ejje Posted April 19, 2014 Report Share Posted April 19, 2014 I Think the filter in the fueltank are full of mud. How can I Clean? Can I use compressed air? Link to comment Share on other sites More sharing options...
cdgrinci Posted April 19, 2014 Report Share Posted April 19, 2014 I think it might just be time to pull the tank (and clean it as well as filter maintenance); I guess it depends on how bad it is, but "full of mud" gives me recourse to think a major cleaning is in order. Chuck '25 CT5, '04 Bravada........but still lusting for that '69 Z-28 Link to comment Share on other sites More sharing options...
Cadillac Jim Posted April 19, 2014 Report Share Posted April 19, 2014 I would start with parts cleaner and soaking overnight. Carburetor cleaners tend to destroy plastics. Gasoline can be a fire hazard that seeks out a hot water heater next door if you leave it open too long. -- Click Here for CaddyInfo page on "How To" Read Your OBD Codes-- Click Here for my personal page to download my OBD code list as an Excel file, plus other Cadillac data -- See my CaddyInfo car blogs: 2011 CTS-V, 1997 ETC Yes, I was Jims_97_ETC before I changed cars. Link to comment Share on other sites More sharing options...
ejje Posted April 20, 2014 Author Report Share Posted April 20, 2014 I have cleaned and now I´m waiting for new parts from US for the fuelpump. You can not take away the filter from the tank. There is no plastic. Only real steel. Link to comment Share on other sites More sharing options...
Cadillac Jim Posted April 20, 2014 Report Share Posted April 20, 2014 I would use a toothbrush with carburetor cleaner. A auto parts store will have something better than a toothbrush, particularly if the filter is recessed or otherwise hard to reach with a toothbrush. And, I've seen some toothbrushes dissolve in carburetor cleaner. -- Click Here for CaddyInfo page on "How To" Read Your OBD Codes-- Click Here for my personal page to download my OBD code list as an Excel file, plus other Cadillac data -- See my CaddyInfo car blogs: 2011 CTS-V, 1997 ETC Yes, I was Jims_97_ETC before I changed cars. Link to comment Share on other sites More sharing options...
ejje Posted April 21, 2014 Author Report Share Posted April 21, 2014 I would use a toothbrush with carburetor cleaner. A auto parts store will have something better than a toothbrush, particularly if the filter is recessed or otherwise hard to reach with a toothbrush. And, I've seen some toothbrushes dissolve in carburetor cleaner. Hi Jim, Now I was curious, where do I use the toothbrush? The filter in the tank can not be accessed. Assembled before the assembly of the tank. As before, I have cleaned the tank and blow the filter clean with compressed air. Thanks for your good efforts to help. Link to comment Share on other sites More sharing options...
Cadillac Jim Posted April 21, 2014 Report Share Posted April 21, 2014 You can get small brushes like bottle cleaners or even pipe cleaners for use in cleaning carburetors. If you are satisfied with the filter now, leave it alone. If you are not, you can try compressed air or look at the carburetor brushes at a parts shop. Here's an example: -- Click Here for CaddyInfo page on "How To" Read Your OBD Codes-- Click Here for my personal page to download my OBD code list as an Excel file, plus other Cadillac data -- See my CaddyInfo car blogs: 2011 CTS-V, 1997 ETC Yes, I was Jims_97_ETC before I changed cars. Link to comment Share on other sites More sharing options...
winterset Posted April 21, 2014 Report Share Posted April 21, 2014 If you are indeed seeing mud, its more likely to be rust deposits from...... The inside of the tank walls Those old steel tanks are tricky. You might be safer taking the tank to be cleaned and treated (if funds allow) otherwise you might end up with constant fuel flow problems, and/or a leaky tank. Link to comment Share on other sites More sharing options...
ejje Posted May 17, 2014 Author Report Share Posted May 17, 2014 Now I can tell what´s in the tank. First, there is no filter so nothing to clean. The tank inside all new, no rust, no mud. Fuel pipe is attached to the bottom of the tank.In the end of the tube is a small washer with two small holes. Maby you can call the washer a filter. Now I took away the washer so now the pipe is open. If the car don´t go now I do not know what to do. When I bypass the tank and take gasoline from a can car runs perfectly. Link to comment Share on other sites More sharing options...
winterset Posted May 17, 2014 Report Share Posted May 17, 2014 Possibly one of the rubber hoses under the car has a slit, and its sucking in air. If there is somehow a way to blow air into the front and have someone listen for air escaping from a hose. Link to comment Share on other sites More sharing options...
ejje Posted May 18, 2014 Author Report Share Posted May 18, 2014 Started up after cleaning and control. The engine stopped after one hour. The pump stopped give petrol. After 2 min ok. No damage at the hoses, all new. I wonder if it might be the pump rod? I'll check. Link to comment Share on other sites More sharing options...
Cadillac Jim Posted May 19, 2014 Report Share Posted May 19, 2014 Was there a vacuum in the tank when you took off the fuel cap? A stopped up vent in the filler neck or gas cap can cause the engine to die after some time of driving. -- Click Here for CaddyInfo page on "How To" Read Your OBD Codes-- Click Here for my personal page to download my OBD code list as an Excel file, plus other Cadillac data -- See my CaddyInfo car blogs: 2011 CTS-V, 1997 ETC Yes, I was Jims_97_ETC before I changed cars. Link to comment Share on other sites More sharing options...
ejje Posted May 19, 2014 Author Report Share Posted May 19, 2014 Vent in the filler neck and gas cap are open.I have driven without cap. As I said , hoses new, pipe open. It must be the pump. I take the rod and pump away today and check it again. Link to comment Share on other sites More sharing options...
Cadillac Jim Posted May 20, 2014 Report Share Posted May 20, 2014 Have you checked the fuel pressure? I believe that it is supposed to be at least 4.5 psi (31 kPa). -- Click Here for CaddyInfo page on "How To" Read Your OBD Codes-- Click Here for my personal page to download my OBD code list as an Excel file, plus other Cadillac data -- See my CaddyInfo car blogs: 2011 CTS-V, 1997 ETC Yes, I was Jims_97_ETC before I changed cars. Link to comment Share on other sites More sharing options...
ejje Posted May 20, 2014 Author Report Share Posted May 20, 2014 Now i did a new check. Mont a transparent hoses after the pump. After about 30 min it started with air bubbles. After 60 min no petrol. I think it´s the diafragma. It´s new but it was very thin and soft .I believe that the membrane becomes too soft when the pump gets hot. Cheap quality.China crap. I have ordered a new original pump. Will install on Friday. Link to comment Share on other sites More sharing options...
Cadillac Jim Posted May 21, 2014 Report Share Posted May 21, 2014 If it's the fuel pump diaphragm, check for gas in the oil. -- Click Here for CaddyInfo page on "How To" Read Your OBD Codes-- Click Here for my personal page to download my OBD code list as an Excel file, plus other Cadillac data -- See my CaddyInfo car blogs: 2011 CTS-V, 1997 ETC Yes, I was Jims_97_ETC before I changed cars. Link to comment Share on other sites More sharing options...
ejje Posted May 22, 2014 Author Report Share Posted May 22, 2014 I took apart the pump again and checked the membran, I found 3 small hole. I put back the very,very old original membrane and the car run over two hour then vapor lock started, I switch to the electric pump for short and then the pump startet go again. Now I will try mont a return pipe from pump to tank. But I do not know exact how to do that. I have to find right filter and then see where I can install. Maby some one have good advice? Link to comment Share on other sites More sharing options...
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