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slight rough idle when hot

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Old 06-22-2016, 11:20 AM
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rjrandy96
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slight rough idle when hot

So I have lots of things done to this motor regulated return 60psi meiling lpop stage 1 cam arp headstuds and since I floated a valve I have new valves and new lifters only on #4 &#8 (thinking this may be my problem only have 600 or so miles since the build) but it's definitely not a misfire or a dead cylinder (my #4 had no valves opening so I know what a dead cylinder is) but it does it only when it's hot when it's cold it's perfect and second you touch the gas it goes completly away I do not have any smoke in the stock tune. And it seems to lose a bit of power (nothing overly crazzy still gets up and goes good just a small noticeable difference like going from 20 tune to stock) and not a warm engine but it has to be hot. My other thought is my hpop could be week and in the next few days IL have acess to a scanner but only for half an hr or so. I wanted a list of things to go over and check so I don't waste my one day off a week
Edit h I almost forgot since the lpop had been installed on wot runs the oil pressure gauge drops to zero (the one on the dash not an actual gauge ) for just a split second but I believe it's because I flow too much oil and it's popping the release valve that I believe is in the system but I do not know for sure that's just what iv been told from someone who had that pump on there truck . It's on stock all ad code injectors
 
  #2  
Old 06-22-2016, 02:34 PM
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Do you have Fordscan? If so run the cylinder contribution test. Also buzz test.

Lots of things could cause your problem.
 
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Old 06-22-2016, 02:44 PM
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Do not have a fords can but have acess to a scanner that will work for that. I was planning on doing those two test and to check icp and ipr% other than that I do not know what else to check.
 
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Old 06-23-2016, 07:47 PM
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Icp at best was 21xonly 510 at idle at cranking it showed 21xx?)
Ipr was 58 at highest
#8 failed buzz test
And it would not perform a contribution test it would just say about to start test. Didnt do anything for 10 min 3 timea ina row.So injectors is no biggy I was going to get 238/100 to go with my stage 1 cam in couple months. As fair as the high pressure oil I'm very confused on the idle and cranking numbers. And why it wouldn't do the contribution test.
 
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