Lacyjs9 Posted May 4, 2013 Share Posted May 4, 2013 when i take off my gas cap there is no pressure behind it Link to comment Share on other sites More sharing options...
NorthWet Posted May 4, 2013 Share Posted May 4, 2013 Is there a particular reason why this causes you concern? Link to comment Share on other sites More sharing options...
Lacyjs9 Posted May 4, 2013 Author Share Posted May 4, 2013 isnt there supposed to be? im getting crap for gas mileage it idles fine in park then in drive it fluctuates drive to a stop light it idles fine then go to another it fluctuates again 87 4wd wagon 2 barrel Link to comment Share on other sites More sharing options...
Lacyjs9 Posted May 4, 2013 Author Share Posted May 4, 2013 and if i dont let it run for 5 minutes or so it loses power when i start driving Link to comment Share on other sites More sharing options...
NorthWet Posted May 4, 2013 Share Posted May 4, 2013 The fuel tank is vented into the charcoal canister, so no tank pressure should build up. Sometimes, with an almost empty tank, you can get a slight vacuum in the tank. My first impression from your description is a clogged fuel filter. This usually presents as idling ok, but loss of power when demanding more from the engine. (High speed, accelerating.) You did not mention any smoke issues, or smell of fuel from the exhaust or sooty tailpipe/bumper area, so I am guessing that the engine isn't dying from a stuck choke or other too-rich condition. Link to comment Share on other sites More sharing options...
Lacyjs9 Posted May 4, 2013 Author Share Posted May 4, 2013 nah no smoke or anything ive changed the fuel filters but not the charcoal canister is there away to determine if that is defective a do smell gas coming from under the hood but not from the canister more around the carb area. there looks to be a silver filter on my lines under the car around the fuel pump was is that i can get a pic if needed Link to comment Share on other sites More sharing options...
NorthWet Posted May 4, 2013 Share Posted May 4, 2013 Charcoal canister should be a non-issue. It is the big black plastic object with 3 or 4 small hoses running to it in the engine compartment near the radiator electric fan. Where was/were the fuel filter(s) that you replaced? IIRC, the object near the driver's strut tower is just a vapor separator. (All of my EA82s are FI, so are a little different.) Have you looked at your sparkplugs to see if they are sooty or gray or white? If not yet, it is useful to know whether things are too rich or too lean. Link to comment Share on other sites More sharing options...
Lacyjs9 Posted May 4, 2013 Author Share Posted May 4, 2013 the fuel filters i replaced one is in the rear and one is in the front attached to carb i will check the plugs out also it dies if i take the top of to the air box Link to comment Share on other sites More sharing options...
NorthWet Posted May 4, 2013 Share Posted May 4, 2013 You need some people with better carb experience to join in. Link to comment Share on other sites More sharing options...
mikaleda Posted May 4, 2013 Share Posted May 4, 2013 This sounds like a vaccume leak somewhere to me, it could be in the evap system. Do you smell gas in the car? Link to comment Share on other sites More sharing options...
Lacyjs9 Posted May 4, 2013 Author Share Posted May 4, 2013 some times yes Link to comment Share on other sites More sharing options...
NorthWet Posted May 4, 2013 Share Posted May 4, 2013 A thought to check: Are the screws holding the top section of the carb to the body of the carb loose? (Not a totally random thought. The airbox cover removal prompted this Q.) Link to comment Share on other sites More sharing options...
mikaleda Posted May 4, 2013 Share Posted May 4, 2013 (edited) some times yes There is a plastic tank in the rear passenger wheel well that could be cracked, this might cause a vaccume leak and would explain your symptoms. Edited May 4, 2013 by mikaleda Link to comment Share on other sites More sharing options...
ferox Posted May 4, 2013 Share Posted May 4, 2013 The diaphragm in the valve on the charcoal canister does go bad over time, which will cause a pesky vacuum leak that is often overlooked. When was the last time your carb was rebuilt? Link to comment Share on other sites More sharing options...
Lacyjs9 Posted May 4, 2013 Author Share Posted May 4, 2013 The diaphragm in the valve on the charcoal canister does go bad over time, which will cause a pesky vacuum leak that is often overlooked. When was the last time your carb was rebuilt? im pretty sure its the same one i just bought it its an hittachi Link to comment Share on other sites More sharing options...
Lacyjs9 Posted May 4, 2013 Author Share Posted May 4, 2013 whats this Link to comment Share on other sites More sharing options...
TallonX Posted May 4, 2013 Share Posted May 4, 2013 That is a fuel pulse diaphragm, compensates for the pulses from the fuel pump. Link to comment Share on other sites More sharing options...
TallonX Posted May 4, 2013 Share Posted May 4, 2013 That is a fuel pulse diaphragm, compensates for the pulses from the fuel pump. Link to comment Share on other sites More sharing options...
Lacyjs9 Posted May 4, 2013 Author Share Posted May 4, 2013 im gonna replace all the vacuum hoses and will make a new topic if it continues also that charcoal canister is like 160 bucks at parts geek Link to comment Share on other sites More sharing options...
mikaleda Posted May 4, 2013 Share Posted May 4, 2013 I've got a charcoal canister if you want it p.m. Me and I'll send it to you for the price of shipping. Link to comment Share on other sites More sharing options...
ferox Posted May 4, 2013 Share Posted May 4, 2013 im gonna replace all the vacuum hoses and will make a new topic if it continues also that charcoal canister is like 160 bucks at parts geek I replaced mine with one from a '91 Jeep Grand Wagoneer. They're $30 at Rockauto. If you search around you can probably find others that are closer in size to the subie canister for $30-$50. Link to comment Share on other sites More sharing options...
ferox Posted May 4, 2013 Share Posted May 4, 2013 im pretty sure its the same one i just bought it its an hittachi Not quite sure what you mean by this. Do you mean it's the original carb and you just bought the car? Or do you mean you just bought another carb? My question was about when the carb was rebuilt last. If it's hasn't been rebuilt to your knowledge, then that might be in order. Link to comment Share on other sites More sharing options...
Lacyjs9 Posted May 4, 2013 Author Share Posted May 4, 2013 Not quite sure what you mean by this. Do you mean it's the original carb and you just bought the car? Or do you mean you just bought another carb? My question was about when the carb was rebuilt last. If it's hasn't been rebuilt to your knowledge, then that might be in order. yeah i just bought the car it was kept up though only 113k on it when i got but i dont know what has been done to it i bought it from an older couple they bought it auction just to drive a couple of times it set for 3 years while they had it Link to comment Share on other sites More sharing options...
ferox Posted May 5, 2013 Share Posted May 5, 2013 yeah i just bought the car it was kept up though only 113k on it when i got but i dont know what has been done to it i bought it from an older couple they bought it auction just to drive a couple of times it set for 3 years while they had it The gaskets are probably dry-rotted and a lot of the fasteners could be loose. The float is probably out of spec too. I would recommend a carb rebuild. The kits are ~$30 and a rebuild isn't really that hard to do if you follow the directions step-by-step. If you are ok spending some money, a Weber swap is a good investment, especially if your car only has 113k. 1 Link to comment Share on other sites More sharing options...
Lacyjs9 Posted May 6, 2013 Author Share Posted May 6, 2013 The gaskets are probably dry-rotted and a lot of the fasteners could be loose. The float is probably out of spec too. I would recommend a carb rebuild. The kits are ~$30 and a rebuild isn't really that hard to do if you follow the directions step-by-step. If you are ok spending some money, a Weber swap is a good investment, especially if your car only has 113k. all the webers i found wont fit if equipped with power steering Link to comment Share on other sites More sharing options...
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