ZUKIWORLD Online | Suzuki 4x4 Editorial and Forum
ZUKIWORLD Discussion Forum => Suzuki 4x4 Forum => Topic started by: brawnyrebel on August 04, 2008, 03:29:48 PM
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I recently switched back to 3.73's from 4.62's and i have actually been paying attention to the gas mileage now. It probably has not changed much from the axel swap but i'm only getting around 12mpg. 31's and a 4-1 case. It has a 1.6 8v swap from an obd 1 tracker, header and big exhaust. The oxegen sensor is bent at the wire end from the engine leaning on it before it was put in. Also when i wired the generic style sensor to a stock plug i had two reds and a black on the plug and two whites and a black coming out of the sensor. Does it matter which red goes to which white?
(http://img.photobucket.com/albums/v293/brawnyrebel/DSC01214.jpg)
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How are you calculating your MPG? Have you re-calibrated your odometer for the larger tires? With 31" and t-case gears, I would think you should be getting much closer to 20MPG. Maybe a little more if it's fuel injected.
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The speedo is dead on with the case and 31's. I found one of the little radar trailors the cops put out and cruised by it a few times to check. I never calculated it with the 4.62's . I would be thrilled with 20 at the moment
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have you pulled the codes ?
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There's got to be something going on. I know the ECU will go into a "limp home" mode and run intentionally too rich (as it's less destructive than too lean) if it's throwing a code. Get that thing scanned.
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yep my bet is she is throwing a code your MPG is just to low .
my bet is that for some reason your ECM has went to limp home/ fail safe mode
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I agree that it is running in closed loop mode. It is obd1 so i flashed it and i only got the 12 code which is normal. I'm just curious if the sensor is bad but not showing a code. The egr system may not be working due to the hole inthe thorley header not lining up compleatly over the hole in the block causing a little exhaust leak but i was told that it wouldn't cause a noticable difference. Thanks for the help so far fellas
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Buy chance you have not taken the battery cables off since you last drove it for 30 minutes or so did you ?
if so it cleared the ECM and all you will get is a code 12 tell more info is logged .
you need a OBD scan. take it to a dealer or local shop that can do that for you .
if the ECM isnt shooting a code other then 12 then there is mostlike a problem with one or more of the sensors
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I wonder if the ECU could be bad? Not sure how to test for this.
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I have driven it a few thousand miles since the swap. When i start it the light stays on for a moment and then goes off like normal.
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The ECU doesn't always realize there's a problem & throw a code when it's broken. Just a thought.
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The ECU doesn't always realize there's a problem & throw a code when it's broken. Just a thought.
yep very true exspecialy with older ECM's . if the sender completely dies . the ECM simply will not recourd information and make adjustments that the falty sender would be telling it to make .
this is where running a OBD scan comes in . you can eather go through and test each sendor or have the test code run . this will tell you if a sender is not sending info to the ECM IE its faulty or it has a wiring issue . there also is alot of other issues past bad or faulty sendors that will kick the ECM into fail safe mode . running an OBD scan will only give you information on the electronics . in wich case it will help you narrow down the possable problems
JT over on the suzuki forum has a good write up on this as well as how to check the senders . he exsplains it much better then i can and is much clearer .
im not sure if it acceptable to post such a link here on this forum though as some places frown on such things . so if you would like the link i would send it to you in PM