Good afternoon,
This sounds like you have a rocker arm that is the issue and one of the valves is not working
https://www.2carpros.com/articles/engine-misfires-or-runs-rough
If you have the codes, it will help me narrow the area of failure.
https://www.2carpros.com/articles/engine-misfires-or-runs-rough
When you removed the valve covers, did you see any damage on one of the rocker arms?
I would also check the compression to be sure there is no internal damage. You should have 140-160 pounds.
https://www.2carpros.com/articles/how-to-test-engine-compression
Roy
1. Remove the valve rocker arm covers. Refer to Valve Rocker Arm Cover Replacement - Left Side (See: Valve Cover > Removal and Replacement > Valve Rocker Arm Cover Replacement - Left Side) or Valve Rocker Arm Cover Replacement - Right Side (See: Valve Cover > Removal and Replacement > Valve Rocker Arm Cover Replacement - Right Side) .
2. Loosen the valve rocker arm bolts.
3. Remove the rocker arms.
4. Remove the pushrods.
The intake push rods measure 147.51 mm (5.81 in).
The exhaust push rods measure 154.87 mm (6.1 in).
Installation Procedure
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1. Coat the ends of the pushrods using prelube. Refer to Adhesives, Fluids, Lubricants, and Sealers (See: Engine > Mechanical) .
2. Install the pushrods.
The intake pushrods are identified with blue stripes.
The exhaust pushrods are identified with yellow stripes.
3. Ensure that the pushrods seat in the lifter bore.
4. Coat the rocker arm friction surfaces using prelube. Refer to Adhesives, Fluids, Lubricants, and Sealers (See: Engine > Mechanical) .
Important: Shims (88894006) may be required under the valve rocker arm pedestals if reconditioning has been performed on the cylinder head or its components.
5. Install the rocker arms.
Notice: Refer to Fastener Notice .
6. Install the rocker arm bolts.
Tighten the bolts to 34 N.m (25 lb ft).
7. Install the valve rocker arm covers. Refer to Valve Rocker Arm Cover Replacement - Left Side (See: Valve Cover > Removal and Replacement > Valve Rocker Arm Cover Replacement - Left Side) or Valve Rocker Arm Cover Replacement - Right Side (See: Valve Cover > Removal and Replacement > Valve Rocker Arm Cover Replacement - Right Side) .
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Wednesday, January 20th, 2021 AT 10:23 AM
(Merged)