wont tach up
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Joined: Dec 2014
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From: ne pa.
wont tach up
the truck is a 99 sd sc 5.4. i blue the engine up. i bought one from a 02. put my intake on it ran ok had a miss..bad coil pack , bad iac,and would hold the shift. then in was getting gas in the oil. i was told to change the intake,it worked.i used the intake from the 02, changed wire harness and ecm. now it will idle all day but when i give it throttle it wont tach over 1500 rpms. and then dies.any ideas on what i can do?
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