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  #1  
Old 08-12-2010, 08:30 PM
Ape Ape is offline
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Default My truck has the studders

Edit: Subject is evidence of my exhaustion. Put truck in there somewhere

Well sort of, more of a jerking. I've searched but haven't turned up anything so far lots of close but not close enough.

So best way I can put it is on start up the idle is rough and you have to tap the gas to get it smooth. Then ya start down the drive, it sounds good whatever. Hit the road and it start to jerk or studder real bad mainly threw 1st and half of 2nd then at 45 it gets worse. I'm barely able to get to 55. But after about 20 minutes of driving it runs great and will all day until it sits for more than 3-4 hours and it will start all over again.

I've replace the:
Fuel Screen
Fuel Pump
Idle Control Sensor/valve
Temp sensor (the one that tells the computer whats up)
Air filter
Rebuilt the rear end (6 months ago)

I've tried:
Greasing the slip yoke
Cleaned out the fuel lines with seafoam
Add to tank injector cleaner

Theres no Check Engine light, brought it to Ford and no errors came up. Tried tranny honey. Ford says prob bad rings but their going off the I-D-10T manuals. I'm fed up but hoping ya'll can help!

Thanks,
Brian
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2000 Ranger XLT
-4.0L OHV
-Auto
-8.8 rear end
-Rare chicken shit smell option

Last edited by 01_ranger_4x4; 08-13-2010 at 02:12 AM. Reason: fixed title
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  #2  
Old 08-12-2010, 11:01 PM
mickblock mickblock is offline
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Default Re: My has the studders

Quote:
Originally Posted by Ape View Post
Edit: Subject is evidence of my exhaustion. Put truck in there somewhere
Tried to fix the subject title but I don't think i did any better than you did. It's hard.

Quote:
Ford says prob bad rings but their going off the I-D-10T manuals.
I can understand arriving at that, being that no DTC's accompany the condition, although the problem completely goes away when it's warm, but did they physically verify that with a (simple fucking) compression test!?

After it's warmed up, which as you know is when closed loop happens, so the PCM could be compensating for X condition, but within range so it's not posting DTC s. No pending codes either? A live data reading sure would help. I wonder if Autozone's big ass orange scanners have that capability. That way you could check stuff like ignition timing and ST/LT fuel trim and see if that stuff is approaching out of limit thresholds.
Anyway perhaps forget DTC s it might just be back to Air, Fuel and Spark with this badboy.

You don't include;
spark plugs/verify gap
plug wires/verify resistance within specification
fuel filter
in your list. More exhaustion?

Anyhow this all assumes it's in the engine. Let's see what others have to say.

And oh yeah What year and what engine is in your truck?
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Last edited by mickblock; 08-12-2010 at 11:05 PM.
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  #3  
Old 08-13-2010, 08:37 AM
Ape Ape is offline
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Default Re: My has the studders

Quote:
Originally Posted by mickblock View Post
but did they physically verify that with a (simple fucking) compression test!?

After it's warmed up, which as you know is when closed loop happens, so the PCM could be compensating for X condition, but within range so it's not posting DTC s. No pending codes either? A live data reading sure would help. I wonder if Autozone's big ass orange scanners have that capability. That way you could check stuff like ignition timing and ST/LT fuel trim and see if that stuff is approaching out of limit thresholds.
Anyway perhaps forget DTC s it might just be back to Air, Fuel and Spark with this badboy.

You don't include;
spark plugs/verify gap
plug wires/verify resistance within specification
fuel filter
in your list. More exhaustion?

Anyhow this all assumes it's in the engine. Let's see what others have to say.

And oh yeah What year and what engine is in your truck?
I did a compression test last weekend and it was around 125 across the board. And I did replace the filter same day as the pump, I guess I shoulda waited till morning to post! But I pulled the plugs they all looked good and reset the gap on one, the rest where good. As for the wires I didn't have the meter to test'em so I just bought new ones.

Autozones tester can't test timing I tried to get them too but nadda. Either the girl (young) didn't know anything or their meter sucks.

But my truck is a 2000 with the 4.0 OHV. On that note I've never been able to find out if I have hydraulic lifters or solid. Not important unless someone thinks the valvetrain is to blame.

Thanks,
Brian
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-Auto
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-Rare chicken shit smell option
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  #4  
Old 08-16-2010, 03:37 PM
Ape Ape is offline
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Default Re: My truck has the studders

bump?

I haven't come up with anything other than it started when I replaced the serpentine belt with one that was really tight Wouldn't think it would matter in this way but wouldn't be suprised...
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  #5  
Old 08-16-2010, 03:46 PM
01_ranger_4x4 01_ranger_4x4 is offline
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Default Re: My truck has the studders

when you changed youre belt did you by chance unplug the MAF? double check that its plugged in and if it is try cleaning. there is a write up in the how to section here about that. it seems as though youve checked/ replaced everything else except for that. one more thing to try is while its running, lightly tap the MAF housing with a screw driver handle or something and if the idle changes or it cuts out at all than you MAF might be crapping out. its worth checking considering youve tried everything else already. lol '

PS. fixed youre title for you.
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-RCD Suspension lift
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-James Duff traction bars
-Headers
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-SCT X-Cal2 and some small exterior mods

http://www.cardomain.com/ride/2321189

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  #6  
Old 08-16-2010, 04:05 PM
Ape Ape is offline
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Default Re: My truck has the studders

Not a bad idea I'll try it in a second and thanks for fixing the subject, "My has the studders" was just setting myself up!
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  #7  
Old 08-16-2010, 04:31 PM
Ape Ape is offline
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Default Re: My truck has the studders

All the wires where in place and gave tapping the MAF but it didn't do anything. I unplugged it while running and when I plugged it back in the rpms went real low then back to normal. Figured that meant the MAF was doing its job. Gonna get MAF cleaner tomorrow and try cleaning it though.
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-4.0L OHV
-Auto
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-Rare chicken shit smell option
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  #8  
Old 08-16-2010, 04:43 PM
01_ranger_4x4 01_ranger_4x4 is offline
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Default Re: My truck has the studders

Quote:
Originally Posted by Ape View Post
All the wires where in place and gave tapping the MAF but it didn't do anything. I unplugged it while running and when I plugged it back in the rpms went real low then back to normal. Figured that meant the MAF was doing its job. Gonna get MAF cleaner tomorrow and try cleaning it though.
well thats good but that just means its back to the drawing board. im out of ideas now. besides a mechanical problem i couldnt guess what the issue might be now.
__________________
2001 Ranger 4x4 Stepside
-RCD Suspension lift
-33x12.5 BFG KM2's on Mickey Thomson classic locks
-4:56 gears
-Auburn gear LS
-James Duff traction bars
-Headers
-Flowmaster duals
-SCT X-Cal2 and some small exterior mods

http://www.cardomain.com/ride/2321189

2005 F-150 Lariat 4x4
-LED third brake light
-Weathertech floor liners
-Edge tuner
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  #9  
Old 08-16-2010, 06:16 PM
wvcat wvcat is offline
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Default Re: My truck has the studders

I think its electrical, but not sure what. I would get a good manual and start by checking the coil, TPS, IAC, MAP, Cam sensor, and CPS. Obviously whatever it is has to get hot before it starts working right. I would try to run codes even if you don't have a light, it could be burned out.
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  #10  
Old 08-16-2010, 07:33 PM
1994rangerdude 1994rangerdude is offline
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Default Re: My truck has the studders

the same problem is happening on my 94 but on the 94 you are able to do dianostic tests with just a ohm meter and it ended up being a problem with my MAF sensor
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  #11  
Old 08-16-2010, 08:29 PM
mickblock mickblock is offline
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Default Re: My truck has the studders

Since this is turning out to be a possible electrical gremlin I'll throw this in

Technical Service Bulletin 2000-2001 Ranger electrical connector
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  #12  
Old 08-17-2010, 10:40 AM
Ape Ape is offline
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Default Re: My truck has the studders

Jesus my truck has been hanging around the wife to much.. She's getting way to confusing... After messing with the MAF sensor last night I took it for a drive and it ran ok then left for the doc's office this morning and had zero issues.. No idea whats going on now. I still picked up some MAF cleaner and gave it a good cleaning, also grabbed some electrical connector cleaner and cleaned up the connection mickblock posted about and covered it with heat shrink.

We'll see if the problem has been fixed or not over the next couple of days.

Thanks
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2000 Ranger XLT
-4.0L OHV
-Auto
-8.8 rear end
-Rare chicken shit smell option
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  #13  
Old 08-17-2010, 04:37 PM
mickblock mickblock is offline
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Default Re: My truck has the studders

Good stuff. But I had a feeling that it was the MAF sensor connection as soon as it was suggested and just made that other post as backup JIC.. Does it still click-lock?
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  #14  
Old 08-17-2010, 06:09 PM
Ape Ape is offline
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Default Re: My truck has the studders

Actually I was able to save it, First time on this truck! So I awarded myself with a Abita Amber, hot damn!!
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-4.0L OHV
-Auto
-8.8 rear end
-Rare chicken shit smell option
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  #15  
Old 08-22-2010, 02:15 PM
Ape Ape is offline
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Default Re: My truck has the studders

Just an update for any future searchers.

Cleaned my MAF up real nice and she runs good. Not perfect but useable. Pretty sure my problem now is transmission related. But just plan on running it for now I don't have much time to work on it since I'm a new father and all!! Woot! Had a 7lb 5oz baby boy on the 18th!

Jack Brown
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-4.0L OHV
-Auto
-8.8 rear end
-Rare chicken shit smell option
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