Yoko

Hi. Here is the short version. The truck runs good then the engine light comes on. At highway speeds the truck at times bucks like a Bronco and no power. Then goes away and all is good. Then the idle is rough and low. This is worse when the engine is hot. Then the light goes off all is good. Then the light comes back on. This is what has been replaced so far. The fuel filter, fuel pump module, cleaned the throttle body (removed it) cam positioning sensor and the ECU. After each item was replaced the truck ran better each time. But, after a day the dreaded engine light comes back aswell as the slow and rough idle. I have had it in a number of shops everybody is baffled. Now I here talks of Egr valve, 02 sensors and DPFE. It's starting to be a cash cow! HELP!

Here are the codes I started with. P0132 High voltage bank 1 sensor sensor1
P0446 Evap
P0191 Fuel rail pressure sensor range performance. Then the above repairs were done.

I don't know what the present codes are they seem to change with different mechanics.

SCORGE

What codes?

techrep

iTrader: (1)

Yeah.. DTC’s would help

Yoko

[QUOTE=SCORGE;5549525]What codes?[/QUOTE

Here are the codes.

P0132 High voltage bank 1 sensor sensor1
P0446 Evap
P0191 Fuel rail pressure sensor range performance

techrep

iTrader: (1)

Evap purge solenoid can cause those issues and the fuel rail pressure sensor