Quote:
Originally Posted by mikehallbackhoe
dfco is a nice feature, but if the engine is running , it is still burning fuel. the reason I bought this crx is that it has no power steering or power brakes, and a manuel transmission. I do eoc whenever the opportunity arises, which, up here in the mountains, is quiete often. on steep , twisty roads, that means using the brakes a lot. as long as the brakes are up to the task, that's all right with me. If I have to replace the pads more often, that's ok too, pads are cheap.
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But, you can engine brake without engine running, idle cutoff solenoid actually does that automatically and I read from other responses that your car should have that too, so you can kill the engine or not and result should be same, no fuel goes trough engine.
If car ignition lock is operating properly, one should have no steering lock issues when turning key to ACC, that would not allow engine to start while coasting engine off, only when key is removed, steering is allowed to lock, but if there is problem with steering lock, playing with key on speed might give some issues, so one need to be bit careful with that of course.
However engine braking on steep hill cools engine more than if engine is not running at all, so that would reduce economy in your situation, I believe, so for you braking might be better, maybe, it is bit hard to know how much each thing affects, how much are brake pads and how much more fuel engine warmup will need then, lot of factors to consider.
Also brakes don't like from not being used, so they stay in better condition when used, that is too one point that needs to be considered.
You know it best which method will work, you can also make test runs of each method, we can only note things that affect to other things so you have all the information and ideas available to make best decision, so that is my view and opinion on this subject.