Year of Manufacture *: 1999
Engine Size and Code *: 2.5 Diesel WL-T
( Optional ) Scanner Used: G-Scan
( Optional) Fault Codes: P0400 + P1228
I hooked up the scan tool and read the codes. P0400 (EGR recirculation A flow) and P1228 (Wastegate Failed open under pressure) both stored and if cleared the P0400 comes back first then the P1228. I think the P1228 is a result of the P0400.
I have removed and cleaned both EGR valves (there are two on this engine). I have blown through the EGR cooler and pipes going to the exhaust manifold all seem clear. I have cleaned out the pipe from the EGR valve to the inlet manifold and a section of the inlet runner that the EGR pipe fits to. I have checked the operation of the EGR solenoids and all look to be working correctly. The funny thing is I cant seem to find how the EGR is monitored for flow. One of the valves has a position feedback which is working just fine. What is really strange thing with the vehicle is that if I actuate both EGR valves when the engine is cold it will kill the engine with about -0.3bar of vac. When the engine is hot give both valves full vac and the engine will idle just fine as though the EGR is not working. If the pipe coming from the EGR valves is removed and the valves operated exhaust gasses flow when the engine is hot or cold.
I believe this is the same engine as the Ford Ranger so I hope that someone can help with this one.
Cheers Matt
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