[CVTitan05]

Hey guys, I'm getting fed up with this thing. So when i bought this truck, it barely managed to get 9mpg, the exhaust was completely hacked to sh*t (see here: Code P1283.) So I set out to get the exhaust fixed, and get rid of any leaks. So i bought some JBA LT's from Cajun, Uprev from Joe, stock catted b-pipes, and the stock catback. Installed it all with OEM Nissan gaskets, and torqued everything to spec.

I fire it up, and it was better, but still had leaks, So Jeff told me to loosen everything up, and told me the sequence best to torque it all back down with. So i did, and it got better. You couldn't hear it at idle any more, but you could here it while driving or under load.

So Jeff recommended that the stock b-pipe flanges might be warped, as they are thin and are prone to warping when you torque them down. So i bought the 2.5" cajun catless b-pipes.

Been a few weeks now, and I swear i can still hear it. Now i do have a hearing problem, so its hard to be 100%. It might be injector ticks, header pings, or an exhaust leak. All i know is that since it has the stock muffler, its very quiet and i can here everything that comes from the motor.

I cant figure out how to make it stop. Whatever the sound may be, it makes me cringe every time i drive it. Im so close to pulling it all out and using high temp RTV on the entire system with no gaskets. Also debating on selling it and letting it be someone elses problem.

Any other ideas guys?

 

[Paskell]

see if your mpg has gotten better? get a louder muffler hahah wont hear it anymore

 

[LSturbointeg]

Is there any kind of spray to spray on to detect any leaks?

 

[CVTitan05]

My MPG has gotten better, but is still sub-par. Just did a 250 mile trip this weekend and only got 11.9mpg with the cruise set at 67mph with no hills. My 08 wouldve done the same trip with 17-18mpg, i just needed 4wd once i got there.

I've heard of people using smoke machines to check for leaks, but i dont have one or have access to one.

 

[SeattleDude]

I am battling some exhaust leaks myself with new to me Titan.

 

[HRTKD]

I'm dealing with leaks also. The shop I take the two other family cars to has a smoke machine and they used it to find a number of leaks in my Titan. My Berk Technologies b-pipe flanges aren't fulling seating against the JBA LT header flanges. They used a couple gaskets and some gasket RTV there. But not all the leaks are gone as my CEL is back after about 200 miles. If I hammer the accelerator that seems to be key to getting the CEL to come back on. I'm wondering if I blew out the RTV.

 

[CVTitan05]

I havent had any Check engine light since i got the new b-pipes, so thats a good sign for me.

I think im going to try and rule out injector ticks first, so i ordered 25' of 4 ga wire and a pack of ring terminals, going to make a grounding kit and see if it helps at all.

 

[HRTKD]

I have a grounding kit in mine already. I have ticks, but not enough to bother me.

 

[CVTitan05]

Gonna be impossible to get rid of it 100%, as the injector opening and closing isnt a silent operation. But atleast making it quieter would be nice haha

 

[honda250xtitan]

Sell it and buy mine.



I've got cracked oem manifolds. Super leaky

 

[LaxDfns15]

Wait, you have 10" of lift on your '05 and you're getting 12MPG? Isn't that good for that amount of lift?

If you're not throwing a code I think it's just in your head. Mine kept throwing a CEL and I couldn't find it. Removed/tightened down headers 3-4 times, re-torqued everything, double gaskets on the b-pipes. Joe told me it wasn't serious enough to affect anything and my mpg/power hasn't suffered so I just turned the code off.

 

[honda250xtitan]

Yeah I agree. I'm only leveled with 33's and I average 12mpg lol

 

[Paskell]

Yeah I agree. I'm only leveled with 33's and I average 12mpg lol

i am with honda on this i have 34's with 2.5" lift i get 12mpg if im driving like my grandma.
you should feel blessed to get 11.9mpg with that lift..

 

[CVTitan05]

Thats all highway as well guys, in the city (which is all i drive to work) im lucky to get more than 200 miles to a tank. I dont think thats normal when my last 05 on 37's got a consistent 13mpg, freeway or city.

But, you guys could be completely right, It could be all in my head. I might just be hearing a combination of header ping, injector tick, and the intake noise and overreacting. I think ill start with the grounding kit and try and cure the injector tick, then if i can still hear it, a louder exhaust it is.

 

[Walrus]

My MPG has gotten better, but is still sub-par. Just did a 250 mile trip this weekend and only got 11.9mpg with the cruise set at 67mph with no hills. My 08 wouldve done the same trip with 17-18mpg, i just needed 4wd once i got there.

I've heard of people using smoke machines to check for leaks, but i dont have one or have access to one.

Mechanic's stethoscope is cheap at Harbor freight tools.

 

[nightowl]

If you have a shop vac reverse the flow into blower mode and duct tape the hose to the tailpipe. Get a spray bottle with warm soapy water and start spraying the connections in front of the bpipe sensor and look for bubbles. That is the best way to find leaks on this exhaust system without paying someone to do it. A leak in front of the bpipe sensor will throw a code, anything behind that sensor is not a cel issue.

Unfortunately Nissan provided us with 2 bolt flanges on these trucks and SUV's which are sub-par IMO. Cajun has the best possible flanges available and if installed properly should not leak with nissan gaskets. If a Cajun flange is warpped or a weld is leaking or cracked ship it back to me and i will fix it.

 

[nightowl]

I havent had any Check engine light since i got the new b-pipes, so thats a good sign for me.

I think im going to try and rule out injector ticks first, so i ordered 25' of 4 ga wire and a pack of ring terminals, going to make a grounding kit and see if it helps at all.

The injectors on these trucks are notoriously loud but headers do sound different than manifolds and my truck has noticable header ping. Just had to get use to that but every truck i have owned has had headers on it.

Jumping from 9mpg to 12mpg is a good jump especially with larger tires and a lift. My mpg dropped 1.5mpg changing from stock size street tires to stock size Bridgestone AT's.

 

[Titangator]

Jeff is so right here, I did the shop vac test and found about 5-6 leaks. On each side of the muffler
at the resonator, and the worst place at the bung on bank one o2 Sensor. So I gooped everything up
including the outside threads of the o2 sensor. It only throws that ghost code now on long trips on the interstate cruising around 75mph. Around town it doesn't throw the code. so I've come to the realization that twice a month I do the ECU reset procedure, got it memorized and the truck runs great.
I've got 164K miles on her and she runs great. Eventually I might replace that one Bpipe and bung but
it's just not that big of a deal anymore. Spent 2 years chasing that code and a ECU reset that takes one minute to turn off the CEL is no big deal...

 

[CVTitan05]

I do have a shop Vac, I'll try that this weekend, thanks Jeff!

Yeah 9 to 12mpg is a pretty big jump, especially with heavy (cheap), 35" MT's. But i plan on trying to squeeze a little more out of her. Going back to 3.36 gears in the rear so my gearing matches and get my 4wd back, and maybe pick up some hwy mpg. And then also with the JBA catback to try and free up the exhaust a little more.

Ill keep you guys posted with my findings.

 

[CVTitan05]

Now im sure you have had this question asked before Jeff, but would it be worth it to cut off the 2 bolt flanges and weld in the 3 bolt flanges with new gaskets? Sounds like an easy deal to me.