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94 Roadmaster service engine light question

Resievil

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Buick Roadmaster
I got a 94 that I've had for awhile and I have done minor upgrades and most the maintenence that should be done to a car with 150k on the clock. Recently I've been having a issue where I'll leave the car idle when I run into the store to grab something to drink on my way into work and the engine fan will kick on full blast and the check engine light comes on. It also, smells like there is some burning oil but I have the valve cover gaskets replaced not too long ago. I was wondering if anyone has had a similar issue.
 

MelsRegal

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It sounds like your engine is overheating at idle.
Have you checked the coolant level when the engine is cold?
Have you tried duplicating the situation at home and checked what code is being thrown?
 

HotZ28

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1996 Roadmaster Limited Collectors Edition 58k - 1996 PAU
10-4 on the overheating! I recently had the same problem with my '96 RMS and found the thermostat locked in the closed position. I replaced it with a "fail safe" thermostat that will stay open if it fails. All the overheating problems were then resolved!
 

Resievil

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I didn't consider overheating that much because the temp gauge wasn't climbing. The coolant levels seemed fine. I really haven't had much off with the car other than what I've already mentioned. Would it be a good idea to have the coolant system flushed?
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HotZ28

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1996 Roadmaster Limited Collectors Edition 58k - 1996 PAU
The coolant sensor my also be misreading, especially if the system is clogged with an old original coolant! Have that coolant system flushed several times and replace the thermostat & temp sensor!
 

Resievil

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The coolant system was pretty gummed up and I got it cleaned out as best you can but found that the issue with it smelling like it was running hot is that it has front main seal leak. Slow leak but it's just enough that it spit a little oil on the under carriage of the car and exhaust and burning off. So, on to the next thing.
 

kiltedscotsman

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But not a serious enough leak that a little dollop of oil every now and again won't cure? I think most of us have oil leaks, I suppose on old cars it's just part of the package. I asked about fixing an oil leak at my local mechanic and he said they can find it, but it's a helluva faffing around to find which seal it is, shampoo and steam clean the engine, use a dye... figured unless its pissing out like a racehorse pees, he said live with it and keep an eye on it, regularly check level.
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