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Author Topic: Truck behaving strangely; ideas?  (Read 5454 times)

Brad Johnson

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Re: Truck behaving strangely; ideas?
« Reply #25 on: September 10, 2009, 02:46:50 PM »
Another vote for going to the local AutoMegaStore. They will pull codes for free. Once you have the code you can start homing in on the problem.

Brad
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Jim147

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Re: Truck behaving strangely; ideas?
« Reply #26 on: September 10, 2009, 03:01:41 PM »
Since it seems to be running now in the cold loop, that takes a few things off the list but adds several more.
So yea, it sounds like it's time to get the codes out of it.

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Balog

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Re: Truck behaving strangely; ideas?
« Reply #27 on: September 10, 2009, 04:19:49 PM »
Quote from: Jim147 on September 10, 2009, 10:24:36 AM
Just a thought did you try restarting the truck when you couldn't get a code out of it?
A soft code may not of set.

The front O2 sensor is not to bad. Buy the correct socket for it and hit it with some Liquid Wrench or something first.

A code scanner and a half dozen VOhm meters are things I find it hard to live without.

Run a quick check on all the hoses and wires you can find to make sure nothing has broken or come loose.

jim

Why do you need 6 meters?
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Firethorn

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Re: Truck behaving strangely; ideas?
« Reply #28 on: September 10, 2009, 04:21:07 PM »
Quote from: Balog on September 10, 2009, 04:19:49 PM
Why do you need 6 meters?

Presumably so you can monitor multiple sensors at the same time?
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Balog

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Re: Truck behaving strangely; ideas?
« Reply #29 on: September 10, 2009, 04:25:30 PM »
You use volt-ohm meters to monitor sensors?
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Jim147

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Re: Truck behaving strangely; ideas?
« Reply #30 on: September 10, 2009, 04:33:22 PM »
Quote
Why do you need 6 meters?

I figure two is one and one is none. So with six I should have one that works when I need it.
I have a small pocket unit with my computer tools, a large bench unit on my bench, an analog with amp clamp in my office, I have one in the garage and one in each of my tool bags.

Sensors can be checked with a meter if you have the ohm specs and or low voltage readings for each sensor.

jim
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BrokenPaw

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Re: Truck behaving strangely; ideas?
« Reply #31 on: September 10, 2009, 06:54:55 PM »
Ok, I decided that with an 11-year-old truck, I'll probably end up needing a scanner again, so I just bought one.

The truck is throwing three codes:

P0545 - Exhaust Gas Temperature Sensor Circuit Low Bank 1 Sensor 1
P0320 - Ignition/Distributor Engine Speed Input Circuit
P1391 - Intermittent Loss of Cam or Crankshaft Position Sensor

I'm guessing that the exhaust temperature one is more a result of the others than an actual problem in and of itself.

Suggestions on the 'net say that need to check and see if the distributor rotor is loose, and to check the cam sensor in the distributor, as well as checking that the crank sensor isn't loose.

I know where the distributor cap is, so I can check that.  Now all I have to do is figure out where the crank sensor is.  If I can remember where my Haynes book is, I can probably noodle it out.

Does any of this make sense with regard to the fact that it seems to run better in the cold loop?

Thanks,
-BP
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drewtam

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Re: Truck behaving strangely; ideas?
« Reply #32 on: September 10, 2009, 07:11:56 PM »
hmmm, seems like I lost this one.
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Jim147

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Re: Truck behaving strangely; ideas?
« Reply #33 on: September 10, 2009, 07:18:34 PM »
The CPS or crankshaft position sensor could be breaking down when hot.
If it is cam position sensor I think this is read from the distributor and spark plugs not a real sensor.
I'll go back to a loose pickup plate on in the distributor as something to look at.
When you pull the cap you see the rotor. Under the rotor is another shield. Pull it off and you should see the pickup.

If you can find your book you should be well on your way to getting it fixed. If you have anymore questions don't hesitate to post them.

jim

Quote from: drewtam on September 10, 2009, 07:11:56 PM
hmmm, seems like I lost this one.

Not a loss if we are all just throwing out ideas. Hopefully it gets it fixed.
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Brad Johnson

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Re: Truck behaving strangely; ideas?
« Reply #34 on: September 10, 2009, 07:36:13 PM »
Quote
P0545 - Exhaust Gas Temperature Sensor Circuit Low Bank 1 Sensor 1
P0320 - Ignition/Distributor Engine Speed Input Circuit
P1391 - Intermittent Loss of Cam or Crankshaft Position Sensor

I think the EGT and ignition issue are the result of cam/crank sensor problem. Check the cam sensor first. If yours is in the distrubutor cap then it's the easiest to access.

If that doesn't work go for the crank sensor. I think the Dakota's are relatively easy to access (IIRC they are right behind the harmonic balancer). Being down in the mud, slush, and grit, it's surprising they last as long as they do.

In either case I think the sensors are user-replaceable with little more than hand tools.

Brad
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Re: Truck behaving strangely; ideas?
« Reply #35 on: September 11, 2009, 10:50:11 AM »
I wasn't able to get the distributor cap off it last night; it's right back in a place where it's difficult to get a screwdriver and any leverage.  The screws didn't seem to want to come out, and I didn't have anything handy to loosen them up.

Need to pick up some Liquid Wrench and have another go.
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Jim147

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Re: Truck behaving strangely; ideas?
« Reply #36 on: September 12, 2009, 10:53:05 AM »
If I remember correctly, the screw head is also a bolt head. 7mm I think. If you have a 1/4 drive set it might work better then a screwdriver.

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Re: Truck behaving strangely; ideas?
« Reply #37 on: September 12, 2009, 03:14:15 PM »
I must have to mention my car tip of the day again.


Try removing the radiator cap and replacing the car underneath it.
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BrokenPaw

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Re: Truck behaving strangely; ideas?
« Reply #38 on: September 12, 2009, 06:39:43 PM »
Quote from: Jim147 on September 12, 2009, 10:53:05 AM
If I remember correctly, the screw head is also a bolt head. 7mm I think. If you have a 1/4 drive set it might work better then a screwdriver.

It is a bolt head; good call.  It looks smaller than 7mm to me, but I could be wrong.  I'll have to see if I have any better luck with nut drivers than I did with the screwdriver.
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