4.7 New Build Seems Low on power runs rich

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Rbethel
Posts: 5
Joined: December 24th, 2017, 7:30 am
Stroker Displacement: 4.7
Vehicle Year: 2005
Vehicle Make: Jeep
Vehicle Model: LJ

4.7 New Build Seems Low on power runs rich

Post by Rbethel »

Just installed a 4.7 Stroker in my 05 LJ. Seems to run very rich and low on power. No backfiring seems to idle fine Thanks
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SkylinesSuck
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Posts: 545
Joined: February 14th, 2009, 11:11 pm
Stroker Displacement: 4.6L
Vehicle Year: 1998
Vehicle Make: Jeep
Vehicle Model: Wrangler
Location: Northern VA

Re: 4.7 New Build Seems Low on power runs rich

Post by SkylinesSuck »

Not even close to enough basic information to diagnose. How do you know it's rich? What injectors are you using? What cam? Did you sync the distributor? Did you build the motor yourself or buy a long block? Do you have anything to tune with?
Rbethel
Posts: 5
Joined: December 24th, 2017, 7:30 am
Stroker Displacement: 4.7
Vehicle Year: 2005
Vehicle Make: Jeep
Vehicle Model: LJ

Re: 4.7 New Build Seems Low on power runs rich

Post by Rbethel »

I purchased off of 505 performance. 27lbs injectors. I did Tex on opda and I do not have software to tune with
Rbethel
Posts: 5
Joined: December 24th, 2017, 7:30 am
Stroker Displacement: 4.7
Vehicle Year: 2005
Vehicle Make: Jeep
Vehicle Model: LJ

Re: 4.7 New Build Seems Low on power runs rich

Post by Rbethel »

Complete long block. I do not thinks it’s rich anymore but definelty has less power than factory 4.0
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SkylinesSuck
Donator
Donator
Posts: 545
Joined: February 14th, 2009, 11:11 pm
Stroker Displacement: 4.6L
Vehicle Year: 1998
Vehicle Make: Jeep
Vehicle Model: Wrangler
Location: Northern VA

Re: 4.7 New Build Seems Low on power runs rich

Post by SkylinesSuck »

27#? I think that's too big unless there is something different about your year and fuel pressure or something. Why did you think it was rich before and no longer think so? You are not making this easy. What do you mean you did tex on the opda? 505 has a TERRIBLE reputation on here fwiw.
Rbethel
Posts: 5
Joined: December 24th, 2017, 7:30 am
Stroker Displacement: 4.7
Vehicle Year: 2005
Vehicle Make: Jeep
Vehicle Model: LJ

Re: 4.7 New Build Seems Low on power runs rich

Post by Rbethel »

I will get a wide band on it. Seemed rich at first just because I’m without cats now. Seems to drive like I’m hauling a trailer.
Rbethel
Posts: 5
Joined: December 24th, 2017, 7:30 am
Stroker Displacement: 4.7
Vehicle Year: 2005
Vehicle Make: Jeep
Vehicle Model: LJ

Re: 4.7 New Build Seems Low on power runs rich

Post by Rbethel »

As far as the opda. I did not hook a computer to it and align I just did the tdc method
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