caytlatic converter?s
Thread Starter
Newbie
Joined: Nov 2010
Posts: 10
Likes: 0
Model: Cherokee
caytlatic converter?s
I have a 01 grand cherokee limited and a month ago it started running rough,now even worse especially up and down hills. Im getting 60miles 2a half tank,ive replaced the map and o2 sensor,spark pluggs and air filter. The o2 sensor and spark pluggs on the drivers side was black but not the passenger. I looked n seen that it was black in color instead of rusty like the other2. ?? PLEASE HELP ME OUT
Last edited by okcjeeper; Nov 16, 2010 at 03:38 PM. Reason: You can't discuss cat removal.
CF Veteran
Joined: Mar 2009
Posts: 28,068
Likes: 6
From: Tenn. and Mich.
Year: 2004
Model: Grand Cherokee
Engine: 4.7L V8
You can't remove the cat. It's illegal and necessary for the proper operation of your Jeep. You need to fix the over-rich condition before it ruins the converter. And it's against the forum rules to discuss that here.
Welcome to CF.
Welcome to CF.
Thread Starter
Newbie
Joined: Nov 2010
Posts: 10
Likes: 0
Model: Cherokee
Thank you
How do i find out why its running so rich? That was 1 of the codes that i had when it was put on a diagnostic. Barometric pressure sensor was the other 1. What is that exactly and do ya know where its located? I couldnt find anything out about it in my haynes book.
CF Veteran
Joined: Mar 2009
Posts: 28,068
Likes: 6
From: Tenn. and Mich.
Year: 2004
Model: Grand Cherokee
Engine: 4.7L V8
That's the Map sensor. Which engine do you have?
I answered on your other thread. You need to keep things together instead of posting on two different threads asking the same issue.
I answered on your other thread. You need to keep things together instead of posting on two different threads asking the same issue.
Thread Starter
Newbie
Joined: Nov 2010
Posts: 10
Likes: 0
Model: Cherokee
4.7 Liter V8 I already replaced that,i had em clear it n then it was o2 bank1 sesor1.I replaced it and the other 1 on the passenger side b4the cat..... Yah i will keep it on this thread,i didnt know if there was different areas or not on here.
Thread Starter
Newbie
Joined: Nov 2010
Posts: 10
Likes: 0
Model: Cherokee
Yah i already replaced it but now the code is p0171 barometric pressure sensor. After i replaced the map,it ran good 4 a few mins then it started cutting in n out again. When i put it on the diagnostic it doesnt pop up the map code any more. I looked up online barometric 4 my jeep and the ony thing i got was the cat??? Im @ a huge loss if i dont get it fixed soon let alone the gas im dumping in throgh the tank in2the motor...
Trending Topics
CF Veteran
Joined: Mar 2009
Posts: 28,068
Likes: 6
From: Tenn. and Mich.
Year: 2004
Model: Grand Cherokee
Engine: 4.7L V8
This says it's lean, over-correcting with an over-rich condition. http://www.wjjeeps.com/faultcodes.htm#0100
Thread Starter
Newbie
Joined: Nov 2010
Posts: 10
Likes: 0
Model: Cherokee
Yah i already replaced it but now the code is p0171 barometric pressure sensor. After i replaced the map,it ran good 4 a few mins then it started cutting in n out again. When i put it on the diagnostic it doesnt pop up the map code any more. I looked up online barometric 4 my jeep and the ony thing i got was the cat??? Im @ a huge loss if i dont get it fixed soon let alone the gas im dumping in throgh the tank in2the motor...
CF Veteran
Joined: Apr 2009
Posts: 18,786
Likes: 14
From: CT.
Year: 88
Model: Comanche (MJ)
Engine: 4.0 HO
I copied this from a how to forum.
Inspect vacuum lines at MAP sensor and at Throttle Body. Repair as needed.
WHEN TESTING THE MAP SENSOR, ENSURE THAT THE HARNESS WIRES ARE NOT DAMAGED BY THE TEST METER PROBES.
Inspect vacuum lines at MAP sensor and at Throttle Body. Repair as needed.
WHEN TESTING THE MAP SENSOR, ENSURE THAT THE HARNESS WIRES ARE NOT DAMAGED BY THE TEST METER PROBES.
Test the MAP Sensor output voltage at the MAP Sensor connector terminal B (as marked on the sensor body). This is done with the ignition switch ON and the engine OFF. Output voltage should be 4-5 volts.
The voltage should drop to 1.5-2.1 volts with a hot, neutral idle speed condition.
Test engine controller (terminal 5) for the same voltage as described above to verify the wire harness condition. Repair as necessary.
Test MAP Sensor supply voltage at sensor connector (terminal C) with the ignition ON. The voltage should be approximately 5V (+/- 0.5V). 5V (+/- 0.5V) should also be at terminal 6 of the engine controller wire harness connector.
Test the MAP Sensor ground circuit at the sensor connector (terminal A) and the engine controller connector (terminal 4).
Test the MAP Sensor ground circuit at the engine controller connector between terminal 4 and terminal 11 with an ohmmeter. If the ohmmeter indicates an open circuit, inspect for a defective sensor ground connection. This connection is located on the right side of the cylinder block, at the oil dipstick tube mounting stud. If the ground connection is good, replace the engine controller. If terminal 4 has a short circuit to 12V, correct this condition before replacing the engine controller.
CF Veteran
Joined: Mar 2009
Posts: 28,068
Likes: 6
From: Tenn. and Mich.
Year: 2004
Model: Grand Cherokee
Engine: 4.7L V8
Looking up those codes on the above list, it seems to me the first one is the map sensor which could be causing the issues with the other.
Thread
Thread Starter
Forum
Replies
Last Post
Raney120
Stock XJ Cherokee Tech. All XJ Non-modified/stock questions go here
22
Oct 16, 2015 11:27 AM
TNXJsleeper
Stock XJ Cherokee Tech. All XJ Non-modified/stock questions go here
1
Oct 2, 2015 08:04 PM
Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)