Rough idle

[The handyman]

I have a 03 ram 1500 5.7 hemi I replace the oil pump with the hv pump and changed all gaskets now that everything is back together it idles rough and stalls unless I pull the brake booster hose off to make a vacuum leak..any ideas? I’ve replaced the throttle body, map sensor, and all 16 spark plugs

 

[EdGs]

Did you do a throttle relearn?

Did you use OE sensors from a reputable source? Amazon and ebay are polluted with counterfeit parts, in counterfeit packaging, too.

Our Rams can be tempermental with aftermarket sensors.

 

[The handyman]

I tried manually relearning it but my scan tool doesn’t have that feature

 

[jws123]

was it fine before the oil pump replacement? what was the reason for replacement. Also what did you take apart to do the job just the oil pan and timing cover? or did you pull intake ect and all that? could be a vacuum leak ect. Another thing to check make sure you put the plug wires back on correctly if you did pull the intake.

 

[The handyman]

It had a tick and I was losing oil pressure. I removed heads to check lifters and timing cover to replace the oil pump but that was about it

 

[jws123]

It had a tick and I was losing oil pressure. I removed heads to check lifters and timing cover to replace the oil pump but that was about it

make sure all of your push rods are in the correct slots very common to accidently put some into the oil drains remove valve covers make sure they all move.

 

[The handyman]

will do