My 08JK bogs down around 40-50mph i have spectre cai and dua tip cat back exhaust. Tried putting oem intake back on to see if it would go away but it didnt.. Also added a throttle body spacer hoping it would help but it didnt make any difference either. Do u guys think i may need whole exhaust upgrade to flow better out?
Engine bogs at 40 and 50mph
- Thread starter jeep08
- Start date
shadow21
New member
Do you have a tuner on it? If so reset it to stock the reload the map. Also does it make a sound when it bogs down?
I have superchips flashpaq.. I had to turn rev limiter to its max that helped but not much. Im new to learning wat all the flashpaq does n not sure if ineed to start moving shift points or wat?.. I hav 33's as well n programmed speedo accordingly for tire size.. It just wants to bog down between 30-40 and 50-55mph no noise u can just feel it slowly getting sluggish then all a sudden it will gun back up n level out mainly on slight inclines. Im a newbie jeeper so any tips r greatly appreciated!
shadow21
New member
I don't have a Flashpaq but I'd reset then I'd reload. If your ever unsure don't change anything to do with the tuner.
Have you checked to see if you have a vacuum hose un hooked? Or a crack in the air intake or even a hole? If the air intake is not on correctly it could cause the symptoms your explaining.
As mentioned, it sounds like to me like your shift points are off. If you are running new gears and/or bigger tires, you need to make sure you measure your tires correctly and not just go off what's written on the sidewalls and calibrate your speedometer to it.
Stegertime
Caught the Bug
Any engine codes popping up on this? I had similar issues but had a check engine light come on and it turned out to be torque converter, dealer replaced FOC
OUCH!! :cheesy:
Unfortunately, the truth does hurt and this is all true. Maybe if you added headers as well, that would allow for a clean flow all the way through and would help performance but, without it, you'll still be limited. Throttle body spacers are snake oil.
Sharkey
Word Ninja
But, but, but...it's from a Viper so it must be fast, right?
The snake oil comment is perfect, and I truly feel bad for everyone that gets suckered into going this route. I had a pretty good discussion with one of my local dealership's salesman a few years ago about CAI's. He unequivocally told me that my Rubicon would see a 30-40% horsepower and torque gain if I had the dealership install a CAI. Apparently, my resulting uncontrolled laughing was not the response he expected. :cheesy:
Ok so it was the shift schedule.. My Superchips tuner was programmed on superchips setting turned it to stock n everything seems good now! Also double checked measured tires to tire size and axle ratio.. 1st test drive seemed all as well but only bout a mile. Takin 2hr highway trip fri with mild inclines thats wen it bogged most so c how it does!.. O n by the way, for a newbie jeepr lil "snake oil" smears on nicely!. Gota start somewhere!.. Lol
Just to make sure, you measured your tires from the ground to the edge of your tire's shoulder, the point where it turns from the side wall to the tread and NOT the highest point on top of the tread, right? Or, you can measure from the center of your wheel down to the ground and x2. Either will give you what you really need and help ensure your speedo is calibrated correctly.