Hey Guys, I have Black Smoke coming out from my exhaust when I push the gas and changing gears. Could it be need to be tune ? Cause I did got OTTP tune with 42lbs, 2.9 pulley, ZZP 3" CAI, Dual Bypass, Option B Tank, Phenolic Spacer, Bad Mab, ZZP 3" Catted Downpipe with 2.5 exit, and ZZP 3 Chambered Exhaust. So far no check engine light come on at all only seeing Black Smoke come out when I rev my car or going on a drive and changing gears can see Black Smoke. I dunno if I need to get my car tune. I know it could be running rich and it could be dangerous. I may be wrong, I just need ur advise what I am suppose to do with my car.

 

Black smoke probably means your car is running rich

 

rich is "safer" than lean, but you should get it looked at. im guessing youre not running a wideband?

 

I just looked at what you posted again and you said do I need to get my car tuned, Arent you tuned for the 42lb injectors and the 2.8 pulley right now?

 

I am tuned by OTTP 42lbs with 2.9 pulley. No, I am not running wideband but I am planning to get my car tune done soon.

 

Your car is tuned already, So what are you going to get retuned by HPT or someone else?

 

I am gonna get my car tune by professional in my area n Yes they had been tune somebody Cobalt before. They are charging me $200 dollars 1 time only then after that I can keep going back to them if I am modding my car more. That's nice.

 

I got OTTP Stage 1 kits that is my first mod. Then add more to it, Yeah need to get it retune.

 

I haz black smoke too. but its normal on a lnf lol

 

Just needs a tune. Probably the canned tune you got from OTTP is just a conservative rich tune to keep things safe. You may still get a puff of smoke when you first go WOT, at least I do, but only people outside the car can notice it.

 

Nobody can give you a definate answer until you put a wideband in the car. Personally I would never tune a vehicle without one ever.

 

With my OTTP stage 2 canned tune after I hooked up my wideband it pegged 10.0 a WOT. And the gauge only goes to 10.0 so who knows how rich it was. Like stealthy said, you need a wideband to get an actual answer.

 

I would Love to get wideband but my budget don't cut for it right now. I will get wideband in time. I did told the professional to look at my Air/Fuel and make sure they are safe. They will take care all of that next week, I will meet with them.

 

I dont know how they are going to look at your AFR's without a wideband guage in the car

 

They should cause it should be in their laptop ?

If not then I can make an exception to ask them if they can do that ?

 

Um. If a wideband isn't in your budget, what do you have saved up in the very likely case that the tune is off due to the lack of a true wideband something like a piston or ring melts?

What's "in" their laptop? The LSJ does not have a true stock wideband a/f sensor. Doesn't matter how high tech they claim their stuff to be, they can't create a sensor that doesn't exist. They can read some data, but it won't be nearly as accurate as having an actual wideband.

You might want to ask them ahead of time if they'll even tune you. Lots of tuners will not.

 

They need to wideband guage for the wiring to get that information to their laptop

I dont remember what the wire is called but there is a wire thats part of the windband that your tuner is going to have to connect to the box for that information to get to the laptop

 

[QUOTE=alleycat58;6472094]Um. If a wideband isn't in your budget, what do you have saved up in the very likely case that the tune is off due to the lack of a true wideband something like a piston or ring melts?



What's "in" their laptop? The LSJ does not have a true stock wideband a/f sensor. Doesn't matter how high tech they claim their stuff to be, they can't create a sensor that doesn't exist. They can read some data, but it won't be nearly as accurate as having an actual wideband.

You might want to ask them ahead of time if they'll even tune you. Lots of tuners will not.[/QUOTE]

True statement here

 

X2.. OP, use your budget to get a wideband and just hold off on the tune for now.

 

Ok, I will hold off tune til I get wideband first then get it tune.

 

I have black smoke come out of exhaust too.. everytime I wot and then shift it smokes black. it normal though cuz i LNF.



******* Captain caveman over here.

 

Hey Guys, I did talked with the professional tuner and he said he will put wideband sensor in my car to get my car tune then he will take it off. So, I am good to go right ?

 

That decision is up to you really. Not sure how he's going to put the wideband in and take it out, generally you have a bung welded into the exhaust. Unless he's talking about one of the "sniffer" type things people put in the tailpipe, and those are not nearly as accurate as a proper wideband.

I mean, if you're OK driving around in a tuned car with no wideband, it's your ass. Well, your car's ass really. I wouldn't be comfortable doing it, most other people wouldn't be comfortable doing it. But if you want to do it, your choice. Just realize if something is amiss with the car or the tune, a wideband is one of if not the best way to tell there's a problem before the engine blows. When people have done this in the past, things have not ended well.

 

Just do yourself a favor. DON"T TUNE THE CAR UNTIL YOU GET A WIDEBAND! There is no way around it so just wait. The canned tune that is in your car now if perfectly fine for the type of driving that you are doing. /thread

 

The tuner is going to use a WB controller, hooked the WB o2 to the front sensor, and hook it to his HPT or w/e he is tuning with. (more than likely) I have seen this done when the customer doesnt have a WB. It is basically the same thing but the customer obviously wont be able to see the AFR after the tuner is done. On pump gas they dont have as seriously of a blend change as say E85 so the AFR should flucuate much from when it was tuned unless they have a vacuum leak or something else serious going on.