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Old 05-06-2014, 03:26 PM
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Exclamation Help! P0352

OK so here's some info
2000 grand Cherokee Laredo
137K
4.0 I6

The car originally had a slight miss no codes but it was felt we changed plugs(autolite platinum), the old ones were worn down alot. then I finally got the code for cylinder #3 after holding a high idle (2500k), a week after code came up I replaced the coil rail the code went away but it still has the same mystery miss

Now that the history is known this brings me to a few days ago when the jeep was idling after a warm up we were turning the wheel listening to a noise then the engine stated shaking and there were 3 codes P0300,P0302,P0305. We pulled the plugs and they looked good so we let it sit and it started the same so we did a cold compression test and we got 150-160 all 6 so then we read online about the cam sensor so we replaced that

We then took it to the shop after finding a exhaust leak while in there my brother said they had the car idling and the rpm went up then bogged down and then returned to normal they turned off the car and found the first coil was cracked and smoking so we gave them the original coil (not OEM there are no Chrysler logos) they replaced it but it now has P0352 but no misfire codes

we read that it might be the cam synchro that we have to turn so we did but we turned the drive gear and the oil pump and the car didn't start so then we got it to tdc and aligned it according to the factory service manual with the toothpick and it started up but code was still there we tried turning it again this the time the correct way that the FSM says and nothing so now we have no idea what it can be someone told us it can be PCM but I don't know

Any help is appreciated
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  #2  
Old 05-06-2014, 09:44 PM
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Re: Help! P0352

Welcome to the garage.
Was the P0352 code reset after the coil rail was changed? The idle miss could come from a bad crank sensor. (if you would decide to change the crank sensor, then is here a good how to: How To: Replace Crankshaft Position Sensor)
Also it seems that jeep engines like more the standard copper core plugs then special plugs.
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  #3  
Old 05-06-2014, 10:12 PM
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Re: Help! P0352

I did and it came back on once started again also tommorow I will change plugs to copper and put back original cam sensor
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Old 05-06-2014, 11:09 PM
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Re: Help! P0352

But did you try a new crank sensor already?
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Old 05-07-2014, 09:41 AM
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Re: Help! P0352

No but I did buy the copper plugs and install them and no difference also I put original cam sensor on and turned it while engine was running and it hits a spot where the idle raises but goes back down and acts the same

Also now I got codes
P0351
P0352
P0353
And P1391 which is wheel speed sensor 1 circuit performance which is new and only came up this morning
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File Type: jpg Screenshot_2014-05-07-09-57-29.jpg (129.0 KB, 5 views)
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Old 05-07-2014, 05:13 PM
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Re: Help! P0352

I think that your scanner is making a mistake for the code P1391. According to my jeep DTC list means P1391 " intermittent loss of CMP (cam position) or CKP (crank position)".
I would check the wiring to CMP and CKP and if all ok change the crank sensor.
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Old 05-07-2014, 05:27 PM
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Re: Help! P0352

I made a video for anyone else to see and hopefully it will help them on adjusting the sensor but in the video you can hear how the engine sounds and how it acts to a adjustment

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Old 05-07-2014, 09:56 PM
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Re: Help! P0352

Quote:
Originally Posted by Frango100 View Post
I think that your scanner is making a mistake for the code P1391. According to my jeep DTC list means P1391 " intermittent loss of CMP (cam position) or CKP (crank position)".
I would check the wiring to CMP and CKP and if all ok change the crank sensor.
I changed the cam sensor back to newer one and it did not want to start so I went back to original and all codes went away after another adjustment except for original Code P0352 so now I'm back to the same thing

One more thing is that when I raise the Rev it clears up and doesn't bog down but it doesn't run perfect it will make a video
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Old 05-07-2014, 10:08 PM
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Re: Help! P0352

Did you already remove the PCM connectors and check for moisture/corrosion on the pins? Coil driver circuit #2 uses connector C2 pin 9
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Old 05-08-2014, 07:22 AM
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Re: Help! P0352

Quote:
Originally Posted by Frango100 View Post
Did you already remove the PCM connectors and check for moisture/corrosion on the pins? Coil driver circuit #2 uses connector C2 pin 9
I tried to take the PCM connector off but it won't release i pressed top and bottom clips and nothing I don't understand how it comes off since it also has locking tabs but since it doesn't move those don't come off either also PCM has a red "paste" on it

The video shows the harness and the paste so does the picture
Paste stuff on PCM connector - YouTube
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Old 05-08-2014, 11:17 AM
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Re: Help! P0352

I would first remove the overflow reservoir to get better access to the PCM connectors. Also remove the battery negative terminal to avoid any sparks. Not sure what the red stuff is, it almost looks like some plastic which is stuck in between the PCM and connector.
Looking better at the picture it almost looks as RTV on the connector. Something strange was done there.
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Old 05-08-2014, 12:01 PM
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Re: Help! P0352

I have removed the overflow tank before but Even with the extra space it won't budge. It feels like something silicone so it might just be rtv also have you removed the PCM before do I only have to press the two clips to remove?
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