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/cgi-bin/YaBB.pl General Category >> Rubber Side Down! >> Petcock issue! Help! /cgi-bin/YaBB.pl?num=1338247550 Message started by robb+ on 05/28/12 at 16:25:50 |
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Title: Petcock issue! Help! Post by robb+ on 05/28/12 at 16:25:50 Hey my name's Rob, and I'm new to the forum! I've got a '95, and I'm pretty sure my stock petcock has failed or is failing. I've read the thread on the testing it. In multiple different ways, I've plugged up both the vac line from the petcock and the port on the carb, but it seems to run worse that way. I do have the petcock set to prime as well. The symptoms are really rough starts, cutting out in traffic when I slow down (real scary), and I can't really go much faster than 70 unless going down a slope. Just to test while riding, I've put my finger over the vac port of the carb, and every time it starts to sputter and run worse. Any suggestions? I was gonna go grab a raptor petcock from Babbits by me tomorrow but I'm not so sure that is the complete issue anymore. Help?! |
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Title: Re: Petcock issue! Help! Post by Dave on 05/28/12 at 16:30:32 It sounds more like you have dirty carb issues.....than a petcock issue. The engine should run very badly with the port for the petcock open - as that would be a serious vacuum leak. |
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Title: Re: Petcock issue! Help! Post by arteacher on 05/28/12 at 16:31:25 Sounds to me like the screens on your petcock are plugged up. Drain the gas, remove your petcock and clean the screens. |
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Title: Re: Petcock issue! Help! Post by robb+ on 05/28/12 at 16:34:21 That's what I had originally thought too. But before I even thought petcock, I pulled the drain plug on the float bowl to only find clean gas. I also have a run a few full tanks with seafoam in it, and it still runs awful. |
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Title: Re: Petcock issue! Help! Post by Routy on 05/28/12 at 16:47:46 You are suffering from "petcock paranoia" that is more than abundant on this forum. Get over it,.....pretend you never read about all the problems that were supposedly caused and not solved by "Raptorizing", and get after the real problem, which as was said is probably dirty carb related. |
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Title: Re: Petcock issue! Help! Post by robb+ on 05/28/12 at 17:40:38 But if the carb was the issue, the bike shouldn't just turn off ya know? It should definitely sputter like it's running out of gas, but it doesn't. I'm all for a dirty carb being the problem. One another note, the petcocks have failed on enough of these bikes that there are several threads about it, and it's a '95 with the stock part. I'm not being paranoid. I'm being realistic. Don't get mad. |
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Title: Re: Petcock issue! Help! Post by robb+ on 05/28/12 at 17:42:07 676C6C656966677D7C080 wrote:
I'm gonna try this right now! |
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Title: Re: Petcock issue! Help! Post by Serowbot on 05/28/12 at 19:24:41 4D4258435F594A48404E592B0 wrote:
Routy,.. I didn't put the petcock test in the Tech Section to fool anybody... It is a test... It should be done when there is a fuel problem, to rule out possible petcock problems, before messing with the carb and throwing everything off... I'm sure you agree, that wouldn't be a good thing... robb+ did the sensible thing in checking it... Now,.. he can more confidently track down the problem... robb+,.. good job so far... Before tearing in to the carb... also check that your gas tank is venting properly... Cali models have a vent tube, all other US models vent through the cap... Listen for hissing when you remove the cap (it shouldn't)... and if you catch it when it's stumbling, try taking the cap off, and see if it smooths out after a minute... Welcome,.. and good luck... ;)... |
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Title: Re: Petcock issue! Help! Post by Arizuno on 05/28/12 at 19:47:20 I no longer have petcock paranoia. I have a Raptor. Which means I no longer experience spontaneous silence at inopportune moments. I suppose that makes my longer rides relatively boring, but that's kinda like a "boring flight", if you get my drift... |
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Title: Re: Petcock issue! Help! Post by Oldfeller on 05/28/12 at 20:30:15 http://upload.wikimedia.org/wikipedia/commons/thumb/6/68/Stradano_Inferno_Canto_08.jpg/220px-Stradano_Inferno_Canto_08.jpg Long Distance call from Oldfeller, currently vacationing in 5th circle of Dante's imagination thanks to the jokers who want to attach "hater" labels to people and then chuckle about it. Hey guys, this River Styx place really really has a bad pollution problem and way too many ugly naked angry people floundering around in it trying to drown each other. Think of it as pig wrestling where the pigs pooped. Pew !!! Eau de toilet fer shure. Robb+, Routy wants you to diligently work on your stock vac petcock and your carburetor until you can manage to fix both of them. If you listen to him, you will eventually get there .... it will be longer and more time consuming and alas somewhat relatively temporary as other problems may well come to see you later on. The amount of work he wants you to put into this very first step of his plan (remove petcock and clean the screen) would also COMPLETELY INSTALL A RAPTOR PETCOCK and then you wouldn't have any petcock step two to deal with after that. So, you can follow along with Routy or go ahead and hop ship and end your vac petcock problems completely with a Raptor. Remember, there are 5 failure modes to a standard vac petcock and Routy iis having you to deal with just one of them now -- the others will come around in due turn even if you do manage to "fix it this time". Routy, please don't be angry --- and don't hate (this is not a spa down here, it sucks really really bad) |
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Title: Re: Petcock issue! Help! Post by Routy on 05/28/12 at 22:36:27 Serow, Did I ever say that your test was to fool anyone,...or that it was not a good test to do before going elsewhere ?? So don't pretend I did ! The only problem is,......not you near as bad as OF,.....have everyone so paranoid of that vac petcock, that even after the test......proving it not to be the problem, they don't trust it, and still go out and spend the $30 raptorizing, only to find it money wasted. He even has them all believin (imagining) that the bike must be running better after raptorizing, just because that horrible dreaded vac PC is no longer attached to the bike in any way shape or form. And OF,.....why would you think (say) I'm mad,...or hate ? I'm only warning the new guys here of the PC paranoia that exists here whether you see it that way or not. If they want to believe you, fine, its their money. And to the new guys to this bike, if the conveinence and saftey factors of the vac PC are worth giving up for knowing that the vac PC will never give you trouble, go and raptorize it, its your money. But when you don't turn the valve off and your gas tank runs into your crankcase, you'll remember what I said ! ::) |
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Title: Re: Petcock issue! Help! Post by Serowbot on 05/28/12 at 23:26:55 OF,.. Styx looks nice, remind's me of Tucson... Expect to see you floating by soon,... room for one more?... I'll be bringing coins and cold beer with fresh limes... :-?... Don't come .... we aren't the ones in the boat. Your legs will get tired from treading water. |
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Title: Re: Petcock issue! Help! Post by Dave on 05/29/12 at 04:54:44 To the Original Poster: What happens if you disconnect the fuel line from the petcock, and then attempt to run fuel into a jug? My good petcock took 7 minutes to flow a gallon of gas in the prime position. (If yours flows at a similar rate - it is not a filter or flow problem. What happens if you put the petcock in the ON or Reserve position and then pull a vacuum on the vacuum line that connects to the intake manifold? If the petcock flows fuel at a steady rate......that may not be the problem? When you pull a vacuum on the petcock - does it bleed off indicating there is a hole in the diapragm? If you put the petcock in prime and then open the drain screw on the carb float bowl - do you get a steady flow of fuel draining out? If so - the petcock should not make the bike hard to start? I belive a faulty petcock could cause the following symptoms: 1) If the diaphragm is stiff - Intermittent flow, low flow, no flow. 2) If the diaphragm is broken - Intermitent flow, low flow, no flow, fuel in vacuum line. 3) If the petcock is dirty - Low flow, no flow. Engine should start and run at low throttle settings, but lose power at higher power use....or if there is enough junk it could cause the flow to be so low that it could start hard and barely run. I am confused by you comments about the bike running better with the vacuum hose unplugged? Have you been running the engine with the vacuum line off and unplugged? |
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Title: Re: Petcock issue! Help! Post by robb+ on 05/29/12 at 18:09:56 Routy, I didn't mean to be a thingy. I just didn't like my testing being chalked up to paranoia. I drained the tank (took about 7-10 minutes, it was almost full) and pulled the petcock. The screens looked clear, but I stilled blew some carb cleaner through it. When I said it ran better with the vac port on the carb open I meant this. I started the bike with the vac port plugged with a like plastic molding, and it slipped off. The idle sounded better and it wasn't sputtering nearly as much so I took it for a ride! The petcock was on the on position and it still turned off when I pulled up to a light. I switched it to prime and it didn't cut off anymore. Still couldn't get it above like 65 down a straight-away. I know the carb could use cleaning but after researching on here I thought the PC would be the easier thing to try and fix first. Serowbot, did you mean the gas cap? I'm not sure how I'm supposed to check it while riding ;) Thanks for all the input guys! |
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Title: Re: Petcock issue! Help! Post by Dave on 05/29/12 at 18:26:14 342924246D460 wrote:
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Title: Re: Petcock issue! Help! Post by verslagen1 on 05/29/12 at 18:42:48 2A373A3A73580 wrote:
This means you're way to rich. could be a dirty air filter or a dead bird. Quote:
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Yes, I didn't know either, only way is to pull over and shut her down, then check. to sum it up, check the air filter. I'd clean the carb, or at least seafoam as a 1st try at it. your PC diaphragm could be hard or there's carp in there. bikes that sit a long time develop nodules of corrosion on aluminum. |
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Title: Re: Petcock issue! Help! Post by Digger on 07/27/12 at 21:44:50 5B544E55494F5C5E56584F3D0 wrote:
Rout, Here's an interesting data point for you: http://suzukisavage.com/cgi-bin/YaBB.pl?num=1152108113/0 You can watch it unfold real time....it happened several years ago. What say you? BTW, when I later Raptorized, I did an autopsy on the OEM petcock and could find no visible evidence of any problems with the diaphragm. However, I DO know that capping off the vacuum line when the problem first arose completely solved my driveability problems...all of them! As far as forgetting to turn off the petcock.....I'm an old school biker (got my first bike back in '70). I've really got no use for them newfangled vacuum operated petcocks. I think they cause more trouble than they prevent. Thoughts? |
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Title: Re: Petcock issue! Help! Post by Serowbot on 07/27/12 at 22:11:06 Wow!... That's way back... I can't believe I ever helped Digger with a problem... ;D... I know I've learned plenty from him... ;)... |
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Title: Re: Petcock issue! Help! Post by Digger on 08/04/12 at 21:59:45 1107100D15000D16620 wrote:
You guys have all helped me more than you'll ever know....the only reason I'm not a lurker here is because I feel a sense of debt....(raised a Catholic, I was). |
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