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Old 11-30-2008, 09:05 PM   #1
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NEED HELP NOW!!!!

OK so hi i'm James and last friday i bought a 05 GT 5M with 34k miles. It ran perfectly until i decided to tinker with it. I put on a cat-less X-pipe, and changed the oil to 10w-30 royal purple. After a day or so driving around without cats i put them back on but left the X-pipe. Now I have an awful knock. Could it be the oil, or did i screw up the timing running cat-less???
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Old 11-30-2008, 09:35 PM   #2
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Re: NEED HELP NOW!!!!

Could you be a little more descriptive on the knock? Can you pinpoint where it's coming from, when it's happening, etc...
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Old 11-30-2008, 09:37 PM   #3
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Re: NEED HELP NOW!!!!

It is coming from the heads, it barely does it at idle, but it progressively gets louder as i go to about 3k RPMs. At that point its awful i feel like im punishing it
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Old 11-30-2008, 09:42 PM   #4
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Re: NEED HELP NOW!!!!

Have you checked the oil level since doing the oil change?
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Old 11-30-2008, 09:57 PM   #5
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Re: NEED HELP NOW!!!!

yea an its fine
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Old 11-30-2008, 10:17 PM   #6
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Re: NEED HELP NOW!!!!

Is the car throwing a check engine light?
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Old 11-30-2008, 10:31 PM   #7
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Re: NEED HELP NOW!!!!

it did but then it turned off
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Old 11-30-2008, 10:40 PM   #8
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Re: NEED HELP NOW!!!!

exhaust leak at the header to midpipe connection.

unless your motor decided to randomly spin a bearing.
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Old 12-01-2008, 10:19 PM   #9
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Re: NEED HELP NOW!!!!

I was kind of thinking that was it after crawling under it today.....I retightened all bolts and put muffler-weld around the connections we will see how that works out for me tommorow
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Old 12-01-2008, 11:25 PM   #10
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Re: NEED HELP NOW!!!!

how about the VCT system,its a weak point in the 3v.Livornoris motorsports has a little writeup on it
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Old 12-02-2008, 08:09 PM   #11
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Re: NEED HELP NOW!!!!

Victory is mine......I had completely lost a header nut...went to ace bought some replacements and some high heat loctite and she runs like a beauty now
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Old 12-03-2008, 02:45 AM   #12
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Re: NEED HELP NOW!!!!

w00t i win with exhaust leak! was wrong about placement though. Cookie?
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Old 12-03-2008, 03:58 PM   #13
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Re: NEED HELP NOW!!!!

Quote:
Originally Posted by Thomas91169 View Post
w00t i win with exhaust leak! was wrong about placement though. Cookie?
2 chocolate chips cookies for the man!
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Old 12-04-2008, 02:13 PM   #14
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Re: NEED HELP NOW!!!!

i would post u 1 but i dont know how
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Old 12-05-2008, 01:41 PM   #15
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Re: NEED HELP NOW!!!!

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Originally Posted by JamesCB57 View Post
OK so hi i'm James and last friday i bought a 05 GT 5M with 34k miles. It ran perfectly until i decided to tinker with it. I put on a cat-less X-pipe, and changed the oil to 10w-30 royal purple. After a day or so driving around without cats i put them back on but left the X-pipe. Now I have an awful knock. Could it be the oil, or did i screw up the timing running cat-less???
why did you put the cats back on in the first place. you should have just gotton a tuner and taken off the rear banks of the o2 sensors. Any luck on the knocking?
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