Catalytic converter is glowing red

Tiny
OTISP23
  • MEMBER
  • 2002 FORD ESCAPE
Engine Mechanical problem 6 cyl Four Wheel Drive Automatic 160000 miles

from everything i've been reading this sounds like a fuel pressure regulator or a fuel injector problem, but my manual says nothing about a pressure regulator. Should I just go ahead and change the injectors or is there a pressure regulator or could it possibly be something else. Thanks for the input
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Sunday, November 15th, 2009 AT 9:08 PM

4 Replies

Tiny
MATHIASO
  • MEMBER
Hello otisp23

Check to make sure the air diverter valve is not stuck open because it sounds like it is allowing extra air into the exhaust system causing the catalytic converter to glow red hot. Check to make sure the control valve is not stuck open as well.

Here are some guides to help you see what I am talking about

Please let us know what you find.

Cheers
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Tuesday, November 17th, 2009 AT 2:01 AM
Tiny
OTISP23
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Per your suggestion, I have checked the fuel pressure and found the following: 65 PSI.
Looking in my Chilton Manual it shows that the PSI should be 39-55 PSI for the 2002 V6 engine. I may be thinking to hard but the sticker on the car door shows shows that it has a manufactured date of August 2001. Does that matter (manufacture date vs. Model year?). If so, looking at my manual for a 2001 engine the PSI range is 35 - 65 PSI.

A little history. The car had been sitting over the summer (It had needed new spark plugs but didn't change). Battery died, didn't know for how long battery had been dead. Recharged battery car did not start, barely firing so then changed spark plugs replaced with NGK Laser Platinum plugs (PTR5f-=11 6579).

Car started with new plugs just fine (the wires are on the correct plug I changed one at a time so no chance of crossover).

Did test drive and that is when catalytic converter glowing red issue started. And barely ran. I then ran OBDII test on car computer despite no engine light being on and came up with two codes: P0172 - "System too rich (Bank I), which would explain the "glowing cat" but why is it too rich? The second code was a Tranny code P0720. Also before car was parked for summer there were no codes indicating a possible problem.

Even though the car seems like it is idling fine I checked the air diverter valve and sure enough the valve has stuck open so I replaced it and the problem is fixed.

Thanks 2carpros! You guys are great!
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Tuesday, November 17th, 2009 AT 8:38 PM
Tiny
MATHIASO
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Good to hear I did run across some moe information on the problem for others that visit this post.

If there is no engine light but you pull out codes.
If there are no pending codes, then the light bulb burn out.

The code P0172 means rich, we may agree tha rich fuel has caused catalytic to glow.
The fuel pressure is normal.

The MAF (Mass Air Flow) Sensor is dirty or faulty need to be checked and cleaned.
There could be a vacuum leak.

Possible Solutions

Inspect all vacuum and PCV hoses, Clean the MAF sensor. I find it's best to take it off and spray it with electronics cleaner or brake cleaner. Make sure you are careful not to damage the MAF sensor, and make sure it's dry before reinstalling Inspect fuel lines for cracks, leaks, or pinches Check the fuel injectors, they may be dirty. Use fuel injector cleaner or get them professionally cleaned/replaced. Check for an exhaust leak before the first oxygen sensor (this is unlikely to cause the problem, but it is possible)

Manufacturer diagnosis

Camshaft timing is incorrect, or the engine has an oil overfill condition EVAP vapor recovery system failure (may be pulling vacuum) Fuel pressure regulator is damaged or leaking HO2S element is contaminated with alcohol or water MAF or MAP sensor values are incorrect or out-of-range One of more fuel injectors is leaking '

P-0720

OSS defective
" OSS ground circuit open
" OSS ground circuit short to ground
" OSS signal circuit open
" OSS signal circuit short to ground
" Park-neutral switch code present
" PCM defective (OSS signal ckt def)
" Powertrain Control Module defective
" OSS harness intermittent defect

Most likely it's a bad OSS. The OSS is located on the back of the transmission.
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Wednesday, November 18th, 2009 AT 1:28 AM
Tiny
PEAR69
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You should use 2002 as the year..65 psi is too high. IMO - fuel injection pressure damper (or the fuel pressure regulator) is faulty..Check and test all he other things that mathiaso mentioned first - if you find the problem it will be cheaper than a regulator..

https://www.2carpros.com/articles/catalytic-converter-replacement

BTW - you still need a cat. converter -- and you should just replace all of the O2 sensors..
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Wednesday, November 18th, 2009 AT 1:56 AM

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