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Showing results for tags 'fuel filter'.
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Hi, My car was in the garage and I ran it out of fuel starting it to keep the battery charged. This has happened before and is always such a pain in the a** as I usually have to take the whole fuel line apart back to the tank to get the fuel to the carbs. Its like the fuel pump will not pull the fuel once it runs dry (air pocket?) . It does not have the pump by the tank just the one on the engine. In the past I have sucked the fuel into the lines with an extra piece of fuel line and did this to draw it up to the engine. Anybody have an idea why the fuel pump wont draw the fuel from the tank - it now has fuel in it. And / or an easier way to get the fuel to the carbs. HELP!!!
We have been working on rebuilding a 1973 240z which we recently purchased and came across another puzzle that I was hoping someone else had experience with. We recently got the car running and took it for a test drive. After driving about five miles we stopped for anoint half an hour and then took off again. Almost immediately the car would buck and shudder any time we tried to accelerate. For a short time it would idle but then shudder and die under acceleration. We ended up towing it home. My initial thought was that the fuel filter was bad. We added some gas to the tank (just in case) and put some Heet in the tank. We then pulled the fuel filter. It did not look dirty nor could I see a water layer. I cut the old fuel filter open just to be sure and it still appeared clean. While this was off I blew air through the gas line back to the tank to make sure it was not plugged and we could hear the air blowing through easily. We then installed the new fuel filter and then disconnected the fuel line on the carburetor side of the fuel pump. The fuel pump is a mechanical kind and it appears to be a new/newer pump. We turned the car over and lots of fuel came through. I dont have a pressure tester to do a real pressure check. We then reconnected everything and fired it up. It started up and ran pretty well. We then tuned the carburetors and found that they were not balanced hardly at all. We used an air flow meter and got them balanced and the idle set and the car was now sounding and idling much better than it had. So we took another test drive. The initial drive was around the neighborhood, low speeds and gently acceleration. The engine ran smoothly so we took it out to the main road. As soon as we began heavier acceleration the engine shuddered and bucked and promptly died. We let it sit for just a moment and it fired back up but would start to die under heavier load. We were able to drive it home carefully. We then did some checking with the engine running while parked and I could not get it to stumble or load up and die. I noticed that the fuel filter barely had any fuel in it. We shut the car off and the filter slowly filled up with fuel. We restarted the car and the fuel filter again ran to where there was barely any fuel in it but I still could not get the car to die. My guess is that either the fuel pump is not pumping at a high enough pressure which starves the engine under load or that something is plugging the fuel line from the tank, again starving the engine for fuel under load. I rechecked the new fuel filter and it is still clean. There is not sludge or grit in it at all. Any ideas would be appreciated.
I have a '73 240z, stock. I finally got it to spark (see http://www.classiczcars.com/forums/showthread.php?t=41386), and now I'm trying to get fuel to it. After a month of trying to get it to spark, I may have run all of the fuel through it. I put 5 gallons in the tank and cranked the engine for a good 2 minutes with no success. The fuel filter is dry. I looked in my Haynes and Chilton manuals. Each suggest that the '73 didn't have an electrical pump - only the mechanical pump up front. I crawled under and couldn't find an electrical pump, either. At least not an external one. I took a couple of pictures of what I did see, and I'm a little confused. There are two wires coming out of a module on the tank. I assume these are the fuel-level indicator wires. There are 2 more wires in the bundle that look like they've never been hooked up. (see pictures). Either way, I'm not getting gas to my motor. There hasn't ever been ANY debris in the fuel filter - I don't think its a clogged line. Assuming my fuel lines are dry and I only have the mechanical pump, do I have to prime it somehow? Thanks for the help - I'm really a noob when it comes to this, but I'm really enjoying the education. (My wife is trying to talk me into selling it, she doesn't really believe that I enjoy working on it. Would be an easier sell if it was ACTUALLY RUNNING:angry:).