Major Issues with New Build 1997 LT1
April 2011 ROTM
Joined: Mar 2009
Posts: 22,023
From: Tokeland, Washington
ROTM Winner's Club
i would take the front cover off and check the timing chain to make sure its on correctly. when this is done if the cam is installed correct i would then send the opti back to sumitt and get another sent.
Thread Starter
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In the Staging Lanes
Joined: Dec 2010
Posts: 58
Old O2's used during intial start new installed after car came up to temp them cooled again. Problem with lack of power has been narrowed to only getting a static compression of 95 pulled plugs and they are wet. So that leads me to a timing issue that is one of a few things timing chain installed wrong cam sprockets not installed correctly which would retard or advance the motor. and a few other things.
Thread Starter
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In the Staging Lanes
Joined: Dec 2010
Posts: 58
In the process of pulling the front and top of motor back apart and checking the timing chain and cam then Re-degreeing the Cam putting back together and hoping for the best. If this doesn't work I'll have to garage the car until after the Jan because funds have been completely drained 17k invested in this total rebuild which included suspension, transmission, exhaust, motor, and new convertible top.
1st Gear Member
Joined: Jun 2010
Posts: 102
If you have not started yet, do this.
1.With the engine running remove the valve cover oil cap and see how much air comes out.
The more the air the more the rings are worn.
2.Remove the fuel pump fuse and the ignition fuse and ingition lead from the coil to the opti.
Crank the engine or use the fuel pressure port to let all the fuel pressure out. Use a rag and not over a hot engine!
Now using a breaker bar at the crank shaft dampener, turn the engine by hand and listen in from the throttle body intake for any sounds of air coming out of the throttle body. If you here any air its a bad intake valve(s). The same can be done on the exhaust manifolds, hear any air then its a bad exhaust valve(s).
1.With the engine running remove the valve cover oil cap and see how much air comes out.
The more the air the more the rings are worn.
2.Remove the fuel pump fuse and the ignition fuse and ingition lead from the coil to the opti.
Crank the engine or use the fuel pressure port to let all the fuel pressure out. Use a rag and not over a hot engine!
Now using a breaker bar at the crank shaft dampener, turn the engine by hand and listen in from the throttle body intake for any sounds of air coming out of the throttle body. If you here any air its a bad intake valve(s). The same can be done on the exhaust manifolds, hear any air then its a bad exhaust valve(s).
