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10-15-2016, 08:43 PM
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#29
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Senior Member
Monaco Owners Club Workhorse Chassis Owner
Join Date: Aug 2002
Location: Clovis, CA, USA
Posts: 13,154
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Quote:
Originally Posted by bluepill
Remember that catalysts "eat up" hydrocarbons. This means that they can cover up oil consumption by eating the smoke that is produced by an engine that "Burns" oil.
You might want to try this:
Disconnect the exhaust pipe before the catalyst and run the engine. See if any grey/blue smoke comes out. If it does, follow standard diagnostics for oil consumption.
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That may explain why he had to have his catalytic converters replaced. Best find the problem or he may have to replace them again...Ouch.
__________________
2004 Monaco La Palma 36DBD, W22, 8.1, 7.1 MPG
2000 LEXUS RX300 FWD 22MPG 4020 LBS
Criticism is easier than Craftsmanship
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10-15-2016, 10:33 PM
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#30
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Junior Member
Join Date: Oct 2016
Posts: 13
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Quote:
Originally Posted by sbleiweiss
My son once told me "Daddy, a part of me hurts." Of course he was 4 at the time.
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Rich n Linda and yourself are a great help
Save your stupid comments !!!!
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10-16-2016, 07:37 AM
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#31
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Senior Member
Join Date: Oct 2014
Location: Port Orchard, WA
Posts: 4,217
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Quote:
Originally Posted by calmike4fun
Rich n Linda and yourself are a great help
Save your stupid comments !!!!
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Although off topic posts can be a little irritating, and don't help original poster address their issues, calling people stupid is perhaps not the best attitude to gain friends on this forum.
Others are trying to help. You might want to restrict your responses to those posters.
__________________
Scot & Laura Kellersberger, U.S. Army (ret)
Newmar 4 wheel drive Dutch Star 3891, SOLD
Now RV'ing on the water in a Trawler!
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10-17-2016, 08:11 AM
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#32
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Senior Member
Join Date: Feb 2010
Posts: 4,654
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Cat converters will be toast if run too rich...o2 sensor gets tired causing rich condition resulting in failure.
Too much oil same thing.
So assume real bad condition and start troubleshooting.
The computer will compensate the best it can so sometimes observations can be wrong.
However that much oil will be obvious.
Start by tooling up for a compression test and checking vacuum.
Do vacuum first as it is easy and it may show low vacuum indicating leak.
Buy or borrow a cimpressiin tester and get one with an extension hose.
Vacuum Guage is basic.
Many auto parts places load or rent them.
You need to pull all the plugs to do it properly and "reading the plugs" is what we did in the old days.
Look at them to see what they tell you.
A wet one or heavy carbon will indicate issues
Get masking tape to label each one as you pull them out.
Once out do compression test.
Take notes and photos of plugs for us to see and advise.
Leaky intake can cause this as can bad rings.
__________________
Tony & Lori
1989 Country Coach Savannah SE
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10-17-2016, 03:33 PM
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#33
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Senior Member
Join Date: Dec 2014
Location: High up in Arizona
Posts: 2,050
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I have never heard of any vehicle losing 2.5 quarts of oil in 150 miles without any sign of leak, smoke or something so I am very curious what may be the cause of this mystery. Will there be any updates I wonder? 
__________________
2019 Allegro Bus 37AP towing a Jeep JK Rubicon Wrangler
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10-17-2016, 10:35 PM
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#34
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Junior Member
Join Date: Oct 2016
Posts: 13
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Quote:
Originally Posted by TQ60
Cat converters will be toast if run too rich...o2 sensor gets tired causing rich condition resulting in failure.
Too much oil same thing.
So assume real bad condition and start troubleshooting.
The computer will compensate the best it can so sometimes observations can be wrong.
However that much oil will be obvious.
Start by tooling up for a compression test and checking vacuum.
Do vacuum first as it is easy and it may show low vacuum indicating leak.
Buy or borrow a cimpressiin tester and get one with an extension hose.
Vacuum Guage is basic.
Many auto parts places load or rent them.
You need to pull all the plugs to do it properly and "reading the plugs" is what we did in the old days.
Look at them to see what they tell you.
A wet one or heavy carbon will indicate issues
Get masking tape to label each one as you pull them out.
Once out do compression test.
Take notes and photos of plugs for us to see and advise.
Leaky intake can cause this as can bad rings.
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thank you for the info. will start to get to the bottom of this asap
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10-17-2016, 10:39 PM
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#35
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Junior Member
Join Date: Oct 2016
Posts: 13
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Quote:
Originally Posted by 530ktm
I have never heard of any vehicle losing 2.5 quarts of oil in 150 miles without any sign of leak, smoke or something so I am very curious what may be the cause of this mystery. Will there be any updates I wonder? |
yes i will keep you updated on this mystery. Will be going on another short trip to the beach . I will be checking oil prior , during , and after we get back
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10-17-2016, 11:23 PM
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#36
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Senior Member
Monaco Owners Club Workhorse Chassis Owner
Join Date: Aug 2002
Location: Clovis, CA, USA
Posts: 13,154
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I'm curious about the oil and filter you use and how often you change it.
__________________
2004 Monaco La Palma 36DBD, W22, 8.1, 7.1 MPG
2000 LEXUS RX300 FWD 22MPG 4020 LBS
Criticism is easier than Craftsmanship
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10-18-2016, 08:56 AM
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#37
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Senior Member
Join Date: Dec 2014
Location: High up in Arizona
Posts: 2,050
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Quote:
Originally Posted by Arch Hoagland
I'm curious about the oil and filter you use and how often you change it.
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He said in post #14 he uses 5w/30, no mention of filter. Not much need to change either considering he goes through an oil change per tank of gas. 
__________________
2019 Allegro Bus 37AP towing a Jeep JK Rubicon Wrangler
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10-19-2016, 01:17 AM
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#38
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Junior Member
Join Date: Oct 2016
Posts: 13
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Quote:
Originally Posted by 530ktm
He said in post #14 he uses 5w/30, no mention of filter. Not much need to change either considering he goes through an oil change per tank of gas. |
not sure on the oil filter i believe my RV mech is using ac delco filter.
i will start checking out : cooling system contamination and oil leves prior to my trip to the beach.
then going to start digging deeper into this mystery.
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10-19-2016, 07:29 AM
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#39
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Senior Member
Join Date: Feb 2010
Posts: 4,654
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Avoid driving unit until this is solved as the cats will be toast again...They fail fast under these conditions.
You may consider removing them until fixed or needing to smog again...
__________________
Tony & Lori
1989 Country Coach Savannah SE
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10-20-2016, 12:40 AM
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#40
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Junior Member
Join Date: Oct 2016
Posts: 13
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Quote:
Originally Posted by TQ60
Avoid driving unit until this is solved as the cats will be toast again...They fail fast under these conditions.
You may consider removing them until fixed or needing to smog again...
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Good call i will probably do just that.
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