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-   -   Car wont hold RPM Past 3500.. HELP! (https://mustangforums.com/forum/4-6l-1996-2004-modular-mustang/264328-car-wont-hold-rpm-past-3500-help.html)

havok209 03-25-2007 10:14 PM

RE: Car wont hold RPM Past 3500.. HELP!
 
Yea... I also think thats what it might be. Looks like I'm gonna be doin a cam/spring swap earlier than I thought.

czwalga00gt 03-25-2007 10:15 PM

RE: Car wont hold RPM Past 3500.. HELP!
 

ORIGINAL: havok209

Would the check engine light come on if it was the fuel pressure regulator?

http://www.carrsmith.com/check%20eng...ode%20list.htm

Yes. Only thing is that you usually have to drive it for a while, might take a while for the light to come on.

reelfast02cobra 03-25-2007 10:15 PM

RE: Car wont hold RPM Past 3500.. HELP!
 
25 butthole!!!

NoRdO 03-25-2007 10:19 PM

RE: Car wont hold RPM Past 3500.. HELP!
 

ORIGINAL: reelfast02cobra

25 butthole!!!
lol ass hat

czwalga00gt 03-25-2007 10:22 PM

RE: Car wont hold RPM Past 3500.. HELP!
 
It could be the valve springs like others have said, but it's rare that they would break with what you have done unless you have over revved it.

havok209 03-25-2007 10:25 PM

RE: Car wont hold RPM Past 3500.. HELP!
 
Well... Its got about 125K miles. So its very likely that it is that. Or do you think that the piston rings might be done?

8banger 03-25-2007 10:33 PM

RE: Car wont hold RPM Past 3500.. HELP!
 
Find a fuel pressure tester and check it......maybe check or change the fuel filter also......My fuel pressure wasdroppingand didnt set a code...but could see it through the scanner......Borrow a gauge orfind someone that can check it....Place I'd start....

havok209 03-25-2007 10:41 PM

RE: Car wont hold RPM Past 3500.. HELP!
 
Yea, I'll do that. I just changed the fuel filter like 1 month ago. Guess I'll drop by a mechanic and have him check out the fuel deal...

SVTBill 03-25-2007 10:46 PM

RE: Car wont hold RPM Past 3500.. HELP!
 
maybe you need compression rings

havok209 03-25-2007 10:49 PM

RE: Car wont hold RPM Past 3500.. HELP!
 
I hope not... But thats another thing I was thinking it might be. Im gonna see if the ppl at the shop by where I live have a compression tester. Does anyone know what the normal PSI should be?


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