I have a 2000 jeep grand cherokee that started running rough block isn't cracked and all the gaskets are good . this all started after an overheat as soon as it started to overheat though i turned it off so it wasnt running more than a minute the idle is kinda rough but when i put it in gear it gets real rough any ideas what might cause this.
Putting it in the shop is not an option i live about an hour from a shop
2006-08-27 15:47:10 · 7 answers · asked by wardancer 3 in Cars & Transportation ➔ Maintenance & Repairs
Is the "Check Engine" light on? if so, you need to gather the codes that are stored in the computer.
If you get a code similar to P0351, P0352, P0353, or something like it (P03XX) there is a failure with the ignition coil assembly (it has a bar with three coils inside mounted on top of the spark plugs.
This is a common failure for the 4.0 Jeep.
If it is a 5.2 or a 5.9 It is still down to gathering the codes and proceeding with the diagnostic trouble tree for repairs.
If you are going to do the repairs yourself, remember, the code identified the circuit of the system affected, NOT necessarily the component.
You can get the information from a repair manual (< $20.00) or at the library in the reference section, or you can subscribe to the resources at this site.
http://www.autorepairmanuals.biz/site/573683/page/588618
Good Luck
2006-08-27 17:41:54 · answer #1 · answered by Ironhand 6 · 1⤊ 0⤋
How do you know the block isn't cracked and the gaskets are good? There are tests for this have you done them?
Worst case:
When it got hot did you put water in it? You should have let it cool down and THEN put water (or coolant) in it. If you put cold water in the radiator and then started the engine you probably cracked your block or heads. If you have to add water to a hot car always add it SLOWLY with the engine running.
Medium case: The heat may have caused your head gasket to fail. Is there water in your oil or coming out your tail pipe (both could also be related to worst case).
Best case (but not likely); Your plugs or plug wires or distributer cap could have failed from the heat. You could have also fried your O2 sensor. You can also disconnect the battery for a few minutes and this will reset your ECM. Sometimes this helps, but if it is the ECM it is usually bad from the start to finish. You may also have some gum in some of the injectors. Try running some Chemtool through it at a richer rate than the lable calls for.
I don't know what what engine you have or how many miles are on it so it is hard to give more advise on the web for this.
2006-08-27 23:25:42 · answer #2 · answered by bill k 3 · 0⤊ 0⤋
Possibly a sensor was 'cooked' when engine got to hot and has tripped the ECM into limp mode. Don't count out a burned piston or valve, though. Try disconnecting the battery for about fifteen min then reconnecting and start up. (hey, it's worth a shot).
2006-08-27 22:55:57 · answer #3 · answered by Anonymous · 1⤊ 1⤋
Check to see if you have any oil in your anti-freeze. And check your oil to see if there is any anti-freeze in it. If the answer is no to both. You probably have a burnt valve. Also check spark plugs/ wires.
2006-08-27 22:55:20 · answer #4 · answered by metalize06 2 · 0⤊ 0⤋
if it is missing under load it is usually a bad spark plug.
2006-08-27 22:53:45 · answer #5 · answered by Mr. Superman 3 · 0⤊ 0⤋
check the coolant level. If that is ok, you may have cooked your engine.
2006-08-28 09:55:10 · answer #6 · answered by deadcars42 3 · 0⤊ 0⤋
Its the gasoline you put in
2006-08-27 22:52:46 · answer #7 · answered by J&B 3 · 0⤊ 1⤋