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| Catalytic Converter http://www.gtfieros.com/phpBB3/viewtopic.php?f=6&t=779 |
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| Author: | dougbaker [ Sat Nov 07, 2015 10:47 am ] |
| Post subject: | Catalytic Converter |
3.4 OHV: Converters are normally supposed to last "the life of the car". Appeared OK before 8 year storage. Idles OK but no acceleration. Fuel pressure ok, new injectors, timing OK. I suspect converter. Any comments?? Subject to responses, I will try an exhaust pressure test ($90 meter). |
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| Author: | dougbaker [ Sat Nov 07, 2015 10:59 am ] |
| Post subject: | Re: Catalytic Converter |
I should add: glowing red headers at idle. |
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| Author: | BigB [ Sat Nov 07, 2015 11:48 am ] |
| Post subject: | Re: Catalytic Converter |
Mine used to do that as well (running rough, glowing headers). I believe way-back-when I attributed to a wiring issue to the O2 sensor causing what I believe to be a lean condition (Pennocks'). I should add, I have a refreshed 2.8 with custom exhaust from cat-back. |
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| Author: | Darn cars [ Sat Nov 07, 2015 6:19 pm ] |
| Post subject: | Re: Catalytic Converter |
Yes a clogged cat can do this but also a very lean condition will as well which can be a bad O2 as mentioned or failing injector or even a small exhaust leak in the wrong spot |
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| Author: | x-thumpr-x [ Sun Nov 08, 2015 10:33 am ] |
| Post subject: | Re: Catalytic Converter |
If it's been in storage for 8 years, I would look at the exhaust system. Might want to remove the cat, there may be a nest in there by now. Won't be the first time I've seen some critters make a home in the exhaust system. There's a chance the honeycomb inside the cat has come loose after all this time and is now blocking the air flow. |
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