Question about 2003 Ford Escape

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My 2003 Ford Escape (3.0 V-6)was running fine when I noticed a hissing noise from the exhaust. A flex pipe right before the catalytic converter had a serious leak in it. I have 75,000 miles on it. It drove fine for one more day, but then the EGR valve cracked, apparently to relieve pressure because the engine still ran, but there was no real compression and the EGR made a louder hissing noise than the flex pipe did. Local Joe Mechanic tried to save me money and showed me that the cat.converter on the bottom was clogged. He said there is a 3-cat. conv. system and the first or second could be bad, but just replaced the third and the flex pipe along with the EGR valve. He said it might clog up again in the future from the first two cats. It runs fine, but I just want to know if this is going to be a short fix. I think I might trade it in and get rid of it while it looks fairly nice.

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You have to get the emissions readings done on it and find out if all of the emissions controls are doing their job properly. If something is causing clogging, it will show up during this test. (rich emissions) you would either have to repair the main cause or trade it in. Good Luck.

Posted on Mar 12, 2017


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Posted on Jan 02, 2017

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SOURCE: 2000 E-350 V-10. P0174 with exhaust fix

Before I even finished reading this i knew you had a clogged cat. If you have fixed everything you mentioned i would lean towards a clogged cat. This is a large reason this code pops up.

To check this you could pull that cat out and drive around and see if the code comes back, make sure to stay away from the police though.


Posted on Mar 03, 2010

  • 1 Answer

SOURCE: My 5.4 is idling ruff. Runs real ruff in gear and

Cat could be clogged but it sounds like you might have a bad sparkplug or sparkplug wire or you could have clogged fuel injectors - That would screw up the fuel mix going through your engine which would send raw fuel to the cat causing it to burn too hot.

Posted on Mar 18, 2010

  • 4 Answers

SOURCE: 2005 Ford Focus flex pipe repair

Advance auto and auto zone sell just the flex pipe. You will need to have someone cut the old one out and weld the new one in. costs about $20 for part vs $300 for pipew/catalitic converter attached.

Posted on May 02, 2010

SOURCE: My 5.4 is idling ruff. Runs real ruff in gear and

You have an overrich fuel condition.
That will make the Cat over heat and in time will ruin it.
Check for codes
Check for misfires
Check O2 Sensors.
Fix the engine driveablitiy issues, and hope converter is okey. Not likely if you caught it so late ,it is red hot.
A ten year old converter being clogged,would seem to me, to have been helped along ,by lack of necessary maintainance on the engine

Posted on May 12, 2010

  • 560 Answers

SOURCE: vacume leak fix.

you need to have it hooked up to a smoke machine you will find your leak p.s. look under the upper rad. hose

Posted on Jun 13, 2012

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2 Answers

Last time. I have Ford focus 2003 sedan dohc 2L. I lost a part from exhaust system. from back to front I see 1. tail pipe 2. rectangular box shaped part? Lunch Box? 3. missing part Muffler?

Starting from the front, coming off the exhaust manifold should have, 1. Exhaust pipe, 2. Catalytic converter, 3. Exhaust pipe, 4. Resonator, 5. Tail pipe. Also, there should be an Oxygen sensor somewhere around the catalytic converter.

Jul 02, 2017 | Ford Cars & Trucks

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What are part numbers and any accessories of the gaskets used on the y pipe single exhaust?

There are left and right catalytic converters and it looks like each has a flange gasket on each one where they connect with the exhaust pipe. The pipe connector at the manifold should be a taper flange without a gasket.
You can get the gaskets at most any auto parts store, or the Ford dealer. Left and right should be the same.

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My 94 taurus has a problem with acceleration, it does not have any power it will not make it over 35 mph there is a hissing noise when i push the gas all the way to the floor still no power. but my rpms...


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Your vehicle will still run if the exhaust is off. This does not mean that the catalytic converters are bad or good. If your vehicle was throwing codes before you removed the exhaust there is a good chance they need replaced, or if the exhaust coming out of the tailpipe smells bad they may need replaced as well.

Generally, Catalytic converters will last the life of your car unless they are damaged with something other than normal wear and tear.

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I have a 2001 ford escape with what i think is a vaccume leak. at first i thought it was a fuel filter issue but after changing that i still cant get it to rev up. itl idol but not much abouve that and i...

not vaccumn leak- if you rev engine and it stalls - it could be a melted catalytic converter- hissing is exhaust forcing its way out at pipe seals

Jun 07, 2011 | 2001 Ford Escape

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I own a 2002 Ford Escape, when I drove it this morning it wouldn't go faster than 20 mph, after about 5 minutes I heard a loud noise, then some air hissing, then the car started to accelerate but with a...

Josh, your catalytic converter is shot (plugged). This caused a back-up of exhaust into the egr system. Probably melted the flexible tubing to the sensor, and may have damaged the sensor and/or the egr valve itself. The hissing you heard was the exhaust venting from the egr system. The converter being plugged caused you to lose power until the exhaust found a way out of the engine via the egr system...

Dec 17, 2010 | 2002 Ford Escape

1 Answer

2005 Ford Focus flex pipe repair

Advance auto and auto zone sell just the flex pipe. You will need to have someone cut the old one out and weld the new one in. costs about $20 for part vs $300 for pipew/catalitic converter attached.

May 01, 2010 | 2005 Ford Focus

1 Answer

I have a 2003 Ford Escape with a PO420 error code. When I accelerate, it sounds like air is coming from my engine. What is the problem and what should I do?

Here's what the code means, P0420 -- Catalyst System Efficiency Below Threshold (Bank 1).
Causes: Bad O2 senor, bad catalytic converter, and/or leaking exhaust manifold.

The error is coming from the O2 sensor number 1 between the exhaust manifold and the catalytic converter. The sensor itself may not be the problem. From what your describing is maybe a leak coming somewhere near the exhaust manifold. This would set off the P0420 code. Look around the exhaust manifold down to the catalytic converter for leaks that will leave black marks from burned fuel. If this can't be easily found, you may have to take the car in and have the exhaust hooked up to a smoke machine. This will inject smoke into the tail pipe and any leaks will be found by the smoke coming out of it.

Nov 16, 2009 | 2003 Ford Escape

2 Answers

05 susuki forenza

Removal Procedure
1. Disconnect the negative battery cable.
2. Drain the engine oil from the engine crankcase.
3. Remove the exhaust flex pipe retaining nuts from
the exhaust manifold.
4. Remove the exhaust flex pipe retaining nuts from
the catalytic converter or the connecting pipe.
5. Remove the exhaust flex pipe.
6. Remove the oil pan flange–to–transaxle retaining
7. Remove the oil pan retaining bolts.
8. Remove the oil pan from the engine block.
Cleaning Procedure
1. Clean the oil pan sealing surface.
2. Clean the engine block sealing surface.
3. Clean the oil pan retaining bolts.
4. Clean the oil pan attaching bolt holes in the engine
5. Clean the oil pan scraper.
Installation Procedure
1. Coat the new oil pan gasket with sealant.
Important : Install the oil pan within 5 minutes after applying
the liquid gasket to the oil pan.
2. Install the oil pan to the engine block.
3. Install the oil pan retaining bolts.
Tighten the oil pan retaining bolts to 10 NSm (89 lb–in).
4. Install the oil pan flange–to–transaxle retaining
Tighten the oil pan flange–to–transaxle bolts to 40
NSm (30 lb–ft).
5. Install the exhaust flex pipe.
6. Install the exhaust flex pipe retaining nuts to the
exhaust manifold.
Tighten the exhaust flex pipe–to–exhaust manifold
retaining nuts to 35 NSm (26 lb–ft).
7. Install the exhaust flex pipe retaining nuts to the
catalytic converter or the connecting pipe.
Tighten the exhaust flex pipe–to–catalytic converter
or connecting pipe retaining nuts to 35 NSm (26 lb–ft).
8. Connect the negative battery cable.
9. Install the oil pan drain plug.
Tighten the oil pan drain plug to 35 NSm (26 lb–ft).
10. Refill the engine crankcase with engine oil.

Jun 14, 2008 | 2005 Suzuki Forenza

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