pHEnomIC

iTrader: (14)

I just did h/c/i on my 404. Car ran perfect before. Put on l92 heads, big cam, and fast 102/102. Now for some reason i am getting a lot of squeaking noises and it runs terrible part throttle and idle. Runs amazingly WOT.

I am wondering what it could be, we tried wd-40 on my pulley tensioners and they seem fine.

I was worried it was a cam bearing, but i installed the cam perfectly and i have great oil pressure.

That leaves it to exhaust leak or maybe even tune.

Is there anything to be worried about?

chriswtx

iTrader: (5)

sounds like a vaccum leak in the fast 102/102.. Make sure its fully seated and not hitting the valley cover bolts. Also check the two halves of the fast for leak..Vaccum leaks will also make squeeking sounds

pHEnomIC

iTrader: (14)

http://www.youtube.com/watch?v=46_zopQ2FpA
http://www.youtube.com/watch?v=6eeytAFlteI

Here are some videos

cam

iTrader: (9)

It does sound like a vacuum leak both theoretically and in the vids. Spray quickstart all around the intake manifold and tb area while its running and when it revs up ( or down sometimes ) you've found your leak

JustAnotherLS2

You haven't tuned it yet?

THENASCAR

iTrader: (19)

best thing to do to check if youve got vaccum leaks, is spray carb cleaner around the intake and see if your engine changes tone or pitch or changes the way its running. usually it will run better when you find a leak spot. if you had hp tuners, you could do this while watching the fuel trims.

pHEnomIC

iTrader: (14)

You can't tune it if you have leaks, I did baseline tune it though.