community.cartalk.com/t/rpm-problems/171289/5 "2020-10-17T15:06:48Z")
I tested that idea, In 1st I took it to 4500… no issues… it’s only happening in 2,3,4, at 3,000 RPM. ---
**Author:** ![Tester](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/tester/32/15976_2.png) [@Tester](https://community.cartalk.com/u/Tester)\ **Post date:** [October 17, 2020, 3:40pm UTC](https://community.cartalk.com/t/rpm-problems/171289/6 "2020-10-17T15:40:10Z")
The last person I know that did that with a Mustang grenaded the transmission. Right after I just rebuilt the turbo engine. Tester ---
**Author:** ![Jland7](https://avatars.discourse-cdn.com/v4/letter/j/90db22/32.png) [@Jland7](https://community.cartalk.com/u/Jland7)\ **Post date:** [October 18, 2020, 4:29pm UTC](https://community.cartalk.com/t/rpm-problems/171289/7 "2020-10-18T16:29:32Z")
Ok i went to Autozone and had code pulled, cylinder 5 is misfiring… any thoughts from this happening from a hard down shift? ---
**Author:** ![It\_s-Me](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/it_s-me/32/12660_2.png) [@It\_s-Me](https://community.cartalk.com/u/It_s-Me)\ **Post date:** [October 18, 2020, 7:22pm UTC](https://community.cartalk.com/t/rpm-problems/171289/8 "2020-10-18T19:22:54Z")
> [@Jland7](#): > > cylinder 5 is misfiring…any thoughts from this happening from a hard down shift? @Mustangman gave you the answer in his first post. > [@Mustangman](#): > > You over revved the engine and bent a valve or 2… at least… and maybe more. ---
**Author:** ![Mustangman](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/mustangman/32/44130_2.png) [@Mustangman](https://community.cartalk.com/u/Mustangman)\ **Post date:** [October 19, 2020, 1:42am UTC](https://community.cartalk.com/t/rpm-problems/171289/9 "2020-10-19T01:42:56Z")
Now you know one of the 3 valves in #5 is bent. I’d suggest running a compression check… I also suggest pulling both heads cause there may be some damage on other cylinders. ---
**Author:** ![FoDaddy](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/fodaddy/32/717_2.png) [@FoDaddy](https://community.cartalk.com/u/FoDaddy)\ **Post date:** [October 19, 2020, 11:11am UTC](https://community.cartalk.com/t/rpm-problems/171289/10 "2020-10-19T11:11:53Z")
Am I the only one wondering how someone manages to hit 2nd gear when downshifting from 4th to 3rd? ---
**Author:** ![Jland7](https://avatars.discourse-cdn.com/v4/letter/j/90db22/32.png) [@Jland7](https://community.cartalk.com/u/Jland7)\ **Post date:** [October 19, 2020, 11:28am UTC](https://community.cartalk.com/t/rpm-problems/171289/11 "2020-10-19T11:28:17Z")
I was in 3rd going to 4th and downshifted to second. ---
**Author:** ![FoDaddy](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/fodaddy/32/717_2.png) [@FoDaddy](https://community.cartalk.com/u/FoDaddy)\ **Post date:** [October 19, 2020, 11:39am UTC](https://community.cartalk.com/t/rpm-problems/171289/12 "2020-10-19T11:39:11Z")
Ah, okay, I misread your initial post. ---
**Author:** ![Jland7](https://avatars.discourse-cdn.com/v4/letter/j/90db22/32.png) [@Jland7](https://community.cartalk.com/u/Jland7)\ **Post date:** [October 19, 2020, 12:10pm UTC](https://community.cartalk.com/t/rpm-problems/171289/13 "2020-10-19T12:10:46Z")
I might have mistyped it, I’m on a phone ---
**Author:** ![It\_s-Me](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/it_s-me/32/12660_2.png) [@It\_s-Me](https://community.cartalk.com/u/It_s-Me)\ **Post date:** [October 19, 2020, 12:16pm UTC](https://community.cartalk.com/t/rpm-problems/171289/14 "2020-10-19T12:16:01Z")
> [@FoDaddy](#): > > Am I the only one wondering how someone manages to hit 2nd gear when downshifting from 4th to 3rd? Or why someone that has a limited edition car (only 100 made) is driving it so hard. ---
**Author:** ![Renegade](https://avatars.discourse-cdn.com/v4/letter/r/b4bc9f/32.png) [@Renegade](https://community.cartalk.com/u/Renegade)\ **Post date:** [October 19, 2020, 2:25pm UTC](https://community.cartalk.com/t/rpm-problems/171289/15 "2020-10-19T14:25:00Z")
"It\_s\_Me Or why someone that has a limited edition car (only 100 made) is driving it so hard. It seem’s that some people have more money than sense. ---
**Author:** ![VOLVO-V70](https://avatars.discourse-cdn.com/v4/letter/v/8e8cbc/32.png) [@VOLVO-V70](https://community.cartalk.com/u/VOLVO-V70)\ **Post date:** [October 19, 2020, 2:30pm UTC](https://community.cartalk.com/t/rpm-problems/171289/16 "2020-10-19T14:30:09Z")
People don’t buy vehicles like this to drive like you are hauling eggs in the trunk. ---
**Author:** ![pyrolord314](https://avatars.discourse-cdn.com/v4/letter/p/6a8cbe/32.png) [@pyrolord314](https://community.cartalk.com/u/pyrolord314)\ **Post date:** [October 19, 2020, 2:31pm UTC](https://community.cartalk.com/t/rpm-problems/171289/17 "2020-10-19T14:31:15Z")
> [@It\_s\_Me](#): > > Or why someone that has a limited edition car (only 100 made) is driving it so hard. > [@Renegade](#): > > It seem’s that some people have more money than sens. Or it could be that someone has enough money to afford a limited edition supercharged car and would rather run it hard on the track than on the street. I don’t know about you, but I’d rather they drive like that on the track than my local highways… ---
**Author:** ![Mustangman](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/mustangman/32/44130_2.png) [@Mustangman](https://community.cartalk.com/u/Mustangman)\ **Post date:** [October 19, 2020, 3:07pm UTC](https://community.cartalk.com/t/rpm-problems/171289/18 "2020-10-19T15:07:16Z")
> [@It\_s\_Me](#): > > Or why someone that has a limited edition car (only 100 made) is driving it so hard Because that is what it was made to do… Limited or not, the car was built to haul @#$, not just to sit and look pretty. ---
**Author:** ![TwinTurbo](https://avatars.discourse-cdn.com/v4/letter/t/8baadc/32.png) [@TwinTurbo](https://community.cartalk.com/u/TwinTurbo)\ **Post date:** [October 19, 2020, 8:14pm UTC](https://community.cartalk.com/t/rpm-problems/171289/19 "2020-10-19T20:14:32Z")
> [@Mustangman](#): > > the car was built to haul @#$, not just to sit and look pretty. Although it probably does both quite nicely. ---
**Author:** ![Jland7](https://avatars.discourse-cdn.com/v4/letter/j/90db22/32.png) [@Jland7](https://community.cartalk.com/u/Jland7)\ **Post date:** [October 20, 2020, 1:12pm UTC](https://community.cartalk.com/t/rpm-problems/171289/20 "2020-10-20T13:12:33Z")
Thank you… not sure why people are giving me h3ll… I made a mistake… I’m about to pay for it. I just needed advice from veteran car peeps. [Next page](https://community.cartalk.com/t/rpm-problems/171289.md?page=2)