Lexus GX 2004-09 :: 2005 Engine Running Rough / Exhaust Leak At The Head
Apr 5, 2015
My GX had developed yet another issue. To start off my car has an exhaust leak presumably at the head. Thats what i been told. This condition would throw a P0430 code ( catalyst system efficiency below ) once or twice a week, which id just erase with my plug in tool. Im not sure if the new developed issue is related to it, but now the engine is running rough especially noticeable between 1000-2300 rpm. Feels like misfire. When driving i can feel a drone or a frequent shake if rpms are in that range or when unloading the motor and rpms are dropping. No codes! Timing belt was changed at 90k miles car has 150k now. Not sure if its due for another one now and this can be the cause.
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I just purchased a 2003 V10 with 270 000kms. The truck had had regular maintenance. It has an exhaust leak and runs a little bit rough. Could the exhaust leak cause the truck to run a little rough or am I dealing with another issue?
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We have a 2005 Prius with 77,400 miles on it. My wife came home from a short trip yesterday saying the engine was shaking the car and the CEL was flashing. About 4 months ago we also had the CEL come on but not flash and it ran a bit rough but not as bad as it is now. I was told by our local dealer that a flashing light is worse than if the light comes on and stays on. When this happened 4 months ago at 74,000 miles the dealer said they downloaded codes P300, 303, and 304 and that I needed to replace all 4 fuel injectors.
I realize that 300 is a general misfire code and 303 is a misfire code for cylinder 3 and 304 is for cylinder 4. After reading some advice on here 4 months ago, I cleaned my MAF sensor, ran some fuel injector cleaner through a tank of fuel, replaced all 4 spark plugs, and started buying Chevron gas. The CEL stayed off and our mileage went back to normal. I thought I had solved the problem but now this after 3000+ miles. I checked all the ingitors, connections, spark plugs, and wires yesterday and all seem to be in good condition. Maybe they were right and the fuel injectors are going bad. I am at a loss as what else to do other than take it back to the dealer now and plan do that this afternoon.
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So I've been sick for the past few days and my GX has been sitting in the driveway. I finally started it up on Sunday to run some errands and the CEL came on and the engine was running really rough. So I took it up to the dealership and had them pull the codes. It was showing a problem with the knock sensor.
I had to leave it until today so they could diag it further and see what the real problem was. Turns out I have a freaking rat in my engine and it ate my wiring harness. The service tech told me he jumped back when he took off the engine cover and saw an 8 inch rat scurry away. It is now sitting out in the lot until they get the rat out because they don't want it loose in the garage.
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I have the 2.4l engine and the car has 177K on it. Bought it from a friend at 60K and never had a problem with it. I started getting the coolant puddle from the rear of the engine. We took the intake manifold off and saw that the head was leaking in the rear. Real small drop forming and then falling. No codes at the time either. Seems this car has problems with the Engine bolts and was wondering how many people out there had a blown head gasket and there was no bolt issue?
Also I know this is not the right thing to do but use Engine Block Sealant? This is the kind that you drain your antifreeze,flush twice and then run this stuff in it for little while and then replace with antifreeze.
I am upside down on the car because I put 50K a year on so don't think I will get anything for trade. I am hoping my brother in law and I can fix it but am wondering what the odds are there is a problem with the bolts.
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The problem only occurs on a cold start. I put the key in and start the motor. It starts fine. It runs fine for about three(3) seconds and then the RPM's start to dive (I have to give it gas to keep it from dying). The exhaust begins to put out quite a bit of smoke and the engine runs really really really rough,... kinda like it has a heavy cam in it.
After a few minutes of this exhaust smoke and rough running, the engine of course is warming up. The RPM's start to come up on its own, the exhaust smoke disappears and the really really really rough idle (not really an idle because I have to give it gas to prevent the motor from dying) disappears and the car idles perfectly.This cold start problem also uses up a noticeable amount of gasoline.
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How many O2 sensors does a 2.3 fi 4 cyl. have. I think just one on the manifold, but I'm not completely sure. Engine is running very rough and seems to miss at low RPMs, has no power and drinks gas like crazy!!! Emissions light is on on the dash. I'm thinking O2 sensor......tried replacing, but couldn't get enough torque on the sensor socket wrench to loosen, may be rusted.
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The passenger side HID bulb of my 2005 RX330 need to be replaced, how to? Also there is condensed water in the assembly. I am going to replace it later. Where are other screws beside two on the top?
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My check engine light came on in my 06 toyota avalon. i had the code read at pepboys and they said it was something like 0300 misfire. i took it a few days later to my personal mechanic and he said nothing popped up when he tested the code. i notice the car (engine) is running a little rough though. What is the firing pattern as i want to try and fix by putting new plugs and coils.
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My 05 Gx has the infamous manifold exhaust leak on the driver side. I'm planing to change it myself I don't think it should be that tough.
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My 05 was running rough and misfiring quite frequently. After much deliberation, I took it in for a diagnostic hookup. The dealer said my driver side cat was clogged. Lucky for me, I was just under the warranty period(79673 miles). I have had it replaced and I can feel a noticeable difference in the way it runs. Could a clogged cat have made it run that poorly or am is it just in my head that it is running alot better?
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I changed the timing chain, phasers, tensioners, guides, and cam sensors and solenoids about 30k miles ago. Truck now has 170k miles. This past weekend engine started running so rough, it had the whole front end shaking. Threw 8 codes..1 bank..lean, bank 2 rich, timing retarded, cylinder G and F misfire, and more codes. It seems to have jumped timing pretty bad.
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Strange ticking noise that you can hear in the cabin sounds almost like a exhaust leak or a fan blade ticking something under the hood.. I have had the dealer check it they say nothing is wrong i just can't believe a 75k car can have this noise...
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Code says P1121 Accelerator Pedal Position Sensor Range/Performance Problem. I heard that was wrong and its really coolant control valve? The battery drains fast and the can runs like crap. Would this code be doing that to the car?
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To make a long story short, after replacing the timing chains, guides, and tensioners, the right side cylinder head began running very loud. Think of the usual chatter associated with these engines and multiply it. It was constant, from start up to shut down, and it increased with rpm. Thought at first it may be caused by debris in the oil clogging the lifter(s). After changing the oil multiple times along with different additives and driving roughly 600 miles, the noise persisted. Taking a look down the oil filler tube with a flashlight and with the engine running, the head looked dry. Safe to say at this point I was starving the head of oil.
Removed the valve cover. Removed the rearmost camshaft cap. Sure enough, the oil passage was completely blocked. Inspected everything and there was signs of running dry (minor discoloration, dried oil spots... but no real damage and no play anywhere. Put it all back together and the truck runs quieter than the day a bought it.
Here's the camshaft cap:
This is exactly what it looked like after removal. The material blocking the passage is hard and bridle like plastic.
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Installed a remote start system. After a given time ,the car engine shuts off but the lights don't, The light will only go off when the door is opened then closed. This has cause by battery to drain. Is there anyway to configure the lights to shut off when the engine shuts off? I have a 2005 GX470.
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So today my CEL came on. I immediately looked at my mileage and I was EXACTLY at 500m past my oil change the other day. I checked the dip stick and lo and behold, it was about 3/4" past the full marker. I took it back to the oil change place and had them drain it down to a good level.
I had driven from NH to NY this week. I filled up my gas tank on my way home from NY. Gas cap was on nice and tight for sure.
The code is still on (not sure how many miles or drive cycles is required) for something to clear. I figured it was perhaps due to too much oil added. I decided a few hours later to take it to AutoZone and grab the diagnostic code. It's a P0420 code (Cat System efficiency below threshold: Air leak in exhaust before rear HO2S, AF Sensor Error, Fuel System Fault, Faulty Catalytic Converter).
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2005 F250 6.0L ... My truck is running really rough when the engine isn't all the way quite warmed up. once the truck is fully warmed up to normal running temp it runs good. I am getting four engine codes. P0672, P0673, P0674, P0676 These codes say 2,3,4, and 6 glow plugs have a open circuit. Can this be the cause of my problem?
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i have a chevy venture and it was running just fine untill this morning it started to have a good amount of smoke coming from the exhaust and is running rough i took it to the autozone and had the codes checked since i let someone borrow my code reader but when i went there and had it done i got 5 codes out of it and they are....
p0300
p0301
p0463
p1106
p1189
What happened to it since it was running just fine all yesterday and before...
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I have an 04 Excursion with a 6.0PSD. I am currently experiencing a coolant leak, not very bad at the moment but I would like to fix it. The coolant is running down the back right side of the engine and I can see coolant pooling on the pan on top of the motor, specifically the right side. I can see some moisture on the front of the engine but it is below the top of the engine and I do not think this would be the cause since coolant won't flow up hill. I can't see or smell any coolant flowing when the engine is running but see it at idle and when parked.
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I have a 2004 VW Touareg with 116K miles. Yesterday the check engine light came on and she is running very rough at low RPMs. The manual tells me that there is either a problem with the exahust manifold or an O2 sensor is bad. It feels as if she is struggling for air. When you start the vehicle the check engine light flashes then stays on in the cluster. What can I expect when I take it in to the dealership? Is there anything I can check before I take it in?
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