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I have a 2003 GMC Envoy - I had a new catalytic converter and new exhaust system installed due to loss of power. Was told everything else checked out fine and rear resonator did sound loose and was m

New plugs were put in back in February due to sputtering. Dealership steered me somewhere else to deal with catalytic converter and exhaust. Asked them about vibration, they said the exhaust was in a bind. Mechanic who installed exhaust system rechecked, stated exhaust not in a bind, hydraulic motor mount on engine could need adjustment to quiet engine when in drive. Envoy has 127,000+ miles on it but ran perfect up until the problem in February. I bought it with 7,000 miles on it in 2003 and serviced it every 3 months with oil changes and whatever timely services were encouraged.

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6ya6ya
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Posted on Jan 02, 2017

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SOURCE: Noise and Vibration

I replaced the lower passenger side engine mount and the vibration is still there but a bit less vibration. The lower passenger mount was worn out. I was told by the Dodge service dept that it takes 5 hours to change the main hidden engine mount which is mid way up the passenger side of the engine. That main hidden mount cost 75.00

To get to it you would have to remove the wheel, inner fender plastic work, windshield washer fluid tank, and etc.

Posted on Nov 18, 2008

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Scorpedo
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SOURCE: car dies when driving,check engine light comes on.

There is a good chance it could be your fuel pump , however if the check engine light is coming on and the dealer cant tell you what is wrong , try a different dealer or another shop. Second opinions never hurt.

Posted on Dec 12, 2008

keithheavili
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SOURCE: 2003 Buick Regal Service Engine Soon light.

The error that I'm showing for error code P1133 is 
P1133 Heated Oxygen Sensor (HO2S) insufficient switching bank 1 sensor 1(Rear Bank).  I would suggest having both of your Oxygen Sensors replaced if you haven't already had that done.  Hope this helps.  Thanks for an honest rating and for using FixYa.

Posted on May 19, 2009

  • 77 Answers

SOURCE: SMALL PROBLEM ROUGH IDLE.SMALL VIBRATION WITH

You need to find out what DTC the vehicle sets when the check engine light comes on. This will help you diagnose the problem. The engine is misfiring causing the rough running concern and probably the vibration in the dash. The DTC will tell you what specific cylinder the misfire is in P0300-304 or if the fuel is metering too lean P0171. Then you can check the appropriate system for a fault. you'll need to get a generic OBD2 code puller (local parts stores sells these things). let me know what specific DTC's you pull and I'll see if I can help you further.

Posted on Jan 26, 2010

01fordeb
  • 1033 Answers

SOURCE: vibration when idling in drive

check your pulley's. Sounds like one of them are bad and causing movement which where the vibrations coming from. A friend of mine had the same problem, his was the fan pulley. It could be moved inward and outward a little but enough to cause the engine to vibrate. The bearings were going out. check it out and let us know what you come up with.

Posted on Jan 27, 2010

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2003 gmc envoy... I was told i needed a fan clutch.... Then. Next thing i know check engine soon, reduce engine power... Whats going on then computer... P1221, 1271, 1635 still not fix


if you were told that the fan clutch needed replacing and you did not do that , then the engine light and the loss of power would be a result of overheating of the engine and it going to limp mode
take it to a gm service centre for a explanation of the fault codes

Feb 12, 2017 | 2003 GMC Envoy

1 Answer

My 2003 chevy impala just loses power while driving, it seems like its choking for a while then regains power again and runs normal


have car checked for a plugged catalytic converter by a reputable technician. A clogged catalytic converter results in a loss of power. The catalytic converter is made of an aluminum oxide honeycomb coated with platinum and palladium. These components react to remove CO and HC's from the exhaust stream. A two-way catalytic converter works by oxidizing CO (carbon monoxide) and HC (hydrocarbons "unburned fuel") to CO2 (carbon dioxide) and water. A three-way catalytic converter also removes NOx (oxides of nitrogen) from the exhaust. NOx is formed at high cylinder temperatures. The EGR system is responsible for inhibiting NOx. Signs of clogged bad catalytic converter

Jan 17, 2016 | Cars & Trucks

1 Answer

How can I tell which catalytic converter is bad on my 2005 Pontiac g6


If its restricted there will be a loss of engine power. If exhaust has the rotten egg smell converter is over worked due to excessive fuel, check fuel system. Restriction can be checked with a vacuum gauge. Connect gauge to full manifold vacuum, speed engine to about 1800 rpm's vacuum should rise if vacuum decreases there is a restriction in the exhaust system.

May 18, 2014 | 2005 Pontiac G6

1 Answer

Slowing down to go up hill hard to press the gas


Your catalytic converter sounds like its clogged...When clogged it restricts exhaust and puts excessive back pressure on motor causing loss of power ,especially when engine is under load.(going up hill).ONE WAY TO SEE IF THIS IS THE PROBLEM IS TO LOOK UNDER VEHICLE WHEN PROBLEM OCCURS...tHE EXHAUST PIPE BEFORE THE CATALYTIC CONVERTER WILL BE GLOWING DUE TO RESTRICTION....

Apr 04, 2011 | 2003 Mazda Mazda6

1 Answer

2003 ford focus catalytic converter location


SECTION 309-00: Exhaust System 2003 Focus Workshop Manual DESCRIPTION AND OPERATION Procedure revision date: 01/24/2003 Exhaust System adobe.gif Printable View (214 KB) Vehicles with 2.0L Zetec-E enginee0008758.gif
Item Part Number Description 1 - Bracket 2 - Gasket 3 - Catalytic converter 4 - Bracket 5 - Gasket 6 - Front muffler 7 - Rear muffler 8 - Hanger 9 - Flexible pipe

Vehicles with 2.0L SPI enginee0010349.gif
Item Part Number Description 1 - Gasket 2 - Catalytic converter 3 - Bracket 4 - Gasket 5 - Front muffler 6 - Rear muffler 7 - Hanger 8 - Bracket 9 - Flexible pipe

Vehicles with 2.3L PZEV Enginea0072697.gif
Item Part Number Description 1 5G232 Catalytic converter 2 5K222 Mounting bracket 3 5K282 Head shield 4 9451 Gasket 5 5A262 Insulator 6 5E292 Converter and muffler assembly 7 9448 Gasket 8 5G203 Flex Pipe NOTE: The exhaust systems shown in this section are production systems.
The exhaust systems are of a two-piece construction for production and five-piece construction for service.
Catalytic Converter
The catalytic converter fitted to the Focus range resembles a small muffler. Because of the high temperatures at which the catalytic converter operates, the vehicle body areas around the catalytic converter are protected by heat shields. The catalytic converter controls three emissions; Hydro carbons (HC), carbon monoxide (CO) and oxides of nitrogen (NOx).
Catalyst deactivation due to poisoning
Sulphur (S) in the fuel can cause deactivation of the catalyst.
Lead (Pb) in fuel can cause a severe deactivation at levels above 5 mg per liter of fuel. It is therefore essential that vehicles with catalytic converters always operate on unleaded fuel.
Zinc (Zn) and phosphorus (P) present in some oils, can cause deactivation if oil consumption is high.
The effect of sulphur is felt most if it is released from the catalytic converter as hydrogen sulphide (H2S). This has an unpleasant odor similar to rotten eggs. Changing the fuel manufacturer may help in reducing this phenomena.
To minimize H2S emissions, it is essential that the idle CO level is within specification and that the engine emission system is functioning correctly. For additional information, refer to Section 303-08A or Section 303-08B.
ani_caut.gif CAUTION: If temperatures exceeding 900°C are achieved the catalyst substrates will start to deteriorate. It is important that the cause is defined and rectified if subsequent melts are to be prevented.
Catalyst melts are normally accompanied by loss of power due to excessive back pressure. For additional information, refer to Section 303-07A or Section 303-07B.
High substrate temperatures are caused by the ignition or the fuel systems. For additional information, refer to Section 303-07A or Section 303-07B.
Misfires at high engine speed may result in an almost instantaneous melt.

2010&c18=modelyear&c20=n720709&c35=wsm%2cexhaust%20system%2cs3y%2c309-00%2cdescription%20and%20operation&s=1366x768&c=32&j=1.3&v=y&k=y&bw=995&bh=405&ct=lan&hp=n&[aqe]

Mar 07, 2011 | 2003 Ford Focus

1 Answer

My GM Envoy 2005 reflects check engine signal. Upon checking the computer problem lies with catalyst system in exhaust pipe, may be due to corrosion. What is the solution?


There is no solution based of the info you have provided. You need to be a bit more specific. You say you checked the OBD system and the problem is the catalyst system. What is the code you pulled to determine this? It can be a number of different things o2 sensor, bad catalytic converter, too much back pressure, ect... depending on what trouble codes you pulled. If you can provide the codes then I can assist you and give you a solution.

Jan 24, 2011 | 2005 GMC Envoy Xl

2 Answers

My 2003 Matrix sometimes doesn't start at all and sometimes it starts fine, I took it to Autozone yesterday and they checked the battery and alternator and they said everything is working fine. (I took it...


If the catalytic converter is plugging up or plugged it will not allow the fuel into the cylinders and fire, due to back pressure on the engine. Do a exhaust check on the tailpipe by putting your hand or something over it and see if you have pressure there when the car is running.

Jun 18, 2017 | 2003 Toyota Matrix

1 Answer

Loud whooshing sound on acceleration. Came on instantly.


1st Any recent work done on vehicle? Air filter attached properly, filter element in correctly, hose clamps on air induction tight?
2nd Stand behind vehicle while it is running. Have someone slowly step on the gas pedal. Does the 'whooshing' sound seem to come from the exhaust pipe(s) when giving it gas? If yes, the catalytic converter pasrt of the exhaust system) may have partially collapsed inside (due to rust), and is partially blocking the exit of the exhaust gases. To fix this, you will need to replace the converter. If this is the case, check online for a new aftermarket unit, as they can be very expensive.

Mar 20, 2010 | 2003 GMC Envoy

3 Answers

Help with toyota corolla 2003 code P0420. Went to Autozone for check engine light help and they discovered BBCatalyst system efficiancy below threshhold-bank 1 Probable cause BB1. air leak in exhaust...


CODE PO420 CATALTYLIC CONVERTER SYSTEM FAULT.ITS SAYING FAULTY CATALTYLIC CONVERTER.IF IT BEEN A WHILE IF YOUR CAR HAS A WHOLE LOT OF MILES ON IT.YOUR SPARK PLUG CHANGE IS DUE AT 120000 MILES. DUE A LITTLE TUNE UP CHANGE AIR FILTER AND FUEL FILTER.SEE IF YOU HAVE ANY ENGINE FAULTS BAD PLUGS DIRTY INJECTORS ANY THING UP SET FUEL SYSTEM CAUSE CAR TO RUN RICH.EXCESSIVE UNBURN FUEL WILL GATHER IN CATALYTIC CONVERTER CAUSE IT TO BURN OUT.SHORTING LIFE OF THE CATALYTIC CONVERTER.

Aug 30, 2009 | 2003 Toyota Corolla

2 Answers

SEVERE LOSS OF POWER


check for a failed cat converter blocking the exhaust system

Apr 07, 2017 | 2003 GMC Envoy

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