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My name is Doug. Little info about my car that may effect in someways.
2008 OB ISF 52k Miles.
Gutted Cats and Muffler delete.
Also has a O2 censor simulator to eliminate CEL lights from gutted Cats.
Will be removing the 02 simulator because i now have the RR Tune
I live in Northern California.
Recently i've got the RR racing handheld tune(https://www.rr-racing.com/RR-Racing-...isftune002.htm)
After applying the tune. I went to monitor my KCLV with a OBD2 Wifi plug. I noticed everytime i accelerates, my KCLV goes down! So i decides to reset my ECU(Negative battery terminal) and test some stuff out. Note i just drove from San Diego back to SF. I've tried lots of stuff while driving. 1st - 4th pulls, 6th - 8th pulls. Also started at a high gear at low speeds and WOT.
I tested the RR Tune 3 times and the Stock Tune 3 times. I need a little help to identify and eliminates the problem. Any help would be greatly appreciated (Please halp me!)
*RR Tune
- My KCLV starts out at 15.0 and my KFV at -3.0.
- I managed to bring my KCLV down to 9.9
- Same thing, the more i WOT the more it goes down.
*Stock Tune
- My KCLV starts out at 15.0 and my KFV at -3.0
- As i WOT my KCLV goes up
- I managed to brought my KCLV up to 16.3 (2nd test)
- I managed to brought it up to 16.8 (3rd test)
- I have not been success in bringing it above 16.8
*My questions are:
- What would be the cause of this?
- Is my KFV supposed to be -3.0?
- Am i ****ed?
- How ****ed am i?
Last edited by DougieISF; Nov 7, 2019 at 01:47 PM.
I think you did the same, but to get my KCLV up I usually get on the highway, in a high gear (7th or 8th) and go WOT from about 2,000 RPM and take it as high in the rev range as I can. It's hard to do unless you have a nice open stretch of road. That will quickly add or subtract from your KCLV, after a couple of runs you will get measurable increase/decrease. The ECU needs time in the rev band in order to adjust - that's why you do it in a higher gear and let the engine slowly work it's way through the RPM band at WOT. It gives ECU time to learn. WOT runs on higher RPM in lower gears does nothing for my KCLV.
I would try a different gas station just to be sure it's not a bad batch of gas and I would also consider running a quality octane booster or mix in some E85 to see if that helps. If the octane boost helps, you likely have too aggressive of a tune or poor fuel (or both). You should also call RR - they are great at trouble shooting and could give you some solid advice/recommendations.
Also KC is always -3 for me and it sometimes drops (-2, -1) under WOT runs on higher gears but returns to -3 when I let off the gas, when that happens my KCLV goes up. The -3 is normal.
I had this issue before too. I'm pretty sure your passenger side exhaust manifold is cracked. If so, the car will detect false knock and your KCLV will drop. My KCLV was at 12 before I decided to go PPE headers. Onced I installed the headers, my KCLV shot up. Right now my KCLV is currently at 23.5 and it has not budge. Attached are pics of where the crack was on my passenger side manifold.
I had this issue before too. I'm pretty sure your passenger side exhaust manifold is cracked. If so, the car will detect false knock and your KCLV will drop. My KCLV was at 12 before I decided to go PPE headers. Onced I installed the headers, my KCLV shot up. Right now my KCLV is currently at 23.5 and it has not budge. Attached are pics of where the crack was on my passenger side manifold.
I think you did the same, but to get my KCLV up I usually get on the highway, in a high gear (7th or 8th) and go WOT from about 2,000 RPM and take it as high in the rev range as I can. It's hard to do unless you have a nice open stretch of road. That will quickly add or subtract from your KCLV, after a couple of runs you will get measurable increase/decrease. The ECU needs time in the rev band in order to adjust - that's why you do it in a higher gear and let the engine slowly work it's way through the RPM band at WOT. It gives ECU time to learn. WOT runs on higher RPM in lower gears does nothing for my KCLV.
I would try a different gas station just to be sure it's not a bad batch of gas and I would also consider running a quality octane booster or mix in some E85 to see if that helps. If the octane boost helps, you likely have too aggressive of a tune or poor fuel (or both). You should also call RR - they are great at trouble shooting and could give you some solid advice/recommendations.
Also KC is always -3 for me and it sometimes drops (-2, -1) under WOT runs on higher gears but returns to -3 when I let off the gas, when that happens my KCLV goes up. The -3 is normal.
Its so good to know that it's -3.0 I was stressing out about this. Thanks!
What octane gas are you using? If you are using gas below 93 octane that would be a problem with the tune. As Vervish reccomended
using a 25-30% blend of E85 should help.
What octane gas are you using? If you are using gas below 93 octane that would be a problem with the tune. As Vervish reccomended
using a 25-30% blend of E85 should help.
Im always pump 91 from Shell or Chevron. 93 is not available around where i am at. As you and another member stated "below 93 octane that would be a problem with the tune"
I should definitely blend E85 to further diagnose this issue, and see how that goes. Thankk you Sir!
I've had the tune for a few years now. I assume you know that resetting the ECU resets the KCLV at 15.
Mine tends to hover around 18-20 but blending to e30 I get it to 21-23 with spirited driving.
I've never needed to got WOT in high gears just to increase KCLV.
Definitely try blending to see if it increases. Good luck!
Recently I did a dyno and I had power cut off at 3000 rpm and 5500 rpm consistently.
I then went to monitor my kcvl and it was at 13 something.
Tried resetting etc and would never budge past.
I had a muffler delete with all full bolt ons.
This weekend I changed back to the Joez mufflers. Cleaned my maf, cleaned air filter and the ventilation (larger rr racing intake)
So far so good. Numbers climbing.
Don't know because of the rasp or possible exhaust leak / back pressure etc. I'll report again eventually to see if I get over the 20's again and will re dyno.
08 with 52k you may be in need of new spark plugs if they haven't been done yet. Make sure your air filter is clean and MAF is clean. Recently I had a terrible issue of the car being boggy and jerky and KCLV jumping around from 5 to 20 and all in between within a stretch of 5 miles. It was a bad MAF, and a poorly attached intake filter. Now I'm at 22-24 daily. Try some engine fuel treatment such as Techron or Seafoam if you're comfortable with it.
If you're limited to 91 gas, add in some Lucas octane booster with 91 Shell/Sunoco/BP etc and after a few miles do some pulls. You should not necessarily go WOT but rather put the engine under heavy load while in a higher gear. An example is getting onto the highway at 45mph and staying in 7-8th and nearly flooring it in manual mode until you get to 80-90. Watch KCLV and KFV. KCLV will tend to go up once KFV drops from -3 anywhere from 0 to -2. Floor it too much and it will go to -4 or -5 and KCLV will drop, so you have to give it enough load for KFV to go positive from -3.
When you go above a certain RPM, say 4k, the KCLV drops, and then goes back to normal when it's not under load. Ask RR if the tune accounts for 91 fuel. Check headers for leaks and maybe have someone look at your car with tech stream to make sure you 02 sensors and AFR are reading correctly.
KCLV not increasing
