Yes the recommendation did apply to the Lumina Van, that is tilting the engine forward.
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Originally Posted by knuckle ears
As far as the back spark plugs go...I saw on the net an appliance you use to bring the engine forward and then you can more easily change the plugs in the back. It looks like a wedge with a long adjusting bolt through it. Apparently you take out the front motor mount that you see above the rad that is attached to the engine. Usually called the dog bone. This appliance goes in it's place and you loosen the wedge so the engine tilits towards you. The access to the plugs are now easier to get at.
Haven't tried it so not sure. Maybe others have a thought about this.
I would say that just undoing the dog bone and gently tilting it forward with something to hold the motor from crunching the rad and all would be okay as well.
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Some have said they do it blind, crawling over the engine.
However, I did mine from under (I have kind of a pit installation) by removing the front exhaust pipe shield, removing the rear two subframe bolts, and lowering the subframe 1 1/2" :easy visual access .
However, you did not mention any misfires so I think your lack of acceleration is caused by something else. Do you have any codes?
