Calgary Jeep Association
4x4 Related Groups => Tech Talk => Topic started by: Evil-Jeep on August 14, 2013, 09:36:55 PM
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2003 TJ, 4.0L
So water pump went last week, no problem I replaced the pump last Monday(1week 2days ago)
all seemed fined, thought maybe the engine was a bit warmer than usual, but thermostat sat were it should, so I figured I was just being overly paranoid.
2 days ago started to get a loud whistle, didn't have time to look at but figured it was probably just a vacuum line or that the throttle body needed cleaning.
...... Today..... Can hardly get the jeep to go 100Km/hr in 4th gear, burned 1/2 tank of gas to work and back (80kms round trip highway) and she is screaming like a teapot, and everything is hot.
I figure I must be burning exceptionally lean, and this is likely causing it to run hot, new pump and fan are still keeping thermo stat readings in check.
So, did I possibly miss something during the new water pump instal, is this just a new problem. I am leaning towards a vacuum leak as I can not detect any exhaust leak, and can not hear any ticks while listening under the hood near the exhaust manifold.
I have sprayed carb cleaner along the base of the throttle body, vacuum lines, injector seals and ran throttle body cleaner down each vacuum line.
The whistle is not present at start up, but occurs when idling down or letting off the gas, the slightest pressure on the gas peddle removes the whistle.
both sensors on the throttle body have been replaced belt has been replaced. and I cant hear exactly wear it is coming from as it is too loud to pin point.
Thoughts, or suggestions to trouble shoot?
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The whistles go wooop wooooop!
did you install the thermostat the correct way? They will fit in upside down as well.. Not sure if this would cause a whistle but could definately cause you to overheat..
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Get a funnel and a length of hose. Attach hose to funnel, hold funnel to ear and move hose around engine bay till you pinpoint the whistle. Works like a charm.
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Hoping I may have air or steam in the system, it would make sense other than the whistling dropping off when I am on the throttle, but who knows. Has any one delt with steam issues due to air or improperly mixed coolant.
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I would worry more about the running lean. Have you checked your plugs?? If you are lean, your plugs would be white. BUT if you are going through that much fuel my guess is rich, black and maybe wet. Could be a plugged cat too. A whistle that goes away with throttle could be your throttle body loose intake manifold leaking... Or major exhaust leak letting fresh air into the manifold messing with your o2.
Sent from my iProne
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Sorry, I meant running rich not lean.
Checked Codes Last night...... nothing there.
Checked throttle body bolts.... 1/8 - 1/4 inch turn on each, no difference.
I think I may pull the water pump back off and redo that instal as well as try another new thermostat, and flush the system, as this all started shortly after putting in a new water pump.
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Not fluid level in the rad,
I also discovered that driving 50km/hr down hill for about 2km, will temporarily solve the whistle sound.
??????
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if your rad cap is not the highest point in the system then it would still look full even though there may still be air in a hose somewhere.. Driving downhill would put the high point further back causing the air bubble to move as well. Still not sure why its whistling... ;)
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Well long story short...... take everything apart and put it all back together and the whistle is gone... for now.
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squeal fixed.....
Now I am so bogged down I cant get it to do 60 or 3000rpm out of gear
Error Code p0174 - Fuel System 2/1 Lean
At least I have something to work with now
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That whistle sounds like a vacuum leak. Vaccum hose cracked somewhere? Leak on intake manifold gasket? Throttle body leak ? All would cause it to run lean and overheat and computer would try to make it run rich.
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From what I have been able to make sense of is that Code p0171 is the front most bank and p0174 is the rearmost, I only have the one code - p0174.
This should rule out a leak at the throttle body, or any of the hoses..... it could be the gasket on the intake at the rear bank
I actually got rid of the whistle, but I am have also opened up the leak enough to prevent it from sounding.....
Guess now is as good as time as any to replace the intake gasket.
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Have you tried checking the torque on the bolts? I have had a few jeeps cured by tightening intake bolts,.. If you think the gasket is leaking use a unlit propane torch and run it across the manifold to head gasket. If the rpm increases you have a intake or vacume leak
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Longer sigh.....
Pulled the spark plugs out, front bank looked good. rear bank heavily carbon fouled. Cleaned and put back in.
Good suggestion on the torch...... ran on top and under no change. Reset computer and revved up, all seemed better.
And then I backed out of the driveway....
within 10 feet she bogged down, RPM won't even go up to 2000rpm. Clutch in no RPM's over 2000 rpm.
I would almost say bad fuel or clogged filter if I had both codes or any evidence in both banks.
Guess I will start replacing sensors, any other suggestions?
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I did re-tighted the bolts to the intake manifold, about 1/8 - 1/4 turn each
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Pull the exhaust before the cat to make sure
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i would almost say the cat is plugged but don't think it'd bring that code up and would smell like rotten eggs and at night would glow red, and little exhaust would come out
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I actually thought that it was a plugged exhaust at first by the way it bogged down.
It starts great though, and runs good, until it warms up a bit. Apparently the o2 sensors don't "come online" when starting, this fits the problem.
Still could be a leak, that requires the block or intake to heat up to allow for a vacuum leak to occur, but I feel this has been tested so many times now with nothing found.
Sensor will be in this afternoon and hopefully get it installed tonight.
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Well dealership sold me the wrong part.... new one isn't in until Friday.
What a PITA getting the old one out, I finally gave in to the try PB to un-stick bolts, figuring it would be like all the other "best penetrant to use" cans...... Wow, I am a believer!
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Well rule out the o2 sensor :'(
idle is good
showing lean condition, but burning rich
a little bit of a popping when over 35oo rpm(have a bit of range again)
seems to get more sluggish the longer I drive.
it is now more of a hesitation and no power issue. it just seems weird that only the rear bank shows any signs of an issue.
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rule out, tps and oxygen temp aswell.
Frack it, its going to the shop in the am.
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Dealership was closed.... but at least I had time to find the issue.
Good Call Jenssen, the Cat was completely done.
Any body have any success with any online shops that have carry catalytic converters , the only place up here that has a replacement wants $2000 for theirs.
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WHAT THE F. What the hell is it made of?... Friken gold? A universal cat from magnaflow with a spot for an o2 is like 85$ from crappy tire. I'm sorry to hear you're getting raped up wherever you are.
Sent from my iProne
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1498 for the part (its the two cats coming from the header) $798 for labor, and some misc parts.
Good news is I found a flowmaster replacement for $498 on line and the dealership matched the price, I will do the install.
New question though do I really need the third cat located right before the muffler.
I am replacing the parts, from the manifold down to that cat, I can see why the first two off the headers are essential for proper operation of the o2 sensors, but am thinking of just running from the down pipe directly to the muffler and out.
Can I do this without issue, or is that other cat essential?
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Short answer is yes if it doesn't have an o2 after than nothing will change.
Sent from my iProne
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thats what I though thanks.
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Carline on 58th ave SE have "high flow" cats they can install for cash and no reciept...
The 2 upstream are needed yes... They still might be able to give you a good deal tho. I have always dealt with Al and never had a bad experience there.
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Well $800 later and everything is now replaced... headers, cats down pipe, cut out the third cat and replaced the muffler. all 2.5 inch.
Still need to put on proper muffler, as I had an old cherry bomb tube sitting on the shelf from back in my teen days. Good news is I have grown up a bit as I now recognize that the extra loudness is annoying to most people, still brings a smile to my face though out on the back roads.