Question about 2000 Jeep Wrangler
Engine misfired while trying to start,then it started making a loud sucking noise like a vacuum leak then the check engine light came on and it started missing. checked the codes with my obd reader and it gave a misfire code and a cam sensor code cant remember the numbers
I would reset the codes and make sure there are no vacuum leaks and check that the throtle tube is on and tight, this is the tube from air filter box to throtlebody. if the codes return then i would start with plugs and check the coil boots first, again thats if there are no vac leaks, it almost sounds like the idle air valve got stuck for a sec. and last make sure the throtle plate is clean and throtlebody. good day.
Posted on Feb 20, 2012
Testimonial: "the misfire blew off a vacuum line and caused the cam sensor fault. reconnected vacuum line and reset fault. Problem solved thanks"
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Posted on Jan 02, 2017
Code 1682 indicates low battery voltage. This could be a problematic alternator, which would likely cause misfiring. Autozone should be able to check this for you for free.
Code 1391 indicates the computer can not see the crank or cam sensor signal. This would likely be a result of the misfires.
Code 0320 indicates the crankshaft position sensor reference signal could not be found while the engine is cranking.
All of these issues point to either a cam/crank sensor malfunction or a charging system problem, either or both of which could cause the misfiring.
Posted on Sep 06, 2009
replace wires and plugs if haven't been changed in the last 60k,check coil pacs but doubt 2 of them are out the same time.
Posted on Oct 26, 2010
SOURCE: HAVE A 2001 JEEP GC
Most likely, the P0442 and P0455 are not the causes for your engine problem, they are related to the fuel supply system (check http://www.obd-codes.com/p0442 ).
P0303 is the problem.
First, I'd try to change the spark plugs. If still not OK, I'd try to use an "Fuel system cleaner" or "Injector cleaner". These are some small plastic bottles you can buy at car-parts shops. You need to buy the version according to your engine type (gas or diesel) then use it as stated on the instructions printed on the bottle.
Of course, the problem could be worst, but 90% of the problems are caused by small causes.
Posted on Mar 08, 2011
SOURCE: cylinder number 5 misfire, what
I'm assuming the code that was pulled is P0305. Best case would be a bad spark plug on the number 5 cylinder. Keep in mind, the spark plugs are torque sensitive when installing. These are the possible causes that are stated in a Jeep service manual for your vehicle. Check the basics first......Camshaft,crankshaft,valve timing or vacuum problem,ignition coil output is low,engine internal mechanical problem,secondary ignition pattern is irregular, fuel contamination, Fuel pressure leak down is out of spec, fuel pump ampere out of spec, fuel pump capacity out of spec, fuel pressure is out of spec., engine compression, PVC system restriction, Fuel injector #5 is defective or the connection on the injector itself is loose or corroded, Intake gasket defective. It could also be freeze frame data in the PCM, but this is a very very rare cause.
Posted on Mar 15, 2011
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