What about that EFI temp sensor?
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Junior User
Joined: Nov 2003
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From: Illinois
What about that EFI temp sensor?
I'll bet this is a new one! I am thinking of installing a low temp thermostat in this engine, along with cooler plugs, so I can bump the timing up some without detonation. I have done this on carb engines with good success. I know that on these EFI engines, there is at least one temperature sensor that tells the EEC when the engine is up to temperature, and to lean out the injectors.
If the engine doesnt get warm enough, the EEC wont lean things down, and there goes the fuel economy. Has anybody found a way around this with lower degree temperature sensor to accomplish what I am trying? Or, is there more to the picture than I am seeing?
I am intending to do head porting, headers, dual exhaust, Diablo chip, and possibly a Cam research camshaft.
If the engine doesnt get warm enough, the EEC wont lean things down, and there goes the fuel economy. Has anybody found a way around this with lower degree temperature sensor to accomplish what I am trying? Or, is there more to the picture than I am seeing?
I am intending to do head porting, headers, dual exhaust, Diablo chip, and possibly a Cam research camshaft.
Lead Driver
Joined: Nov 2002
Posts: 9,557
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From: Concord, NC
I wouldn't go below a 180 degree thermostat personally. The computers use the engine coolant temperature sensor to control the amount of spark advance, the correct air/fuel ratio, cold start rich mixture, etc., for best economy and performance and is an important piece of the EFI system. Your engine will perform better if it is at least 180 degrees.
Posting Guru
Joined: Jul 2003
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From: alaska
Originally posted by EPNCSU2006
I wouldn't go below a 180 degree thermostat personally. The computers use the engine coolant temperature sensor to control the amount of spark advance, the correct air/fuel ratio, cold start rich mixture, etc., for best economy and performance and is an important piece of the EFI system. Your engine will perform better if it is at least 180 degrees.
I wouldn't go below a 180 degree thermostat personally. The computers use the engine coolant temperature sensor to control the amount of spark advance, the correct air/fuel ratio, cold start rich mixture, etc., for best economy and performance and is an important piece of the EFI system. Your engine will perform better if it is at least 180 degrees.
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Joined: Dec 2001
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From: Louisville,Ky.
If you are going to change cams and such, you will either need to have a custom chip burned or my suggestion, convert it over to mass-air. This will let the computer adapt to the increased air flow.
If you don't, it will run very lean and have less power than you have now.
I have seen this done on a friend of mines Mustang.
He installed a B303 cam, ported the heads, off road exhaust and such.
My stock motored LX beat him by 8 car lengths because his car ran so lean.
Mass-air will increase your throttle responce and make driving it alot nicer.
Jimmy
If you don't, it will run very lean and have less power than you have now.
I have seen this done on a friend of mines Mustang.
He installed a B303 cam, ported the heads, off road exhaust and such.
My stock motored LX beat him by 8 car lengths because his car ran so lean.
Mass-air will increase your throttle responce and make driving it alot nicer.
Jimmy
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From: Illinois
It sounds like a 180 is the coolest recomended thermostat. The van has a stock 195, which seems plenty warm to me. Since the computer sees the engine as being "warmed up" at 180, will the 180 be adequate, or borderline?
Thanks!
Thanks!
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Joined: Jun 2003
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From: Calhoun GA
Originally posted by madmurdok
It sounds like a 180 is the coolest recomended thermostat. The van has a stock 195, which seems plenty warm to me. Since the computer sees the engine as being "warmed up" at 180, will the 180 be adequate, or borderline?
Thanks!
It sounds like a 180 is the coolest recomended thermostat. The van has a stock 195, which seems plenty warm to me. Since the computer sees the engine as being "warmed up" at 180, will the 180 be adequate, or borderline?
Thanks!
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