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Ahhhh ford tech on ck5

cabledawg

cabledawg

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Hey, I have a 00 Lincoln Navigator and recently she's developed a shutter at partial throttle, usually from 40-60mph. Checked the fluid, was low, but looked good otherwise. Added a quart and thought that fixed it. But once the engine and trans get warmed up, it starts acting up. This truck has auto 4wd with a switch for manual override and low range. I thought maybe the auto 4wd was kicking in and out so I locked it in 4wd while driving but it only seems to lessen the shutter.

There is no jump in the speedo or the tach when it shutters, so I'm not 100% whether its the tranny or the engine, but I do know that I dont know what it is and I dont feel like taking it to a shop only to find out it was something simple. So what do the experts say?
 
Just a real wild ass guess, it sounds like your shudder is an engine miss.
I don't remember if that year has a lockup converter or not. If it does that will cause what you describe.

If you have access to a box, see if you can pull any codes.
There is probably a way to pull the codes without a code reader, but all my stuff is for earlier rides.

Maybe someone else will chime in.
 
I thought the same thing with the converter, but wouldnt that make the tach jump? Come to think of it, an engine miss would too. Or maybe this tach doesnt respond as fast as the ones in my Burbs.

There was an engine code on there since I bought this last January, but that was for the temp sensor (basically the engine couldnt warm up due to a bad t-stat). I'll check it again to see if something new came up.

Local O'Reilly's has a box they loan out for parking lot code checks, so I'll hit them up next time I'm in town. :waytogo:
 
Fordum said:
Just a real wild ass guess, it sounds like your shudder is an engine miss.
I don't remember if that year has a lockup converter or not. If it does that will cause what you describe.

If you have access to a box, see if you can pull any codes.
There is probably a way to pull the codes without a code reader, but all my stuff is for earlier rides.

Maybe someone else will chime in.
Click to expand...

Could the miss be caused by a bad spark plug or coil? some newer cars have a coil for each plug IIRC. Total shot in the dark but i thought id try :popcorn:
 
I linked to a couple other forums and that seems to be the concesus. The thing I'm not sure of is how I'm going to find which one is bad. According to one source, if the Check Engine light is on, and one of the codes is for the ignition coil, then it should also give me which cylinder is bad. But if there is no code for the ignition, I'll have to take it to a shop for a full diagnostic check. There is some feature on a full diagnostic machine that will tell them which cylinder is bad without a code being thrown. Mode 6 or something like that.

I'll check in with OReilly's first, then go from there.
 
Yea Mode$06 is super handy for seeing which sylinder is misfiring most. If you have any P030X codes great find out which it is, the X will indicate which cylinder is misfiring. Easy enough to move the coil from the misfiring cylinder to another and move the spark plug to a different cylinder , and note where you swapped them to.Drive it til she acts up, if you have access to a quality scanner, you will want to get to generic functions - Mode$06- testID 53, the component IDs will be for each cylinder. It will give you a max value min value and current value. As long as the numbers arent divisable by eachother by 2 then the its an actual misfire value.Example:512min value, max valueN/a and current value at 1024 are computer generated values and dont mean much until a real actual value has been set.

Most scanners will not display mode$06 data

Misfires also are more prevelant when lockup is achieved and at the speed you are describing your likely in lockup.

Motorcraftservice.com is a good resource for OBD-2 vehicles, and Mode$06 information. Look at OBD-2 theory and operation
 
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My question is how many miles are on it. If you have high miles it might be time to change all the plugs if you haven't done that already. I would start with that and see if the miss goes away with that, if not then I would look into which coil is bad and causing the miss.
 
170K and we've had it since Jan this year. I was told the dealership had done a tuneup before we got it, but I wouldnt trust that.
 
Yeah they might have they might not have. If they did all they changed were the plugs and not the coils. Pull a plug out and see what it looks like and check the gap. I've seen guys just put them in without checking the gap and that coud also cause a miss fire. If the gaps not right I would pull them all and regap them.
 
cabledawg said:
Hey, I have a 00 Lincoln Navigator and recently she's developed a shutter at partial throttle, usually from 40-60mph. Checked the fluid, was low, but looked good otherwise. Added a quart and thought that fixed it. But once the engine and trans get warmed up, it starts acting up. This truck has auto 4wd with a switch for manual override and low range. I thought maybe the auto 4wd was kicking in and out so I locked it in 4wd while driving but it only seems to lessen the shutter.

There is no jump in the speedo or the tach when it shutters, so I'm not 100% whether its the tranny or the engine, but I do know that I dont know what it is and I dont feel like taking it to a shop only to find out it was something simple. So what do the experts say?
Click to expand...

Well yours is a ford but I have the same problem with my 97 chevy van with a 350 vortec and 4l60e, I assumed it's the tranny since the slip yoke was leaking and we drove it a few days till we noticed a big leak in the driveway then we added some ATF and it seemed OK then a few days later it started the shudder, so I took it and got the fluid flushed, it was dark and smelled burnt, and it still did the shudder afterwards.
I did see a check engine light but thought it's not related, I guess I am going to check the codes.:dunno:
 
Well I checked the code. Was for the emissions somethingorother. Basically I checked the gascap, cleared the code and it hasnt come back.

I'm going to try a full tuneup. Spark plugs, air filter, and oil change. This thing is going to be a PITA to change plugs though as I have to disassemble the entire upper half of the intake plenum. Apperantly the Navs have some extra stuff the Ford 5.4's dont. Oh well. No dizzy or plug wires from what I can tell, so if it still has issues with the shudder after this, I'll bite the bullet and take it to a shop.

As for the tuneup, any other recommendations for things to change? This truck has 170k miles but all I've done since last Jan was change the oil and air filter. I dont really want to mess with the trans, but do you guys think the fuel filter should be changed out as well?




On a side note, is there any way to hook up a laptop and run something like WinALDL to see what the engine is doing while driving?

Edit: Found this link on the TBIchips.com site

http://www.aldlcable.com/sc/details.asp?item=obd2usb
 
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Pulling that intake off isn't really to hard. I've changed the plugs on Navs before and it only takes about an hour and half insteed of the three that it calls for.
 
Not sure what year it was,but a Navigator my friend worked on a week ago had some kind of "flaps" on the intake that are operated by cables,and were electronically controlled--one was not working ,and he got another used setup from a salvage yard,and it fixed the problem..the flaps look like a variable vehturi type of thing in the intake,one of the cables had seized up and the "box" they go into evidently croaked electrically..the vehicle was misfiring,lacked power and shuddered under acceleration..it had several engine code faults and had other issues also,sorry I dont know what the codes were or what else he had to replace..
 
Based on my research, it had a Borg Warner 4406 with a low range of 2.64:1.


Not bad for a luxury sport ute :thumb:
 
diesel4me said:
Not sure what year it was,but a Navigator my friend worked on a week ago had some kind of "flaps" on the intake that are operated by cables,and were electronically controlled--one was not working ,and he got another used setup from a salvage yard,and it fixed the problem..the flaps look like a variable vehturi type of thing in the intake,one of the cables had seized up and the "box" they go into evidently croaked electrically..the vehicle was misfiring,lacked power and shuddered under acceleration..it had several engine code faults and had other issues also,sorry I dont know what the codes were or what else he had to replace..
Click to expand...

Mine doesnt lack power, or at least I dont see a difference. Ours has been hard to start since we got it, I just assumed that was from old age. No backfiring though. I'll check the flapper thingy, maybe my Haynes manaul has something about it.
 
I asked my friend about that flapper thing,he said its an emission device,and its probably not related to your symptoms,said the vehicle he fixed had other codes and sensor woes that were causing the engine troubles,said you'd probably never be able to tell if those flappers were working or not driving it,it mostly affects emissions...just another electronically controlled device that does little more than suck more dollars out of your wallet at inspection time...he said he'd be looking at the coils ,they are noted to fail and misfire by letting spark jump to ground or short internally intermittently..sometimes new plugs mask a bad coil temporarily,due to the fact they have lower resistance for some time till they are run for awhile..
 
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