Truck started missing under a load
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Joined: Jan 2006
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From: North Central Washington
Truck started missing under a load
So I took my first road trip with camper and enclosed trailer this weekend. I first noticed the miss on a back country road 35 to 40 mph in drive probably in OD, apply light throttle and it would miss. The road was rough and curvy couldn't do a lot of testing. On my way home going through a small town 40 to 45 mph for about three miles, applied light throttle again to get back up to 60 or better it would miss even after I got back up to speed, 65 mph. I took it out of OD and throttled it up for a bit and that seemed to clear it up, at least at highway speeds. The rest of the trip home it seemed fine, but I didn't have any more cruising at 40 mph.
P.S. I had it in the 25hp tow mode, I did switch to the other modes when it was missing but no change.
Tim
P.S. I had it in the 25hp tow mode, I did switch to the other modes when it was missing but no change.
Tim
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From: North Central Washington
No, it did not set a any codes. I never really examined the harnesses but that was my first thought. If the harness was bad would it be some what intermittent like that?
I could not duplicate the problem climbing the hill to my house, 35 mph light throttle but kind of a steep hill so really more of a load and only short spurts because of the sharp turns.
I could not duplicate the problem climbing the hill to my house, 35 mph light throttle but kind of a steep hill so really more of a load and only short spurts because of the sharp turns.
Hotshot
Joined: Feb 2009
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From: Plankinton, SD
I'm sure you could check them with a multimeter, I'm just not smart enough to tell you how. Me and the electrical part of these trucks are still trying to learn how to get along.
I'd just unplug them and visually check what you can see. Look close, and you need to check the under valve cover harnesses too.
Maybe someone else can tell you how to test them.
I'd just unplug them and visually check what you can see. Look close, and you need to check the under valve cover harnesses too. Maybe someone else can tell you how to test them.
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Tuned
Joined: Oct 2006
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From: Broken Arrow, Oklahoma
Quickest way to check valve cover harnesses is unhook the connectors and see if they are burnt. You can also smell them to see if they have the electical smell to them. If they dont it could possibly be under the valve cover that is burnt. If they arent burnt your good to go. Mine started intermittant at idle then went to full a full miss. I had one on the outside burnt and one on the inside burnt.
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FTE Chapter Leader
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From: North Central Washington
OK I just checked all of the connections at the valve covers both outside the covers and under, no sign of any burning or bad connections.
I will test drive the truck tomorrow or the next day and see if it still misses when I am at slow cruse mode again. After thinking about it for a bit I guess it's not really under a load.
Anything else I should check?
I will test drive the truck tomorrow or the next day and see if it still misses when I am at slow cruse mode again. After thinking about it for a bit I guess it's not really under a load.
Anything else I should check?
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From: North Central Washington
Well I bought an AeroForce Scan Gauge from Clay at Riffraff, Thanks Man.
I did a quick on the seat install of the gauge tonight, so I could read the codes.
I don't think the codes have anything to do with the recent miss that I experienced last weekend, not sure about the P0603 though. I think they were all set I while back when I did a quick WOT run. Anyway here is what I had.
P0603 Internal Control Module KAM Error
P0344 CMP Sensor Circuit Intermittent
P0236 Turbo Boost Sensor A Circuit Performance
I took it out for a test drive after playing with my new Scan Gauge for a bit, I could not duplicate the miss. I don't know what to think unless it had something to do with the standing codes.
I did a quick on the seat install of the gauge tonight, so I could read the codes.
I don't think the codes have anything to do with the recent miss that I experienced last weekend, not sure about the P0603 though. I think they were all set I while back when I did a quick WOT run. Anyway here is what I had.
P0603 Internal Control Module KAM Error
P0344 CMP Sensor Circuit Intermittent
P0236 Turbo Boost Sensor A Circuit Performance
I took it out for a test drive after playing with my new Scan Gauge for a bit, I could not duplicate the miss. I don't know what to think unless it had something to do with the standing codes.
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Tim,
Are you driving/testing it now with the camper and trailer, too?
Are you driving/testing it now with the camper and trailer, too?
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Hotshot
Joined: Feb 2009
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From: Plankinton, SD
Tim, what do you have for a cam sensor? 0344 is cam sensor related. Have you inspected the wiring to the cam sensor? There has been chafing of the wiring before, could cause what you noticed I would think.
0603 is just from batteries being unhooked more than likely
What color of map sensor do you have? Does your truck build boost like it should? 0236 can be related to the map, but if you're boosting well I wouldn't worry about it. I had that same code recently on a hard run with the trailer and the truck runs just fine
0603 is just from batteries being unhooked more than likely
What color of map sensor do you have? Does your truck build boost like it should? 0236 can be related to the map, but if you're boosting well I wouldn't worry about it. I had that same code recently on a hard run with the trailer and the truck runs just fine
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FTE Chapter Leader
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From: North Central Washington
Jim, Last night I just had a camper on I would guess the trailer only weighed about 2000 Lbs the way I had it loaded. When I did the WOT run a while back I had no camper or trailer. Like I said in an earlier post I shouldn't have titled this thread under a load because the truck was loaded but I was cruising through a small town between 40 and 45 mph for about 3 miles when it started missing.
Darin, I don't know about the cam sensor, I would assume stock. How can I tell? I haven't seen any chafing on anything but haven't examined the leads to the cam sensor in particular.
The map sensor is black. It builds boost just fine, I don't see anything odd there.
Darin, I don't know about the cam sensor, I would assume stock. How can I tell? I haven't seen any chafing on anything but haven't examined the leads to the cam sensor in particular.
The map sensor is black. It builds boost just fine, I don't see anything odd there.
Hotshot
Joined: Feb 2009
Posts: 10,408
Likes: 75
From: Plankinton, SD
If you've never changed the cam sensor, they was a recall a couple years back on them. Even if it has been replaced, the one from ford they used on the recall was a light gray and a piece of ____ anyway. I'd get a new one from ford or IH, or call clay and get a black one. The one clay has is supposed to be real good, but costs more I think. The one I run is from IH, my spare is a ford one. Dark gray with a purple oring. Seems to work good and quite a few run this one too. I'll give you part numbers if you want to try one, only about 25 bucks.
Ford F4TZ-12K073-C
IH 1876736C91
http://api.viglink.com/api/click?for...20Stroke%20FAQ
Here is a link on the map sensor, looks like the black one is the bad one, but if its working ok, I'm not really sure what to tell you. I think the only way to tell if its bad is unhook the elec. connection and take it for a drive, if it runs better, its bad.
Ford F4TZ-12K073-C
IH 1876736C91
http://api.viglink.com/api/click?for...20Stroke%20FAQ
Here is a link on the map sensor, looks like the black one is the bad one, but if its working ok, I'm not really sure what to tell you. I think the only way to tell if its bad is unhook the elec. connection and take it for a drive, if it runs better, its bad.