Help with DOD Cam Swap
Help with DOD Cam Swap ok guys im doing a cam and head swap on my 08 5.3 with DOD. i got everything buttoned back up and cranked her up for the first time.... Nothing it fires but wont continue to run... i know that the first and last cylinder on the driver side of the engine are firing because the header primaries are hot after cranking a few time. on the passenger side it is the opposite the middle two primaries are hot and the outer two are cold... any ideas guy ... did the lifter trays get put in wrong.....i will try to trouble shoot it more tommorow after work but thats all i have for know
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ok guys im doing a cam and head swap on my 08 5.3 with DOD. i got everything buttoned back up and cranked her up for the first time.... Nothing it fires but wont continue to run... i know that the first and last cylinder on the driver side of the engine are firing because the header primaries are hot after cranking a few time. on the passenger side it is the opposite the middle two primaries are hot and the outer two are cold... any ideas guy ... did the lifter trays get put in wrong.....i will try to trouble shoot it more tommorow after work but thats all i have for know
What lift is the cam?
??
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Sounds like you have a problem with the valley manifold. If the DOD valley tray isn't plugged in you will only get the four cylinders that have normal lifters to fire. The PCM will shut off any cylinder that the solenoid for the DOD lifters doesn't work on.
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Verdad Gallardo TECH Resident
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It sounds like the problem here may be that the DOD cylinder valves are stuck open (unlikely if there is no backfiring) or stuck closed.
For example if there is considerably oil leakage (been known to happen - the valves are "controlled" leak units) past the DOD solenoid valves, then the Deac lifters may be deactivating the DOD cylinders. It only takes about 15psi to deac them.
At 0.565" lift, this is on the edge of the deac plunger stroke. I dont recall exactly what we measured it at, but that is close.
Ok guys i got it running. the trottle body blade was stuck closed i took it out and lubed it up and polished it up with a dremel tool and it cranked right up... throwing codes p0300, p1516, p2101, p0300 again
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Actually, begging to differ, its the other way around. The ECM needs to energise the DOD solenoids to deactivate the cylinders. It is rather fussy about when it does that (like it needs above a certain level of manifold & brake booster vacuum). If the DOD is not plugged in, DOD/AFM wont work.
It sounds like the problem here may be that the DOD cylinder valves are stuck open (unlikely if there is no backfiring) or stuck closed.
For example if there is considerably oil leakage (been known to happen - the valves are "controlled" leak units) past the DOD solenoid valves, then the Deac lifters may be deactivating the DOD cylinders. It only takes about 15psi to deac them.
At 0.565" lift, this is on the edge of the deac plunger stroke. I dont recall exactly what we measured it at, but that is close.
It sounds like the problem here may be that the DOD cylinder valves are stuck open (unlikely if there is no backfiring) or stuck closed.
For example if there is considerably oil leakage (been known to happen - the valves are "controlled" leak units) past the DOD solenoid valves, then the Deac lifters may be deactivating the DOD cylinders. It only takes about 15psi to deac them.
At 0.565" lift, this is on the edge of the deac plunger stroke. I dont recall exactly what we measured it at, but that is close.
As for the problem at hand, is/was this just a reduced engine power mode problem?
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