Erratic Start (Rough idle)
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Freshman User
Joined: Oct 2004
Posts: 44
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Erratic Start (Rough idle)
I have been having this problem for a little while now. When I start the truck for the first time in the day the rpm's jump from almost stall to normal idle. It doesn't matter if it is warm or cold (although gets way worse in the cold - block heater helps). If I keep my foot on the pedal slightly it goes away. I can start it again 5 hours later and starts like a dream. Wait to start light stays on for about 10 secs. regardless of outside temperature. Glow plug relay and glow plugs (read with volt meter 0.6 ohms each) both seem to be good.
Any thoughts?
Thanks in advance.
Any thoughts?
Thanks in advance.
Post Fiend
Joined: Apr 2007
Posts: 7,241
Likes: 1
From: Powder Springs, East TN
Rough start video by cob32187 - Photobucket This is the romps and what you ahve it seems like
I run Schaeffers 9000 5w40 and that pretty much fixed my romps.
I run Schaeffers 9000 5w40 and that pretty much fixed my romps.
Post Fiend
Joined: Apr 2007
Posts: 7,241
Likes: 1
From: Powder Springs, East TN
Thats the only cure the oil is just so thick to flow though the HPOP, oil rails, injectors its just really a mess since these trucks are powered by the HEUI system that runs off of oil.
Post Fiend
Joined: Mar 2007
Posts: 26,966
Likes: 50
From: Texas
You can try to find a lighter weight dino oil that has better cold flow properties, but you have to make sure it's diesel rated and has the proper anti-foaming additives. The down side to this is you need to change it as soon as the weather warms back up, regardless of the mileage on the oil. The synthetic can be run year around, so you don't have to worry about the temps. There's nothing wrong with running synthetic in the winter and regular dino oil in the summer.
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tpolley
Pre-Power Stroke Diesel (7.3L IDI & 6.9L)
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Dec 9, 2009 09:47 PM
