Join Date: Sep 2006
Location: Las Vegas, Nevada
First off we need way more information with the swap did you use NPI gaskets or PI gaskets, what brand of intake Dorman or Ford, Did you change the injector o-rings, did you change the egr gasket, did you change the plenum gasket, how many miles are on the vehicle, when did you last clean the maf, when did you last change upstream o2's?
If all of those were gaskets were changed, and you used the ford intake manifold, and used pi gaskets, then chances are that you have a vacuum leak or dirty maf, other possibilities include things like weak o2's, possibly even a chafed/shorted o2 sensor harness, pcm, failed injector, stuck iac, etc...
Bottom line more info for more answers.
-1996 Pearl White Thunderbird 4.6 Sport 4v with many mods:
Current Best: 13.583 @ 103.74 10/2014.
227hp/241tq measured on calibrated mustang dyno, tested at full vehicle simulation with inertia enabled, no number skewing.
-2001 White Ford F-250 Super Duty 6.8 V10, 4-door, 4x4, Limo Tint, BFG KO2's, Bilstein 7100 Remote Reservoir Race Bypass Shocks, 6" Spring lift, Kenwood Double Din, K&N Intake, FlowMaster Exhaust
Amber_Murder's Daily Driver.
-2005 White GMC Sierra 3500 6.6 Duramax, Dually, 4-door, 4x4, Limo Tint, BFG Commercial T/A's, Rancho RS9000XL Shocks, Kenwood Double Din, K&N Intake, Banks Monster Exhaust
Chris_Murder's Daily Driver.