What was the problem with the 2002 Jeep Wrangler misfire?
Ran rougher than before and got a new code P0135 02 Sensor error, P0300, P0304, P0303, P0305, P0306 also noted at idle exaust seems to have a strong puff and chugging noise. Computer Flow Chart/Repair – Cylinders look fine, O2 Sensor heater circuit is no good. some sort of carbon test was done with #3 fuel injector disconnected.
What does rough idle mean on a jeep?
While the Jeep was stopped and idling, for example at the stoplight, we both noticed the engine idling rough, like it wanted to stall out, with the RPM fluctuating between 400-500 RPM (it did dip to as low as 350 on a couple of occassions). No trouble codes were displayed, however.
What causes a rough idle on a 4.7 Ho?
He also mentioned that bad O2 sensors can cause a rough idle, but he said bad O2 sensors would not cause the engine to idle as roughly as it did. He also noted that he had to clean the injectors while the top end was apart since there were gummy deposits on them. FYI, all the injectors and both fuels rails were replaced last December.
Where is the idle air passage on a jeep?
Hi Nuttyjeep, when you remove the resonator box from the throttle body, you can see the idle air passage on the lower side of the throttle body just below the throttle blade. When you remove the IAC motor (again), you can clean the air passage on both sides from the control opening.
Ran rougher than before and got a new code P0135 02 Sensor error, P0300, P0304, P0303, P0305, P0306 also noted at idle exaust seems to have a strong puff and chugging noise. Computer Flow Chart/Repair – Cylinders look fine, O2 Sensor heater circuit is no good. some sort of carbon test was done with #3 fuel injector disconnected.
What kind of engine does a 2002 Wrangler sport have?
I have 2002 Wrangler Sport 4.0 stock engine with 141,000 miles. Here Is what I gave my mechanic when I gave up throwing random parts at the problem. Oil Guage has been reading high pressure – I felt Sending unit bad – It has been that way for 90 days or so. Problem is intermittent
What happens if you have a jeep p0302 misfire?
The P0302 trouble code will trigger the Wrangler’s service engine soon light. The vehicle itself may begin to run rough. It depends on how serious the misfire is. The vehicle may produce excess vibration, especially at lower RPM. Fuel mileage may suffer. You may smell raw gas coming from the tail pipe. The vehicle may backfire.
Are there any problems with my Jeep Wrangler?
Drove Jeep for 10 miles and had ALL monitors (except Evap) go ready. Immediately went to the smog shop where it passed with flying colors. Yeah!!! Since the successful smog test I have driven about 400 miles with ZERO problems. In fact the engine runs much smoother now.
Is there a 2.5 engine in a Jeep Wrangler?
They are severely underpowered for the weight of the jeep. The 4.0 gets almost as good of milage and has the power to actually pass someone if need be. Also a 2.5 engine is hard to find and expensive….4.0’s are plentiful and half the price. I just bought a 4.0 TJ just to get away from the 2.5 nightmare. Mine has 143K and I hate it.
What does cylinder 3 on a Jeep Wrangler mean?
Driving with a misfire can damage the vehicles catalytic converter. The engine is also not firing all of the fuel, so raw fuel is also passing through cylinder 3 into the exhaust. Mileage may suffer as well when your Wrangler has P0303. P0303 is a cylinder specific misfire code, which means that Cylinder 3 is misfiring and causing the code.
I have 2002 Wrangler Sport 4.0 stock engine with 141,000 miles. Here Is what I gave my mechanic when I gave up throwing random parts at the problem. Oil Guage has been reading high pressure – I felt Sending unit bad – It has been that way for 90 days or so. Problem is intermittent
What causes the p0303 to misfire in a Jeep Wrangler?
Vacuum leak – If your Wrangler has a vacuum leak, it can be very difficult for it to get the right air/fuel mixture. This will cause the cylinders to misfire and it’ll throw the P0303 if the leak is around that specific cylinder on the intake manifold.
Driving with a misfire can damage the vehicles catalytic converter. The engine is also not firing all of the fuel, so raw fuel is also passing through cylinder 3 into the exhaust. Mileage may suffer as well when your Wrangler has P0303. P0303 is a cylinder specific misfire code, which means that Cylinder 3 is misfiring and causing the code.
How long does a TJ 4.0 mystery misfire last?
I have a 05 TJ 4.0 and i have been chasing a random misfire on cyl 1 for almost 4 months. It will drop the cyl or miss on and off for 2-3 days (day driver 76miles a day) and then just “fixes” its self for as little as a week or as long as almost 2 months.
What happens if you misfire the cylinder 3 on a wrangler?
Driving with a misfire can damage the vehicles catalytic converter. The engine is also not firing all of the fuel, so raw fuel is also passing through cylinder 3 into the exhaust. Mileage may suffer as well when your Wrangler has P0303. Jeep Wrangler P0303 Definition
What was the code for the 2002 Jeep Wrangler misfire?
Cleared codes by pulling battery cable Start run, a little rough, but accelerating fine. After 10 of driving 2800 rpm problem returns. Code P0303 back. Drove the Jeep to the store in very cold temps. Ran rougher than before and got a new code P0135 02 Sensor error, P0300, P0304, P0303, P0305, P0306
The P0302 trouble code will trigger the Wrangler’s service engine soon light. The vehicle itself may begin to run rough. It depends on how serious the misfire is. The vehicle may produce excess vibration, especially at lower RPM. Fuel mileage may suffer. You may smell raw gas coming from the tail pipe. The vehicle may backfire.