Question about 2004 Chevrolet TrailBlazer

3 Answers

Just two quick questions.

Hi Em, just two quick questions.

Can a defective exhaust system cause the temperature gauge indicatorgoing suddenly up when you press the accelerator pedal, and then godown? and How?

Can a faulty auto trans shift to a lower gear at an excessive speed, causing the engine to **** and raising temperature up ?

That is not very important, just wanted to confirm some ideas of mine.

Posted by on

  • Ginko
    Ginko Nov 02, 2008

    Thanks.

×

3 Answers

  • Level 2:

    An expert who has achieved level 2 by getting 100 points

    Governor:

    An expert whose answer got voted for 20 times.

    Corporal:

    An expert that has over 10 points.

    Mayor:

    An expert whose answer got voted for 2 times.

  • Expert
  • 21 Answers

Yes a clogged exhaust will cause many problems, one of them being overheating. however if you are having these problems, most likely it is your fan clutch, on the trail blazers, envoys, colorado, etc... they have an electric fan clutch, not as in it is an electric fan, but if you look through the fan shroud you will see wire going to the center of the can clutch, i have seen many of these act up, causing high temps at highway speeds, and sudden overheating. often when they go out you will hear a whirling noise along with it that will come and go. it wont usually be loud, but if you drive the vehicle everyday, you will notice a new noise that wasn't there before. it is not hard to replace but it is quite a bit higher than older style fan clutches

Posted on Nov 09, 2008

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

    Guru:

    An expert who has written 7 tips or uploaded 3 video tips

  • Master
  • 674 Answers

So emissionwiz
you are telling me a plugged cat will not cause a car to run hot?
the original question is running down the road the temp starts to rise around hiway speeds and when slowed down to an idle the car cooled off
by watching the temp guage

i tend to dissagree with you please explane your answer
thanks paul

Posted on Nov 02, 2008

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    Top Expert:

    An expert who has finished #1 on the weekly Top 10 Fixya Experts Leaderboard.

    Superstar:

    An expert that got 20 achievements.

    All-Star:

    An expert that got 10 achievements.

  • Chevrolet Master
  • 60,960 Answers

No to both.

Posted on Nov 02, 2008

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

2 Answers

99 ford taurus starts up but doesnt drive more than 10 miles per hour and temperature starts to rise


maybe a coolant thermostat that is faulty, a collapsed or perished hose..

It could also indicate cylinder head gasket/cylinder head problems.

Ten miles is about the correct distance for a car engine to reach normal operating temperature. If your temperature gauge continues to rise beyond normal ..ie. overheating .. you risk causing a lot of damage to your engine.

If you're not sure what to do or look for - get somebody to check it out for you

Jan 27, 2016 | 1999 Ford Taurus

1 Answer

How fix that problem


fix-problem-eyuevxexiacaa0vc32pfdm3j-5-0.jpg
Nitrous Oxide NO is created when an engine's combustion chamber temperature reaches over 2500F. 1. Lean Fuel Mixture - Lean fuel mixtures cause high NOx. A lean fuel mixture exists when less fuel then required is delivered to the combustion chambers or when more air then necessary is added to the fuel. In either case the lack of gasoline needed to cool the combustion chambers down is not present. Combustion temperatures increase causing high nitrous oxide emissions. A lean fuel condition may be due to a vacuum leak/s and/or defective fuel control components, such as the Air Flow Meter, Engine Coolant Temperature Sensor, and O2 sensors.
2. Defective EGR System - The Exhaust Gas Recirculation system is designed to reduce NO. The EGR system consists of an EGR valve, EGR pressure sensor, vacuum hoses, and one or more vacuum switching valves or solenoids. newer vehicles may use an electronically controlled EGR valves, which do not require vacuum lines or switching solenoids.
The EGR system's job is to re-route a small amount of exhaust gas back into the intake manifold to help reduce combustion chamber temperatures. As mentioned above NOx is created when combustion chamber temperatures reach above 2500F.
By recirculating exhaust gas back into the intake, a small amount of the air/fuel mixture is replaced with inert gas, reducing combustion temperatures.
3. Defective Catalytic Converter Some vehicles operate without EGR valves. Non-EGR equipped vehicles rely heavily on the Catalytic Converter to assist in the reduction of NO. These vehicles have tendencies to develop CAT problems sooner then those which are equipped. If you own a non-EGR equipped vehicle, and have failed the emissions test for high NOx, pay close attention to the Catalytic Converter.
4. High Engine Mileage - Over an engine's lifetime, carbon build-up develops in the engine's combustion chambers. The more miles on your engine, the more carbon build-up on the pistons, cylinder heads and valves. Carbon build-up decreases the available space for the air/fuel mixture to combust, and causes higher cylinder compression. High compression results in high temperatures and high NOx. Keep in mind this problem is usually seen in vehicles with over 150,000 miles which have been poorly maintained. The solution to this problem is called De-Carbonizing. It will remove a good amount of carbon out of an engine. This will increase combustion space, lower compression and lower NOx.
5. Engine Overheating - Inadequate engine cooling can will high NOx. If your vehicle's cooling system is not working efficiently, high NOx will be created. Remember high NOx nitrous oxide is created when an engine's combustion chamber temperatures reach over 2500F. You will want to make sure your vehicle's cooling system is working properly, and your vehicle's temperature gauge is always indicating normal.

Carbon Monoxide is a by-product of incomplete combustion. Carbon Monoxide exceeding maximum limits, can be due to a number of emission failures ranging from inadequate air intake to defective engine computer sensors. This condition is referred to as a "Rich Fuel Conditon".
1. Dirty Air Filter - The number one overlooked emissions component, yes, "emissions" component is the engine air filter. A dirty air filter will absolutely restrict air flow, thus disturbing the proper 14.7:1 air/fuel ratio required for optimum fuel combustion.
2. Faulty Oxygen Sensor The Oxygen Sensor is responsibly for delivering information to the ECU or ECM relating to the oxygen content in the exhaust stream after it has left the combustion chambers.
The engine control computer will determine how much fuel to inject into the combustion chambers based on this data. The more oxygen in the stream, the more fuel the computer will deliver, and visa-versa. A defective O2 sensor will cause increased carbon monoxide emissions.
3. Defective Manifold Absolute Pressure - The MAP sensor determines the level of vacuum created during an engine's intake stroke, and sends this information to the ECU. During low vacuum the MAP sensor assumes the engine's throttle is in some degree open, meaning you've stepped on the pedal. It relays this information to the ECU. The ECU, in turn, sends commands to the fuel injectors, or carburetor, to increase fuel delivery.
A defective MAP sensor will not report the correct information to the ECU, thus disturbing air/fuel ratio. Usually when the ECU senses a defective MAP sensor it will learn to ignore its data, and rely on preset values, and other sensors such as the Throttle Position Sensor, and Engine Coolant Temperature Sensor; Fuel delivery will not be as accurate and high CO may result.
4.Defective Throttle Position Sensor - Obviously a very important emissions sensor; the TPS relays information regarding the position of the air intake system's throttle plate. The throttle plate, located after the engine air filter and before the intake manifold controls the amount of air entering the combustion chambers. It is usually manipulated by the gas pedal via a cable. On late model vehicles the throttle plate may be controlled electronically. A defective throttle position sensor will confuse the ECU into thinking the vehicle's operator is demanding more or less fuel, when neither is really neccessary. Most often a faulty TPS will cause high CO, as an engine's ECU always prefers to send more fuel rather then less, in an effort to avoid a lean fuel mixture and subsequently higher engine temperatures.5. Defective Engine Coolant Temperature Sensor - Low engine temperature requires more fuel. When the ECU is unable to determine what the engine's accurate temperature is, it will not adjust fuel delivery properly; resulting in high CO. As explained above, the Engine Control Computer prefers to send more fuel rather then less to avoid a lean fuel mixture.

Hydrocarbon HC. Hydrocarbons are basically raw fuel, otherwise known as Gasoline. High Hydrocarbon (HC) emissions are almost always a sign of poor fuel ignition. However, it's not always that the engine's ignition system is responsible for high Hydrocarbon emissions.1. Improper Ignition Timing - Engine ignition timing is measured in degrees before or after Top Dead Center. Example of an ignition timing failure would be in the case where an engine's ignition timing is required to be set at 10 degrees Before Top Dead Center and instead is set to 15 degrees BTDC. This fault will not only cause a smog check "functional failure", but will increase Hyrdocarbon (HC) emissions as well. California allows 3 degrees +/- off of the manufacturer's required setting. Newer vehicle's may not have a distributor, and and no timing adjustment will be needed. On these engines timing is electronically controlled by the ECU.
2. Defective Ignition Components Your vehicle's ignition system consists of the ignition coil/s, distributor, distributor cap, distributor rotor, ignition wires, and spark plugs. If any of these components are defective the engine will produce high hydrocarbons. A common reason ignition components perform poorly is due to carbon build-up. High ignition voltage traveling through the air pockets within these components form carbon. Carbon acts as an insulator between paths of electricity, decreasing the energy required at the spark plug to ignite the air/fuel in the combustion chambers properly.
3. Lean Fuel Mixture - Any condition which will cause unmetered air to enter the intake manifold, and ultimately the combustion chambers, will cause high hydrocarbons (HC). This condition is called a lean miss-fire. Such faults as vacuum leaks and gasket leaks will cause lean fuel/air mixtures. Broken, disconnected or misrouted vacuum hoses will do the same. It is also important to note that many engine components rely on engine vacuum for proper operation. If any of these components are defective, externally or internally, they may cause large vacuum leaks as well.
4. Defective Catalytic Converter - A defective catalytic converter may be responsible for high HC, CO, and NOx emissions. The Catalytic Converter, commonly referred to as the CAT is a component designed to continue the combustion process within itself and emit a more thoroughly burned and less harmful emissions containing exhaust. The most accurate way to find out if your vehicle's CAT is working efficiently is by using an exhaust gas analyzer. Unfortunately this tool is fairly expensive.
Some obvious symptoms of a bad CAT could be any of the following:
a. Major loss of power over 15-25 mph. This may be an indication that the catalytic converter is plugged up and restricting exhaust flow.
b. Strong sulfer or rotten egg smell emitting from the exhaust on an otherwise good running vehicle. This may be an indication that the Catalytic Converter isn't burning fuel completely, instead storing it, then releasing it as hydrogen sulfide.
c. Loud rattle being heard from inside the CAT. This may indicate a broken Catalytic Converter substrate. You may want to insure this sound is not due to loose exhaust components.
5. Defective Air Injection Components - Faulty smog pump and related emissions system components will cause high HC. The air injection system is designed to introduce additional oxygen, after the metering system, to the engine exhaust as it exits the exhaust manifold, or directly before it enters the Catalytic Converter; thus burning whatever remaining fuel (HC) in the exhaust completely.
6. Low Cylinder Compression - This fault is one of the less common high HC causing problems. Reasons an engine may have low or no compression in one or more of its cylinders may include things such as burned intake or exhaust valve/s, defective valve guides and/or seals, defective piston rings, and burned head gasket/s. A wet/dry cylinder compression test will diagnose this fault. More then often if such a problem exists it will be very apparent. You should notice rough idle.

Feb 19, 2015 | Cars & Trucks

1 Answer

Trouble codes p0118 temperature po118


code p0118 refers to engine coolant temperature (ETC) sensor ---circuit malfunction===causes---coolant thermostat---wiring open circuit/short to positive---wiring short to ground---ground wire defective---ECT sensor.. The temp gauge works off a temperature sender unit separate to the coolant sensor and if it is reading 100 then it indicates an overheat situation in the engine . Probably why the engine light is coming on. As the thermostat is in the list of causes I would replace it as a precaution. The coolant sensor is what tells the CPU to turn on the electric fans to cool the radiator

Jan 13, 2014 | 2004 GMC Envoy

1 Answer

Engine temperature suddenly too high when driving


if the car in the process of operation, coolant temperature gauge indicatorquickly reached 100 degree, or launch in the cold car, engine coolanttemperature rises rapidly to boiling, to make up for the coolant to normal, but the engine power output decreased significantly, the mechanical system of engine system failure. The cause of the fault of cooling system are: seriousWater Leakage; cylinder pad insulation jacket and cylinder impact; the thermostat main valve off; fan belt loosening or fracture; pump shaft and impeller loose; fan clutch side. Use obd2 for automotive diagnostics , you can improve vehicle safety performance and driving more safer.

Dec 09, 2013 | Ford Cars & Trucks

1 Answer

Boiling coolant


Hi Innocent, There are several reasons why the coolant can overheat in a cooling system. Make sure that the cooling fans are cutting in when the temperature gauge is at just under the halfway mark. the fans should cut in and then after a short interval, stop. The most common cause is loss of coolant which is often related to a defective radiator cap. The cap is actually a pressure valve and when defective causes coolant lose. Another cause can be leakage from the core plugs or radiator hoses or metal piping. a 'blown' cylinder head gasket is another cause. If the timing belt has recently been replaced and the problem began at that time, the problem could be caused by incorrect installation of the belt causing the valve timing to be incorrect. I suggest you have a cooling system pressure test carried out, which will often pin point the cause if it is a leakage. Regards John

Oct 12, 2013 | Mazda Cars & Trucks

1 Answer

Replaced thermostat on pontiac sunfire now there's smoke coming from coolant tank


Sounds like you have a leaking head gasket or damage to the engine from when it overheated.
A leaking head gasket can cause compression to leak into the cooling system and pull coolant into the cylinders which is burned out the exhaust. It does not have to leak into the oil.
A shop would check for exhaust gas in the cooling system and run a compression test on the cylinders.

Mar 04, 2013 | 2002 Pontiac Sunfire

1 Answer

'96 Honda Civic overheating. temp gauge will rise almost to the red & then after a few seconds drop quickly to where it should be. After about 40/50 miles tends to hover at the high point. water is...


You need to have your system pressure tested. There is obviously a leak which is causing an air pocket. The pocket causes the temperature fluctuations. This could be as simple as a pinhole leak that caused the pocket over time or as complex as a head gasket allowing pressure to build up in the coolant system can cause fluent to leak out the overflow.

Sep 27, 2011 | 1996 Honda Civic

1 Answer

Ok so my engine is making a ticking sound in the far back what is it?


My guess is that it's a lifter. It's best to talk with a dealership mechanic about the best course of action with your specific vehicle. Usually a engine will last a very long time with a lifter tick. And don't forget to always check for recalls on all the cars you own. Here is a couple I found for your call. In this case it has nothing to do with your ticking problem but for future reference its always a good idea to make sure it's not part of the problem.
Auto Recall Date:MAR 23, 1994 Vehicle Component: POWER TRAIN:MANUAL TRANSMISSION Estimated Vehicles Affected:31295 1992 Subaru Legacy Defect Summary:WHEN THE VEHICLE IS DRIVEN CONTINUOUSLY UNDER EXTREMELY COLD TEMPERATURES (-22 DEGREES F.) AND HIGH HUMIDITY WEATHER CONDITIONS, THE TRANSMISSION BREATHING (AIR) VENT CAN BE BLOCKED DUE TO MOISTURE FREEZING AT THE OIL LEVEL GAUGE. IF THIS OCCURS, PRESSURE INSIDE THE TRANSMISSION CASE WILL INCREASE AND PUSH OUT THE REAR OIL SEAL, CAUSING TRANSMISSION OIL LEAKAGE. THE LACK OF LUBRICATION CAN BURN THE INTERNAL COMPONENTS OF THE TRANSMISSION, CAUSE THE TRANSMISSION TO SEIZE AND THE VEHICLE TO COME TO A SUDDEN STOP. Defect Consequence:SUDDEN STOPS WITHOUT PRIOR WARNING CAN CAUSE VEHICLE OCCUPANTS TO BE THROWN AROUND THE VEHICLE AND CAUSE LOSS OF VEHICLE CONTROL WHICH CAN RESULT IN AN ACCIDENT. Remedy:DEALERS WILL MODIFY THE OIL GAUGE PIPE AND MODIFY THE OIL LEVEL GAUGE (DIPSTICK) OR REPLACE IT, DEPENDING ON THE TYPE OF DIPSTICK IN THE VEHICLE. Notes:SUBARU OF AMERICA, INC. Auto Recall Date:APR 01, 1992 Vehicle Component: FUEL SYSTEM, GASOLINE:STORAGE:TANK ASSEMBLY Estimated Vehicles Affected:9500 1992 Subaru Legacy Defect Summary:A MISALIGNMENT OF THE REAR SEAT CUSHION LATCHING BRACKET REINFORCEMENT PLATE TO THE FLOOR REQUIRED A MACHINE TAP TO CLEAR THE OPENING FOR A MOUNTING BOLT. THE TOP OF THE FUEL TANK MAY HAVE BEEN PUNCTURED WHEN THE TAP WAS USED. Defect Consequence:THE PUNCTURE IN THE TOP OF THE FUEL TANK COULD CAUSE FUELTO LEAK, WHICH COULD RESULT IN A VEHICLE FIRE WHEN LEAKS OCCUR NEAR A SOURCE OFIGNITION. Remedy:INSPECT THE FUEL TANKS; REPLACE THEM IF THEY ARE PUNCTURED. Notes:SUBARU OF AMERICA, INC.

Jun 25, 2010 | 1992 Subaru Legacy

1 Answer

Temperature gauge goes up all of the sudden


It sounds like you have air in the Cooling system and the bars leak permanent seal does not help. The sealer creates restrictions through out the water jackets and can cause the thermostat to stick. Replace the radiator cap and run the truck with the radiator cap on the first click and keep an eye on the over flow tank, refill the over flow as needed and make sure you have the heater on the highest setting to work out all the air in the system. Once all the air has worked it's way out of the system, then you can close the radiator cap to the second click to ensure full pressure is built up in your cooling system. Good luck and keep me posted.

Dec 09, 2009 | 1998 Ford Expedition

2 Answers

Car over heating. tempature gauge fluxuates


Your overheating problems can have several possible causes.
1) Airlock in heating system - solution - bleed air from cooling system. Method is dependent on make/model of vehicle
2) Radiator blocked - solution - drain and flush radiator
3) Failed waterpump - solution - fit new waterpump
4) Engine thermostat stuck in closed position - solution - fit new thermostat
5) Electric cooling fan (if fitted) failing to operate - solution - check fan, fan operating switch, all wiring and connectors
6) Not enough coolant in system - solution - check and top up to required level. Also check all hoses for sign of leakage.
7) Faulty temperature gauge giving incorrect reading

Jun 21, 2009 | 2001 Jaguar XJ8

Not finding what you are looking for?
2004 Chevrolet TrailBlazer Logo

229 people viewed this question

Ask a Question

Usually answered in minutes!

Top Chevrolet Experts

yadayada
yadayada

Level 3 Expert

60867 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

21949 Answers

Jeff Turcotte
Jeff Turcotte

Level 3 Expert

6811 Answers

Are you a Chevrolet Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...