long tube headers intall done !!
10-26-2010, 03:36 PM
#22
4th Gear Member
Join Date: Oct 2008
Location: Texas
Posts: 1,130
just got the car back from the shop now the CEL is still on with the same codes but i havent pluged in the MIL's yet, but while in idle and driving it feels like its misfiring but its not throwing a code on it , could it be the whole fuel air ratio thing?? or something eles?
Those codes also may be about the upstream o2s not heating up or cooling quick enough, which is what the LT tune will correct. I have heard of the rear o2s not throwing a code for up to a few months after they have been removed
10-26-2010, 04:09 PM
#23
2nd Gear Member
Thread Starter
Join Date: Sep 2008
Location: Texas
Posts: 215
well i kept thinking about it more and more and, since the front 02 sensors effect the air fule ratio and now the moved from a different place i can see how it would make the car act that way plus i have the higer volume windstar intake im getting more air, more air more fule from what the computer set at, cause like i said it feels like its mis firing but i checked the plugs wire and vacume lines and its all fine
10-26-2010, 05:55 PM
#25
2nd Gear Member
Thread Starter
Join Date: Sep 2008
Location: Texas
Posts: 215
thats what im thinking about after i get this tune for my diablow and hopfully fixes the problem, im gonna get a SCT, if the A/F was off wouldnt it throw a code?
Last edited by xToPPxDoGGx; 10-26-2010 at 06:06 PM.
10-26-2010, 06:40 PM
#28
4th Gear Member
Join Date: Oct 2008
Location: Texas
Posts: 1,130
It doesn't have to be a vac line. You may not have gotten a good seal between the upper and lower intakes. Check where your TB meets the spacer and where the spacer meets the upper intake. I had a slight leak on both sides cause my TB wasn't on quite tight enough. Also look for any small gaps on the intake tubing (such as where the MAF meets the intake tube.) Anything that's leaking after the MAF is going to throw you off slightly.