Oil pressure drops at idle - Dakota Durango Forum
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post #1 of 57 Old 03-13-2008, 02:32 AM Thread Starter
FullboreDakota
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Oil pressure drops at idle

I have my truck running and idleing now after I put on some ported heads, 4bbl intake, 4bbl throttle body, fuel injectors, and some roller rockers. The truck idles decent at around 800rpms. When I start it up, the oil pressure goes up like normal, but after about 5 seconds, it drops to zero and the "check gauge" light comes on. I can rev it up and the oil pressure will go back up to where it should be, but when it goes back to idle, it drops again. The oil is at the normal level, but I am getting ready to change it again, along with the filter. What are some things that would cause this?

Also, I dont have my valve covers completely bolted down, only 3 or 4 bolts on each cover. Would this cause the oil pressure to drop at idle?

1999 Dakota r/t
380hp crate, 4bbl M1, 1000cfm mopar 4bbl tb, 24lb fms injectors, SplitSec VC2, 3.5" magnaflow, Paxton Novi-2000, Vortech FMU, ShadyDell Edelbrock stage 3, 4.56 gears, ASP crank pulley, Black Magic 180, viper 3000 stall, PPH headers, Detroit TruTrac + more.
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post #2 of 57 Old 03-13-2008, 02:37 AM
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Valve covers are not the problem here! I am thinking maybe the valve train somewhere isn't correct something loose or missing in an oil gally??? What year truck is it?

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post #3 of 57 Old 03-13-2008, 02:38 AM Thread Starter
FullboreDakota
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Its a 1999

1999 Dakota r/t
380hp crate, 4bbl M1, 1000cfm mopar 4bbl tb, 24lb fms injectors, SplitSec VC2, 3.5" magnaflow, Paxton Novi-2000, Vortech FMU, ShadyDell Edelbrock stage 3, 4.56 gears, ASP crank pulley, Black Magic 180, viper 3000 stall, PPH headers, Detroit TruTrac + more.
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post #4 of 57 Old 03-13-2008, 02:42 AM
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Look at your sending unit first.
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post #5 of 57 Old 03-13-2008, 02:45 AM Thread Starter
FullboreDakota
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Should I take it out to see if its clogged or what? I have a "T" on it for the paxton oil line and its flowing oil pretty good. The sensor is plugged in and everything , could it possibly be going out?

1999 Dakota r/t
380hp crate, 4bbl M1, 1000cfm mopar 4bbl tb, 24lb fms injectors, SplitSec VC2, 3.5" magnaflow, Paxton Novi-2000, Vortech FMU, ShadyDell Edelbrock stage 3, 4.56 gears, ASP crank pulley, Black Magic 180, viper 3000 stall, PPH headers, Detroit TruTrac + more.
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post #6 of 57 Old 03-13-2008, 02:48 AM
Dakudaman
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Yes it could be that simple too! Slap a new one in there for $15 and and then you know for sure before a bigger teardown!

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post #7 of 57 Old 03-13-2008, 04:41 AM
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I don't see where you messed with the cam or lifters so I'll assume they are the way they were before other stated parts were installed.I had this happen on mine and I checked the oil pressure with a mechanical oil pressure gauge,oil pressure was fine.So I replaced the sending unit and oil filter at same time and the problem was solved.So I would try the filter since you need an oil change anyway and replace the sedning unit since yours is prolly the factory unit anyway.


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post #8 of 57 Old 03-13-2008, 04:50 AM Thread Starter
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Yeah the cam and lifters are the same. I will change the sending unit and the oil/filter and see if the problem goes away. Thanks

1999 Dakota r/t
380hp crate, 4bbl M1, 1000cfm mopar 4bbl tb, 24lb fms injectors, SplitSec VC2, 3.5" magnaflow, Paxton Novi-2000, Vortech FMU, ShadyDell Edelbrock stage 3, 4.56 gears, ASP crank pulley, Black Magic 180, viper 3000 stall, PPH headers, Detroit TruTrac + more.
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post #9 of 57 Old 03-14-2008, 12:14 AM Thread Starter
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Well i went to change the oil filter and it is pretty much stuck on there. The filter just crushes instead of turning loose. Its a mobil-1 filter and I just put it on about 300 miles earlier. Anybody have any tricks to getting a stuck oil filter off?

1999 Dakota r/t
380hp crate, 4bbl M1, 1000cfm mopar 4bbl tb, 24lb fms injectors, SplitSec VC2, 3.5" magnaflow, Paxton Novi-2000, Vortech FMU, ShadyDell Edelbrock stage 3, 4.56 gears, ASP crank pulley, Black Magic 180, viper 3000 stall, PPH headers, Detroit TruTrac + more.
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post #10 of 57 Old 03-14-2008, 01:16 AM
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Usually, you just have to wrench on the filter to get it off, sounds like you may have overtightened it when installing or didn't lube the gasket. I've had the samething happen in the past, and it was a bithc to remove it.

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post #11 of 57 Old 03-14-2008, 01:29 AM Thread Starter
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Yeah i probably overtightened it, I guess I will just have to keep trying.

1999 Dakota r/t
380hp crate, 4bbl M1, 1000cfm mopar 4bbl tb, 24lb fms injectors, SplitSec VC2, 3.5" magnaflow, Paxton Novi-2000, Vortech FMU, ShadyDell Edelbrock stage 3, 4.56 gears, ASP crank pulley, Black Magic 180, viper 3000 stall, PPH headers, Detroit TruTrac + more.
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post #12 of 57 Old 03-14-2008, 05:05 AM
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a trick for removing really badly stuck oil filters is to take a screwdriver and hammer it through the side of the filter and use it as a handle to turn the filter, gives you a lot more leverage then a normal filter wrench and who cares about the filter when yer replacing it anyway..
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post #13 of 57 Old 03-14-2008, 01:25 PM
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Or just hand tighten it instead being fucking He-Man when you put it on...
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post #14 of 57 Old 03-14-2008, 06:07 PM Thread Starter
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Yeah I was on my daily roid rage, so maybe next time I will lay off the steroids for the day.

1999 Dakota r/t
380hp crate, 4bbl M1, 1000cfm mopar 4bbl tb, 24lb fms injectors, SplitSec VC2, 3.5" magnaflow, Paxton Novi-2000, Vortech FMU, ShadyDell Edelbrock stage 3, 4.56 gears, ASP crank pulley, Black Magic 180, viper 3000 stall, PPH headers, Detroit TruTrac + more.
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post #15 of 57 Old 03-14-2008, 08:44 PM
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haha, i always hated that when i would do someone a favor by changing their oil for them and they had gone to the local jiffy lube last time where they seem to import the largest gorillas they can get their hands on just to install oil filters.
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