EFILive tune question...
EFILive tune question... I had my car tuned by a local tuner using EFI Live. My car runs well, but it feels like it has flat spots in the power curve, and feels like it has alot more in it...
It's a MAF-Less tune on it right now, and is throwing codes for both bank 2 02 sensors not working. Will this affect my cars performance greatly?
Also, should my plugs be gapped closer than stock (.050)?
Any info on this would be great.
It's a MAF-Less tune on it right now, and is throwing codes for both bank 2 02 sensors not working. Will this affect my cars performance greatly?
Also, should my plugs be gapped closer than stock (.050)?
Any info on this would be great.
TECH Senior Member
Joined: Nov 2001
Posts: 7,036
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From: Lake Zurich, IL
spark plug gap: what mods do you have? gap depends on horsepower (I recall it being .005 less for every 50rwhp over stock)
if you're throwing codes for BOTH bank 2s... the front is all that matters... and yes it will kill your part throttle drivability... it will force you into open loop (and in your situation open loop speed density) ... if your car's not tuned for that it'll run like *** and use lots and lots of gasoline
if you're throwing codes for BOTH bank 2s... the front is all that matters... and yes it will kill your part throttle drivability... it will force you into open loop (and in your situation open loop speed density) ... if your car's not tuned for that it'll run like *** and use lots and lots of gasoline
Last edited by horist; Feb 13, 2006 at 11:11 PM.
Longtubes and hammer cam are my major mods...
Other than that just bolt ons.. I imagine it to be around 370-380hp.
So get a new o2 sensor for the front, and run o2 sims in the rears?
Other than that just bolt ons.. I imagine it to be around 370-380hp.
So get a new o2 sensor for the front, and run o2 sims in the rears?
Part of the problem could be the o2's aren't heating up and causing them to not switch properly. If you didn't have o2's in the rear then this should have been deleted in the tune. Can you post exactly what codes you are receiving to help us better diagnose the problem.
Originally Posted by SmokingWS6
Are you from around the St. Louis area? I can take a look at it sometime if you'd like.
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I ordered new plugs and my tuner told me to put my good two o2's on the front of bank 1 and 2 and he would turn the backs off. I am just suprised that doing this will cause the car to run so bad.
Keith, I will call you as soon as I get the plugs on.
Keith, I will call you as soon as I get the plugs on.
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Originally Posted by BQTransAm
I am just suprised that doing this will cause the car to run so bad.
Teching In
Joined: Nov 2005
Posts: 25
Likes: 0
From: The Wild.
Originally Posted by SmokingWS6
Bad o2's can throw a tune off so far that it can impair drivability. This in turn can also throw off wot afr, which you mentioned wot performance being affected too. Are you going to go with stock o2's or aftermarket? Either go with ac delco or the Bosch 13111's. Keith might also recommend the same.
On The Tree
Joined: Dec 2004
Posts: 100
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From: Satellite Beach, fl
Originally Posted by hitmansws6
Will fixing the o2's make a big difference even though they aren't being used at WOT?
Last edited by Purrvert; Feb 19, 2006 at 07:16 PM. Reason: spell
Originally Posted by BQTransAm
and is throwing codes for both bank 2 02 sensors not working. Will this affect my cars performance greatly?
I appreciate evryones help with this. I have all the plugs and new o2 sensors sitting and ready to go, but its damn cold to be out under a car.. I am probably going to do all this stuff tomorrow after work so I will update this thread then.
Teching In
Joined: Nov 2005
Posts: 25
Likes: 0
From: The Wild.
Originally Posted by poolshark021
I seems you might have a bigger problem if both right-side 02s aren't working. It would be one thing if both the rears weren't working, but having both bank 2 02s not work indicates another problem. It's probably too much of a coincidence to have them both go out at the same time, I would get in touch with whoever tuned it. Having the right side upstream (B2S1) go bad would definatly cause drivability problems.
Originally Posted by BQTransAm
I appreciate evryones help with this. I have all the plugs and new o2 sensors sitting and ready to go, but its damn cold to be out under a car.. I am probably going to do all this stuff tomorrow after work so I will update this thread then.
The motor is knocking now.
Life is grand.
TECH Senior Member
Joined: Apr 2002
Posts: 6,080
Likes: 17
From: So.Cal.
Originally Posted by BQTransAm
I took it out on the highway and got on it and the car died.
The motor is knocking now.
The motor is knocking now.
This resulted in pinging (or do you mean rod knocking on crank)...?
That sucks. I've seen a lot of rod issues popping up on 2000's. Start with the simple stuff, check the oil, oil pressure, recheck the new plugs. If there's a knock you'd be able to tell which pistion.