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Author Topic:   Found Problem!!!

Posts: 20
Registered: Jul 2003

posted 08-21-2003 07:09 PM     Click Here to See the Profile for F-150Moneypit     Edit/Delete Message   Reply w/Quote
I think I finally found the problem! After getting the pan back on (the lower end looked great) I ran the truck to see if the new oil pump would make a difference. It didn't (of coarse). I pulled pass side rocker cover to inspect the oil baffle to make sure if wasn't clogged, and rerouted the PCV from the back of the manifold. I went ahead and pulled the drivers cover as well and hooked my compressor up to the #8 cylinder with both valves in the closed position. I heard a definite air leak in the intake manifold. I thought it may be a bent valve, even though the compression was even in all cylinders. Then I loosened both rockers and put air to it again. Solid! No leak, at least none I could hear. Torqued the exhaust rocker and heard air through the exhaust. The same for the intake. So, I was getting a severe spark knock after warm up! That would also explain the low compression results and somewhat weak low end torque.

So now I'm about to order the Crane adjustable rocker conversion kit and a set of their Energizer Rollers. I'm also going ahead and replace those valve springs since they were overheated. I'm going to try the new Trick Flow valve springs -

Things are starting to look up!

[This message has been edited by F-150Moneypit (edited 08-21-2003).]

[This message has been edited by F-150Moneypit (edited 08-21-2003).]

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Posts: 3448
From: Biddeford,Me.USA
Registered: May 99

posted 08-24-2003 09:45 PM     Click Here to See the Profile for MLariviere   Click Here to Email MLariviere     Edit/Delete Message   Reply w/Quote
That's great! I hope that does it for your problems. Soon you will be able to run it for what it's worth!

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