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Old 04-14-2006, 02:54 PM   #1
Petrus
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Default Damage from running rich?

I'm looking for a car and am avoiding anything that's had a BOV on it but should I be? What kind of damage am I looking at if I find a good deal? Farking blow-off valves
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Old 04-14-2006, 03:49 PM   #2
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I think mostly Carbon Build up in the cylinders and possibly Dead or almost dead Catalytic Converters.
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Old 04-14-2006, 03:51 PM   #3
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Quote:
Originally Posted by Master2192
I think mostly Carbon Build up in the cylinders and possibly Dead or almost dead Catalytic Converters.
doesn't running rich for long periods of time fork the life of sparkplugs?? Not a big deal though if it does.
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Old 04-14-2006, 04:01 PM   #4
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How hard is it to get rid of the carbon buildup? (aftermarked exhaust to "repair" cats? )
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Old 04-14-2006, 04:02 PM   #5
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or if you dont have cats than you have one less thing off your hands.. and your get the lovely pops of after fire
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Old 04-14-2006, 04:08 PM   #6
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carbon buildup could be taken care of with auto-rx, i think, maybe also some fuel injector cleaner like regane or techron? you could try B12 chemtool or seafoam as well.
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Old 04-14-2006, 04:17 PM   #7
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For the 2.0L WRX it's a real problem because of the cat in the up-pipe. Running rich dumps fuel onto the up cat and roasts it which can lead to pre-mature failure. When the up cat fails it is sent through the turbo blades taking it out.
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Old 04-14-2006, 05:15 PM   #8
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WOuld that be a gradual process or would it happen all at once, (so if the car was still operating properly and had the BOV removed it wouldn't have that problem in the future).?
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Old 04-14-2006, 05:46 PM   #9
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running a constant rich condition is bad. Rich from a BOV depending on how many miles its been on won't be that bad. Rich conditions lead to fouled plugs and injectors, destroyed cats, and in the worst case scenario you could end up with messed up valves and piston seals, but that's long term. BOV creates a rich condition for a second as long as you hear the bov for. (.5-2 seconds depnding on the bov)

The cat in the up pipe could destroy the turbo in one shot, it wont be gradual. Just buy a catless up pipe and problem is solved.
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Old 04-14-2006, 05:52 PM   #10
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Quote:
Originally Posted by Petrus
WOuld that be a gradual process or would it happen all at once, (so if the car was still operating properly and had the BOV removed it wouldn't have that problem in the future).?
It would happen all at once. The cat is ceramic, so once it cracks the whole mess lets loose. The problem with running rich, even due to a blow off valve, is you don't know how badly it's roasting that cat.
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Old 04-14-2006, 09:31 PM   #11
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I ran way rich for 1700 miles (my intercooler wasn't clamped to my throttle body). How soon should I start worrying bout replacing my cat?

thanks
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Old 04-15-2006, 05:32 AM   #12
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Quote:
Originally Posted by njskatchmo
running a constant rich condition is bad. Rich from a BOV depending on how many miles its been on won't be that bad. Rich conditions lead to fouled plugs and injectors, destroyed cats, and in the worst case scenario you could end up with messed up valves and piston seals, but that's long term.
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Old 04-15-2006, 06:47 AM   #13
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First off the stock BOV will keep you running a safe AFR fine since it recirculates back into the intake. If you ever 'NEED' to get a bigger BOV(read NEED meaning you're turbos too big for the stock one) you'd have to get a front mounted intercooler anyway- which you can then set the BOV before the MAF getting rid of the running rich issue on off throttles. Really so long as you don't intentially set your AFR rich in the ECU there's nothing to worry about. If you buy pre 06 I'd still recommend getting a new up pipe and checking it out- it really was a stupid idea to put a cat right before a turbo . If you get 06 it comes catless in the up-pipe already .
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Old 04-15-2006, 12:22 PM   #14
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06 wrx is catless in the up pipe too? OMG they made that car amazing.
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Old 04-15-2006, 02:20 PM   #15
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Quote:
Originally Posted by nich0lai
I ran way rich for 1700 miles (my intercooler wasn't clamped to my throttle body). How soon should I start worrying bout replacing my cat?

thanks
as soon as you get a CEL with an o2 sensor code. I doubt it was that big of a deal though.
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Old 04-15-2006, 02:48 PM   #16
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Quote:
Originally Posted by Petrus
I'm looking for a car and am avoiding anything that's had a BOV on it but should I be? What kind of damage am I looking at if I find a good deal? Farking blow-off valves
Back to the original post...

I flat-out wouldn't buy a car that wasn't 100% stock. You have no idea how it was used. especially if they have a bov without the correct supporting mods.
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Old 04-16-2006, 12:27 AM   #17
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The BOV may or may not cause damage. However, what does it say about an owner that would put that item on his car? What other bad choices did he make?
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