Re: Improved MPG Checklist Thread
■ New Spark Plugs
■ New Oxygen Sensors
■ Matching and properly inflated tires
■ Clean or Replace PCV valve
■ Change oil & filter every 3,000 miles
■ Check coolant fluids
■ Clean Fuel Injectors
■ Replace Air Filter
■ Replace Fuel Filter
■ Fuel Pressure Check
■ Use only Premium 91+ Gasoline
■ With an A/T keep the tach between 2200 and 3000 rpm when driving below 45mph.
The A/T torque converter is more efficient in this range.
■ Keep the engine running when stopped for a few minutes
otherwise the ECU goes back into open loop mode.
■ Drive down hill using the trans for braking to warm-up the engine and trans.
■ Change the o-ring on the fuel injectors. On the old engines they are hard and leak.
■ Drive with the TC lock-ed up at 45mph to get the best MPG.
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The torque converter is not very effecient until it gets to 2300 rpm. Try driving in 1st or 2nd when the speed is low to keep the tach up.
I have been watching the O2 and I need someone else to check this. I see it going back into open loop every time the engine is shut off. This is even after the engine is warmed up. Open loop uses more gas.
Driving down a hill in 3rd or 2nd helps to warm up the engine and A/T and does not use gas. This is a much more efficent way to warm-up the SVX.
The o-rings on the fuel injectors are old and stiff and do not seal well. Gas can leak around the injector body. Ah this is just a theory right now. I have the o-rings but have not pulled the old ones out yet. On a hot day the O2 was reading very rich. These o-rings get a lot of heat from the engine and I think will only last more than four years. Gosh I hope they are Viton.
Peace,
John
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