Re: 2006 jeep wrangler after starting making a high...
CCK THE OIL 1ST ALWAYS. DO YOU HAVE A 2 FT HOSE .PUT 1 END TO YOUR EAR & PUT HOSE AROUND NIOSE AREA. MAY_- NOT BE WERE YOU THINK . ALWAYS PUT ON CASE OF ALTERNATOR, WATER PUMP, DISTRIBUTOR . NEVER ON MOVEING PART. STETHOSCPE BEST , CAN USE DOWEL CAREFULLY.
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Not much you can do with that unless you remove it. Most I've seen that were jammed had a coin or small toy stuck inside. If you can't shake it loose, you are half way there to replacing it. Generally they are easy to find in local scrapyards at a reasonable price.
The p0304 code is a misfire on cylinder 4 (the last number indicates the cylinder). Check the plug and compare to the others. The plug should be a grey peach colour. Now check the plug lead end socket. There should be no signs of tracking through the insulation to the cylinder head. Check the high tension lead resistances. If lead 4 is much higher resistance than the rest, replace it. Now take a look at the distributor cap, make sure that there are no signs of tracking on the interior or the cap is cracked. Ensure that the contacts and distributor arm are clean and free of build-up. Since the error is specific to one cylinder it is likely that the coil is OK.
No pump should be noisy, though if only noisy when wheels are turned all the way to either side, that is normal. Once turned to the point where the pump first begins to make noise you really don't have any more wheel movement and turning the steering wheel further does very little except cause the noise. I've found that on many Jeeps the steering stop bolts on the lower control arms are set too far in and can be turned back a bit. That may help somewhat.