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Go Back   REVscene Automotive Forum > Technical Discussion > Maintenance, Engine & Driveline Tech

Maintenance, Engine & Driveline Tech This forum is brought to you by The Speed Syndicate (TSS) in Burnaby.
Discussion of maintaining your engine, transmission, differentails, rear ends, and mods associated with "driveline" parts..

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Old 02-25-2009, 01:13 PM   #1
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AEM wideband A/F Controller

Is it a good or bad idea to install this ? and is it EASY to install yourself or do you need to take it to a shop? what would the cost be if so !?
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Old 02-25-2009, 04:17 PM   #2
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Do you have a standalone ECU? If not, don't bother.
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Old 02-25-2009, 04:23 PM   #3
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why cant u run a wideband without a standalone ecu?
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Old 02-25-2009, 04:27 PM   #4
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Quote:
Originally Posted by bcrdukes View Post
Do you have a standalone ECU? If not, don't bother.
^^

What he said.
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Old 02-25-2009, 04:28 PM   #5
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Quote:
Originally Posted by yadoh View Post
why cant u run a wideband without a standalone ecu?
It's not that you can't; rather, it's pretty pointless. All you're doing is watching the numbers dance around as you drive, but otherwise it's merely that. A/F gauges/controllers are pretty much intended for proper tuning, not for looking cool.
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Old 02-25-2009, 04:32 PM   #6
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it's better to say it's useless unless u have a tuning device
not everyone needs a standalone ECU
a lot of people get by with piggyback ECU's
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Old 02-25-2009, 05:14 PM   #7
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I think the term "standalone ECU" would also cover piggybacks but I'm not going to get detailed nor technical about it so I'm going to leave it open for interpretation.
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Old 02-25-2009, 06:04 PM   #8
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If you have a turbo charged engine I would always say it might be an idea to have. Though you may not be able to tune, but if your pushin the engine and you see that the A/F Is leaning out, you can let off and save the engine. Without one (or an EGT) you may not know that theres a problem till your picking parts up off the road.
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Old 02-25-2009, 07:06 PM   #9
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It's a gauge you should have if you're boosted. Plus most boosted cars should have some sort of engine management whether it's standalone or piggyback.
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Old 02-25-2009, 07:12 PM   #10
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I just bought the car and do not know if it is a stand alone ECU or not...how do I figure that out
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Old 02-25-2009, 07:19 PM   #11
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Quote:
Originally Posted by SamJ5 View Post
I just bought the car and do not know if it is a stand alone ECU or not...how do I figure that out
A good indication of whether you're running an EMS or not is if your car is stock or not. Is the engine stock? Are there any modifications apart from maybe an axle-back muffler? If there aren't, chances are pretty damn good you're running a stock ECU.

Here's a question none of us have asked yet: Why do you want an A/F controller?
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Old 02-25-2009, 07:59 PM   #12
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I jsut want it to see if the car is running lean or rich..its a 96 civic with a 01 sir engine in it. and the ecu is chipped
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Old 02-25-2009, 08:06 PM   #13
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u want to put a wideband on a n/a engine? lol... does it have full n/a bolt ons?
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Old 02-25-2009, 08:11 PM   #14
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hmm explain
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Old 02-25-2009, 08:31 PM   #15
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Quote:
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I jsut want it to see if the car is running lean or rich..its a 96 civic with a 01 sir engine in it. and the ecu is chipped
Chipped? With what?
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My friend and I did a heater core in a Z4.

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Old 02-25-2009, 11:05 PM   #16
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hmm explain
Does your car have a full exhaust from the engine's exhaust ports to the tip of the exhaust (header, test pipes, cat back, etc)?

Does your car have an aftermarket intake?
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Old 02-26-2009, 10:20 AM   #17
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it doesnt have headers but the rest is aftermarket..and yes AEM cold air intake
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Old 02-26-2009, 10:21 AM   #18
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chipped so that vtec hits at 4500...I couldnt tell ya what kind though :S
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Old 02-26-2009, 10:34 AM   #19
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I would just not bother with it. Save yourself the money and buy your friends some pizza and beer or something.
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My friend and I did a heater core in a Z4.

I'd rather go to guantanamo bay
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Old 02-26-2009, 01:06 PM   #20
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Quote:
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u want to put a wideband on a n/a engine? lol... does it have full n/a bolt ons?
You can still run a wideband on an N/A engine, especially if you start running more agressive cams, etc. I ran one on my last car which was an N/A build, but it was more in part because I was running a full standalone system and had to tune it from scratch.
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Old 02-27-2009, 09:43 AM   #21
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Quote:
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it doesnt have headers but the rest is aftermarket..and yes AEM cold air intake
It's likely that any changes to your A/F resulting from those mods are still within the ability of your ECU to compensate. I'm going with BCRDukes on this on, save your money. It's nice to see and can keep your from blowing up your engine but there's a couple things that might keep you from wanting to use it too.

1. If you have a stock narrowband and that's what the ECU expects then you'd have to run the controller in narrowband mode anyway.
2. Some controllers can have multiple outputs, narrowband for the ECU and wideband for a gauge. Once again though if you can change the tuning on the ECU or don't want to then this is pointless. I think the LC-1 supports this but it's 2-300 shipped.
3. You can put an extra bung in your exhaust for the new sensor but again, money++

If it ain't broked....
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Old 02-27-2009, 09:47 AM   #22
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It's likely that any changes to your A/F resulting from those mods are still within the ability of your ECU to compensate.


The stock ECU is capable of doing what's best for your car until you know you've modified the motor beyond what it was designed to handle. If you push your motor beyond these boundaries, you'll need to run a standalone in which you can then make good use of the wideband O2.
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Old 03-01-2009, 09:50 AM   #23
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What you have sir is probably just a Vtec controller. to make it hit the crossover point sooner.

i would go with everyone else and say you don't need it. an intake and an exhaust should learn your engine out, but no significantly.
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