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Originally Posted by BowTie Eater 5 Liter
the codes i got were due to the egr system, and the vehicle not being at running temp. i got a tps below min. voltage code also
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The EEC is looking for the EGR sensor to check if it's working or not. Either connect it up or you need a chip or something to bypass it.
The temp issue may be related to a bad coolant temp sensor which may be preventing the EEC from switching to closed loop mode.
The TPS error is proably causing the engine to run badly since the EEC sets the TPS voltage on startup. Only fix is to replace the TPS.
Change one at a time and clear the codes before restarting the engine.