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2000 Dodge Ram 1500 running rough. . . .sometimes.

Posted By: Dustya440

2000 Dodge Ram 1500 running rough. . . .sometimes. - 09/22/10 07:07 PM

I’m hoping someone here can help me.
I have a 2000 Dodge Ram 1500 pick up, 5.9 auto with 200,000 mi. on it.

Recently it has had a tranny rebuilt and the heads redone. The injectors were also cleaned.
It runs like a top most of time. . . . most of time.

Sometimes when I’m driving it, it starts to spit and buck. You can’t accelerate cause it
just pops and has no power.
If I pull over into a parking lot and put it in neutral and rev the heck out of it finally quits
bogging, does a few pops and then acts like nothing ever went wrong.
No lights on the dash ever come on.

It started to do this before I have the heads done along with new ox sensors.

Any ideas?
It’s getting harder and harder to trust the truck.
Posted By: mod381

Re: 2000 Dodge Ram 1500 running rough. . . .sometimes. - 09/23/10 01:04 AM

Does the cat converter rattle,or possibly plugging up?
Posted By: hemigod426

Re: 2000 Dodge Ram 1500 running rough. . . .sometimes. - 09/23/10 01:27 AM

cap/rotor/plugs/wires first, the caps on those have corrosion from rain water cause were they sit
Posted By: DartGTX

Re: 2000 Dodge Ram 1500 running rough. . . .sometimes. - 09/23/10 01:31 AM

Check the dist. bushing in the block and the teeth on the dist. gear
Posted By: challengermike

Re: 2000 Dodge Ram 1500 running rough. . . .sometimes. - 09/23/10 01:38 AM

Could be te crank sensor starting to go.
Posted By: RalleyA12

Re: 2000 Dodge Ram 1500 running rough. . . .sometimes. - 09/23/10 01:42 AM

Quote:

Could be the crank sensor starting to go.



Had that problem with my 2001. Crank sensor fixed it right up.
Posted By: hemigod426

Re: 2000 Dodge Ram 1500 running rough. . . .sometimes. - 09/23/10 01:52 AM

Quote:

Quote:

Could be the crank sensor starting to go.



Had that problem with my 2001. Crank sensor fixed it right up.

his has 200k should have done it. my 2000 and 2001 went at 88k and 95k, still remember that cause both times were in snow storms and plows on,fixed both in lot. if you have a scanner crank sensors mostly fail when trucks hot magnet in sensor has crack and opens up, they radical missfire scanner will show it. truck cools down to ambient temp will run fine till it opens up again with full temp.if not done give it a shot 2 10 mm bolts hold it in by bell flange behind pass head. sucks cause they sieze in from heat
Posted By: GO_Fish

Re: 2000 Dodge Ram 1500 running rough. . . .sometimes. - 09/23/10 03:30 AM

I'd suspect the fuel pump is getting tired. My 5.2 Dak would start missing, usually when 1/4 tank or less. Eventually started missing so badly under load you could not drive it. No warning lights tripped on the dash. Replaced the fuel pump and the problem was gone.
Posted By: Dustya440

Re: 2000 Dodge Ram 1500 running rough. . . .sometimes. - 09/23/10 01:24 PM

The cat doesn't rattle at all. All the miles on the truck are highway miles.
Is there a way to test for a bad cat?

Also, the cap/rotor and wires were replaced less than 1,000 miles ago.
It was all done when the head were placed.

Thanks for the replys so far!!
Posted By: Dustya440

Re: 2000 Dodge Ram 1500 running rough. . . .sometimes. - 09/23/10 01:33 PM

Go Fish,
Did it run good for a long time and then start to miss and sputter and then clear back up for a long time before doing it again?

Also, to all the guys suggesting the crank sensor.
I tihnk I'll go ahead and change that.
If I recall, they are not that expensive.
I hate to keep throwing money into it cause I've already spent so much $ on it.
It been a great truck up to this point.

Thanks again for the suggestions! Mopars coming through again!
Posted By: 71rm23

Re: 2000 Dodge Ram 1500 running rough. . . .sometimes. - 09/23/10 03:15 PM

Dustya440- You said the dash lights didn't come on?
I have a '99 Ram, 5.9. I was pulling a car, ran fine. Pulled into a rest area. When I took off, all of the sudden it started doing this, same thing. The check engine light came on and stayed on. Got it nursed back home and hooked up a scanner, yup, the crank sensor. Yeah, they are relatively cheap but a PITA to get too. Just wondering if it is the crank sensor, why the light didn't come on
Posted By: Dustya440

Re: 2000 Dodge Ram 1500 running rough. . . .sometimes. - 09/23/10 03:35 PM

That's what I was wondering. Why no lights.
Once before the check engine did come on and it was scanned. It showed a bad ox sensor.

So it was replaced but the truck still does the same thing only no light now.
Posted By: RestoRick

Re: 2000 Dodge Ram 1500 running rough. . . .sometimes. - 09/23/10 03:36 PM

I just changed the crank position sensor on my '99 Ram 5.2...
The hex part of the 2 fastening bolts is 13mm.
What will save you aggravation, is knowing that they also have a 1/4" allen socket in the center of the bolt head. Once you break them loose (I used a 1/4" drive rachet), a regular allen wrench gives you a nice clean access to 'em. There's not enough room for the socket to back them out (at least there was stupid tight clearances ). If they're not too tight, you could probably start out with the allen wrench.
The bolts & sensor are on the passenger side bellhousing behind the cylinder head by the trans dipstick tube.

Rick
Posted By: gtx6970

Re: 2000 Dodge Ram 1500 running rough. . . .sometimes. - 09/23/10 03:56 PM

Quote:

Just wondering if it is the crank sensor, why the light didn't come on



The light is just warning device. If the subject sensor / circuit stays within it's designed operating parameters. The light will not come on by design.
Crank sensors operate in a .5 to 4.5 volt range .
IF it goes above or below this voltage scale it's sets a fault and turns on the mil light. It could still have an issue , just not enough to illuminate the mil light.

I personally have never had a crank senser cause a rough idle issue.
Posted By: Scottmon

Re: 2000 Dodge Ram 1500 running rough. . . .sometimes. - 09/23/10 04:10 PM

Hope you didn't replace the O2 sensor with a Bosch...they don't work well in Mopars. NGK made the factory originals and work much better...http://www.sparkplugs.com/more_info.asp?AAIA=1361955&pid=17785

Quote:

That's what I was wondering. Why no lights.
Once before the check engine did come on and it was scanned. It showed a bad ox sensor.

So it was replaced but the truck still does the same thing only no light now.
Posted By: MoparsnMissiles

Re: 2000 Dodge Ram 1500 running rough. . . .sometimes. - 09/23/10 04:12 PM

My 2001 Ram (360) just started doing this exact same thing yesterday. Running just fine, then when stopping at intersection, the truck won't idle worth a crap. Then you can't get it to move again because no power, can't get engine speed up, backfiring like timing is off, engine just seems to be choking itself.

If I shut it down and restart, it seems to run fine again..... for awhile.

Also, no Check Engine lamp (MIL) and no code set on dash display. (Key ON/OFF three times quickly)
Posted By: Scottmon

Re: 2000 Dodge Ram 1500 running rough. . . .sometimes. - 09/23/10 04:15 PM

Yup, generally when the crank sensor goes the motor just quits running. I've had intermittent starting issues with the "cam" sensor in the dist due to heat soak and age, but no rough running.

Quote:

Quote:

Just wondering if it is the crank sensor, why the light didn't come on




I personally have never had a crank senser cause a rough idle issue.

Posted By: GO_Fish

Re: 2000 Dodge Ram 1500 running rough. . . .sometimes. - 09/23/10 04:19 PM

Quote:

Go Fish,
Did it run good for a long time and then start to miss and sputter and then clear back up for a long time before doing it again?



Yes, the problem was intermittant for many months. It would run normal with a full tank. If the gas went below 1/4 tank, it would start missing. Towards the very end it didn't matter if the tank was full or not, still would idle but bad missing under any load.
Posted By: Dustya440

Re: 2000 Dodge Ram 1500 running rough. . . .sometimes. - 09/23/10 04:24 PM

In responce to MoparsnMissiles:
Sounds just like what my truck does!
I just ordered the sensor.
Hopefully, this is the problem.
Posted By: MoparsnMissiles

Re: 2000 Dodge Ram 1500 running rough. . . .sometimes. - 09/23/10 04:35 PM

Quote:

Yup, generally when the crank sensor goes the motor just quits running.
Quote:



Yeah, my manual says that if the PCM does not see an output from the crank sensor within 3 seconds of starting the engine, it shuts the fuel system down. So this case would be a completely dead sensor.


Doesn't say anything about what happens with intermittent output or low output of the sensor.
Posted By: Cudajon

Re: 2000 Dodge Ram 1500 running rough. . . .sometimes. - 09/23/10 05:47 PM

Another thing to check is the beer barrel intake. Underneath they use a piece of sheetmetal to seal it off. They blow the gasket all the time. I replaced mine with a piece from Indy and cured a lot of those type of problems. A sure indication is that it will start burning a little oil.
Posted By: Dustya440

Re: 2000 Dodge Ram 1500 running rough. . . .sometimes. - 09/23/10 07:37 PM

Thanks!
I'll check that out also when I put the sensor on it.
Posted By: MoparsnMissiles

Re: 2000 Dodge Ram 1500 running rough. . . .sometimes. - 09/23/10 08:00 PM

Quote:

Thanks!
I'll check that out also when I put the sensor on it.



Lowest price on the sensor that I found is at O'Reilly's for $50. P/N is CSS813 for automatics, CSS812 for manuals (they cost more, $120).

Let me know if that solves the problem on your truck.
Posted By: 392charger

Re: 2000 Dodge Ram 1500 running rough. . . .sometimes. - 09/23/10 10:20 PM

I know it's a different year but my 2002 Ram 1500 with 360/Auto use to do the same thing. Would ramdomly start misfiring/popping thru the intake while driving. Almost like it was running on 6 or 7 cylinders. Then it would return to normal like nothing ever happened. The check engine light would come on but would be gone bu the time I got to the dealer. After several trips to the dealer they finally found the problem. It was a sensor located on the rear axle!? Go figure Been fine ever since though!
Posted By: Dustya440

Re: 2000 Dodge Ram 1500 running rough. . . .sometimes. - 09/23/10 11:26 PM

Wow, again this sounds just like my truck.
Anymore info on what kind of sensor it is?
Posted By: DartGTX

Re: 2000 Dodge Ram 1500 running rough. . . .sometimes. - 09/23/10 11:49 PM

ABS speed sensor reads the ring gear.
Posted By: MoparsnMissiles

Re: 2000 Dodge Ram 1500 running rough. . . .sometimes. - 09/23/10 11:52 PM

Quote:

I know it's a different year but my 2002 Ram 1500 with 360/Auto use to do the same thing. Would ramdomly start misfiring/popping thru the intake while driving. Almost like it was running on 6 or 7 cylinders. Then it would return to normal like nothing ever happened. The check engine light would come on but would be gone bu the time I got to the dealer. After several trips to the dealer they finally found the problem. It was a sensor located on the rear axle!? Go figure Been fine ever since though!



OK, this is getting too wierd. A week before this engine problem appeared, the ABS and BRAKE warning lights came on on my truck. They went back out later the same day and are NOT on now.

The only sensor on the rear axle that I know of is the ABS sensor on the differential.

HOW does an ABS fault cause the engine to run poorly, misfire, etc???? I thought they were totally different systems.
Posted By: DartGTX

Re: 2000 Dodge Ram 1500 running rough. . . .sometimes. - 09/24/10 12:03 AM

Rear wheel speed is read by ABS module...It passes the info. to the PCM and is used for vehicle speed and odometer. Fuel shut off occurs at 118 mph. If a erroneous reading is received by the PCM it WILL shut off injector pulse width.

Good luck
Posted By: 392charger

Re: 2000 Dodge Ram 1500 running rough. . . .sometimes. - 09/24/10 12:06 AM

I hear ya MoparsnMissiles. It was all too weird for me to figure out but the dealer eventually did. It was 4 years and 167,000 miles ago that this happened, but I'm almost positive it was the ABS you mentioned and it most definitely made it run like crap. Since the repair it has never done it again, and I have over 267,000 miles on it now. Untouched motor and trans. Best truck I have ever owned bar none!
Posted By: Dustya440

Re: 2000 Dodge Ram 1500 running rough. . . .sometimes. - 09/28/10 02:18 PM

Well, I replaced the crank sensor and so far so good.
But the problem was intermittent before so time will tell.
I am driving the truck more than usual to see if the old problem reoccurs.
I'll back in a few days.

Thanks everyone for the suggestions!!
Posted By: MoparsnMissiles

Re: 2000 Dodge Ram 1500 running rough. . . .sometimes. - 10/25/10 03:30 AM

Quote:

Well, I replaced the crank sensor and so far so good.
But the problem was intermittent before so time will tell.
I am driving the truck more than usual to see if the old problem reoccurs.
I'll back in a few days.

Thanks everyone for the suggestions!!




Any update yet on your truck?
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