Ethanol
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Senior Member
Joined: Apr 2002
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From: Dallas
Ethanol
Okay here's another question about Ethanol.
If my programmer was tuned prior to Ethanol being added to our gas( and I've heard and experianced that it makes your truck run like 'CaCa') , do I need to have my programer reflashed to compensate for that?
If my programmer was tuned prior to Ethanol being added to our gas( and I've heard and experianced that it makes your truck run like 'CaCa') , do I need to have my programer reflashed to compensate for that?
Senior Member
Joined: Aug 2004
Posts: 209
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From: New Joisey
My guess would be yes. I ordered an Xcal II from Troyer and one of the questions asked was whether I used straight petrol or ethanol blend. I can use straight gas with the ethanol program, but not the other way around.
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Joined: Mar 1998
Posts: 13,385
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From: Virginia
Hi TexfordD,
Ideally, yes - 10% ethanol blends reduce the stoch ratio from 14.64:1 to about 14.13:1, so what happens is, the more ethanol you use, the more it leans out the engine - now this is when we are talking about a vehicle that is NOT a "flex fuel" vehicle from the factory, like some of the 2006 F-150's are, for example - I just wanted to be clear about that.
Now in normal cruising around at less than about half-throttle or so, no, the ethanol won't make any difference other than reduce fuel mileage a little bit, as the system can compensate in closed loop for that amount of difference - it's when the engine is under a heavy load, operating in open loop, than it would lean out a bit with ethanol blended fuel like E-10, or what we use to call "gasohol."
If you would like to have your tunes adjusted, you need to give us a call and we can look you up to see how long ago they were done and what it would cost to have us make that adjustment for you, if you like - just give us a call at our number listed below.
Ideally, yes - 10% ethanol blends reduce the stoch ratio from 14.64:1 to about 14.13:1, so what happens is, the more ethanol you use, the more it leans out the engine - now this is when we are talking about a vehicle that is NOT a "flex fuel" vehicle from the factory, like some of the 2006 F-150's are, for example - I just wanted to be clear about that.
Now in normal cruising around at less than about half-throttle or so, no, the ethanol won't make any difference other than reduce fuel mileage a little bit, as the system can compensate in closed loop for that amount of difference - it's when the engine is under a heavy load, operating in open loop, than it would lean out a bit with ethanol blended fuel like E-10, or what we use to call "gasohol."
If you would like to have your tunes adjusted, you need to give us a call and we can look you up to see how long ago they were done and what it would cost to have us make that adjustment for you, if you like - just give us a call at our number listed below.