Joined
·
438 Posts
Car had ARH 1 7/8 headers with catted x-pipe installed at the shop with rotofab cai and a dyno tune coulple weeks ago. First I was running muffler delete but got too loud so this past saturday I through some hooker max flo mufflers on it.
The problem......
Once I made the car quiet I noticed four slip fit joints on the arh kit are leaking but didnt have time to fix it, I may take it back to the shop that installed it for them to fix it.
Next problem. ....
I wanted to check fuel trims and misfire on my Snapon solus ultra scanner to see how things looked and was curious about the "missfire" feel.
Sure enough if I held the throttle at about 1400-1500 rpm every cylinder is missing, 0 misfire readings at idle, didnt check anywhere else on the rpm range.
Fuel trims....
STFT 1&2 adding between 2%-5% at idle
LTFT 1&2 pulling -3%
What are some thoughts? Could the leak before the cats cause it to go that lean to add fuel? Also, the misfires? Can the tune cause this?
After the mods the car put down 350 rwhp where others with same mods do about 370rwhp. Could these issues be stealing 20hp? Car does not rip like it should butt-dyno I dont feel it pull harder than before. I see videos where cars are barking between gears and mine is kind of mellow.
I have sent an email out to the installer/tuner waiting for reply. He is a great guy so im assuming he will take care of whatever is wrong.
I want to sort all these things out before I install my dod delete very soon.
Thanks for any input guys.
Sent from AutoGuide.com Free App
The problem......
Once I made the car quiet I noticed four slip fit joints on the arh kit are leaking but didnt have time to fix it, I may take it back to the shop that installed it for them to fix it.
Next problem. ....
I wanted to check fuel trims and misfire on my Snapon solus ultra scanner to see how things looked and was curious about the "missfire" feel.
Sure enough if I held the throttle at about 1400-1500 rpm every cylinder is missing, 0 misfire readings at idle, didnt check anywhere else on the rpm range.
Fuel trims....
STFT 1&2 adding between 2%-5% at idle
LTFT 1&2 pulling -3%
What are some thoughts? Could the leak before the cats cause it to go that lean to add fuel? Also, the misfires? Can the tune cause this?
After the mods the car put down 350 rwhp where others with same mods do about 370rwhp. Could these issues be stealing 20hp? Car does not rip like it should butt-dyno I dont feel it pull harder than before. I see videos where cars are barking between gears and mine is kind of mellow.
I have sent an email out to the installer/tuner waiting for reply. He is a great guy so im assuming he will take care of whatever is wrong.
I want to sort all these things out before I install my dod delete very soon.
Thanks for any input guys.
Sent from AutoGuide.com Free App