Is a little bit rough idle normal. (No codes)
#1
Is a little bit rough idle normal. (No codes)
I have a new Turner engine installed in my 2004 Discovery.
At idle, there is some vibration or stumble, kinda how like a truck would at low rpm or idle. Like I said, there are no check engine lights and power seems real good under acceleration. The motor mounts are brand new so I don't know if that has something to do with it.
Is it normal to have some vibration at idle?
I have a Hawkeye Total, is there anything I can look at to see what is going on?
At idle, there is some vibration or stumble, kinda how like a truck would at low rpm or idle. Like I said, there are no check engine lights and power seems real good under acceleration. The motor mounts are brand new so I don't know if that has something to do with it.
Is it normal to have some vibration at idle?
I have a Hawkeye Total, is there anything I can look at to see what is going on?
Last edited by Jason_B; 10-18-2018 at 09:45 PM.
#3
Join Date: Oct 2016
Location: St. Clair County, Michigan
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I'm supposing you did a tune up while replacing engine...but you don't mention it. So, l'd start with your basic tune up...if that hasn't been done recently. Did you have the injectors cleaned/rebuilt while the engine was being assembled? If not, could be dirty/failed injector(s). Try using an over the counter additive, this may help. Did you clean the throttle body while off? If not, remove air intake hose assembly and clean with throttle body cleaner. Is the air filter new? Check for vacuum leaks, also.
It may take the ECM a while to adapt to the different cam, also. You could give it a couple weeks worth of driving to see if it changes on its own.
Brian.
It may take the ECM a while to adapt to the different cam, also. You could give it a couple weeks worth of driving to see if it changes on its own.
Brian.
Last edited by The Deputy; 10-19-2018 at 02:54 AM.
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Jason_B (10-19-2018)
#4
I'm supposing you did a tune up while replacing engine...but you don't mention it. So, l'd start with your basic tune up...if that hasn't been done recently. Did you have the injectors cleaned/rebuilt while the engine was being assembled? If not, could be dirty/failed injector(s). Try using an over the counter additive, this may help. Did you clean the throttle body while off? If not, remove air intake hose assembly and clean with throttle body cleaner. Is the air filter new? Check for vacuum leaks, also.
It may take the ECM a while to adapt to the different cam, also. You could give it a couple weeks worth of driving to see if it changes on its own.
Brian.
It may take the ECM a while to adapt to the different cam, also. You could give it a couple weeks worth of driving to see if it changes on its own.
Brian.
Just ordered a smoke tester so I will check for vacuum leaks.
Do you think the fuel pump could have anything to do with it. Sometimes when I am cranking the car it takes about 1.5 seconds to start up. On a previous Discovery I had, this was a sign of a failing fuel pump.
How big of a deal is it to pull the injectors and have them cleaned?
Thanks again, your a life saver!
#5
Pulling the injectors means taking off the upper intake manifold at the very least.
Was the oil baffle in the rocker cover cleaned/replaced? If you had a lot of carbon buildup that could have been a contributing factor. Simplest and most reliable option is probably to remove that piece entirely and change to the Fram PCV instead.
Was the oil baffle in the rocker cover cleaned/replaced? If you had a lot of carbon buildup that could have been a contributing factor. Simplest and most reliable option is probably to remove that piece entirely and change to the Fram PCV instead.
#6
Before you pull injectors, run seafo in a tank of gas.
i just diagnosed a rough idle/stall, and I believe it was either clogged air filter, corroded battery posts/terminals or acombo of those.
my Kent 180 Cam has a sort of surging idle, but not rough.
Make sure the upper intake is torqued, and all of the air intake hoses are tight. Could be a small vacuum leak.
i just diagnosed a rough idle/stall, and I believe it was either clogged air filter, corroded battery posts/terminals or acombo of those.
my Kent 180 Cam has a sort of surging idle, but not rough.
Make sure the upper intake is torqued, and all of the air intake hoses are tight. Could be a small vacuum leak.
#7
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Yes, try some injector cleaner first (additive). Just be careful, and do exactly what it says on the directions. More is not better, when it comes to some additives. You can damage your 02 sensors, by overloading the system with additives. If the additive says mix to 15 gallons of fuel, do that. Now, you can do it again...after running the first tank down.
Like l said earlier, add some injector cleaner and drive it for a couple weeks. Give the ECM time to adjust to the new cam and hardware.
Don't get all crazy throwing part after part at it...it could be a bad tank of fuel or dirty fuel injector?
Brian.
Like l said earlier, add some injector cleaner and drive it for a couple weeks. Give the ECM time to adjust to the new cam and hardware.
Don't get all crazy throwing part after part at it...it could be a bad tank of fuel or dirty fuel injector?
Brian.
#9
#10
I had a slight miss at idle on stock spark plugs at 170k miles. I adjusted the spark plug gap to .035 and it was noticeably smoother. I never would have thought but it did help. I searched the local JLR dealer records and no notes on spark plug replacement from previous owner. Maybe that’s why he dumped the car and got a new one.