hatchsub Posted July 31, 2007 Share Posted July 31, 2007 Ive been living with this problem all summer now and its getting tiring. My weber seems to hessitate and start sputtering at around 2000 rpms but once im past that its fine. And coming off idle it doesnt have noticable hessitation. But since its at that rpm everytime im in gear and take my foot off the gas and put it back on the car bucks back and forth till i give it more gas then it gets past that hessitation and stops. Its very frustrating. I wish i hadnt spent the money on this stupid carburator. My question is what could be the problem? There was some fuel seepage from the base gasket so it got tightened down and i check every once in awhile after and its always dry now. Also i tried carb cleaner and it didnt make a difference in idle when i sprayed it on the base. I am also still using the EGR valve but i disconnected that and it didnt seem to make a difference in the problem either. The timing is set around 9 degrees and the ive played with the idle mixture a few times and it doesnt seem to get rid of this problem. I just started to notice a slight exhaust leak in front of my first cat. I have two cats back to back on the exhaust so there is another possible problem but i dont think so. Im beginning to wonder if this carburator is jetted properly. It came in the kit so it should have been jetted right. Link to comment Share on other sites More sharing options...
Reveeen Posted July 31, 2007 Share Posted July 31, 2007 I've played with the idle mixture a few times and it doesn't seem to get rid of this problem Do you have idle control when you "play" with the idle control screw? (slow down, speed up, slow down: lean, normal, rich) Is the vacuum advance in the distributor working? or hooked to the right spot? With the car not running, and the air cleaner off, looking down the throat of the carb, do you get a shot of fuel when you manually open the throttle? Link to comment Share on other sites More sharing options...
hatchsub Posted August 1, 2007 Author Share Posted August 1, 2007 Is there an easy way to tell if im getting a shot of fuel? I looked down the carb and at idle and off idle i dont see much fuel coming through..if any but i kno there must be some. Once i get past the hessitation problem i see a good stream of it. Im pretty sure this is my problem. But i dont understand. This is a new carb. Not a rebuilt or anything but brand new. Link to comment Share on other sites More sharing options...
hatchsub Posted August 15, 2007 Author Share Posted August 15, 2007 I just had another thought as to the solution to the problem. When i installed the weber i switched the fuel line fitting from the hitachi (the one with the fuel line as well as a fuel return) to the weber. Im wondering could that return line be causing the problem since the weber did not have one to begin with? Could it be that the carb is getting too little pressure cause the pressure that it is getting is being "bled" off to the fuel return? Link to comment Share on other sites More sharing options...
hatchsub Posted August 16, 2007 Author Share Posted August 16, 2007 no ones got an opinion on this? Link to comment Share on other sites More sharing options...
Loyale 2.7 Turbo Posted August 16, 2007 Share Posted August 16, 2007 Yes, I have an Opinion. Since I have a Weber pretty well installed in my White Wagon (visit this Thread for more Details, Ideas... etc: http://www.ultimatesubaru.org/forum/showthread.php?t=53143 ) I can imagine what is Happenin` to your Weber, but maybe I`ll need more feedback to help you. I did installed a Brand new Weber too... Without the Gas Return line, I don`t have any issues with Low Rpm`s, so I guess that Might be that Return line the wrong setup, that is affecting your carb`s performance. I suggest you to Try puttin` back to the Carb`s its original fuel line fitting, forget about the Return (Just cap close it) and Drive it Again. Please, post here the Results. Weberized EA Engines have Better Low End Power / Torque, so I think there will be a Setup Problem. Good Luck! Link to comment Share on other sites More sharing options...
hatchsub Posted August 16, 2007 Author Share Posted August 16, 2007 Well the return line was not my problem. I tried it without it and it still sputtered and ran rough off of idle. I think my carburator is just not built correctly. Im thinking either the accelerator pump or the jets. Link to comment Share on other sites More sharing options...
Loyale 2.7 Turbo Posted August 17, 2007 Share Posted August 17, 2007 Have you Checked for a Vacuum Leaks? Link to comment Share on other sites More sharing options...
hatchsub Posted August 17, 2007 Author Share Posted August 17, 2007 Yea that was the first thing that i checked for. I didnt find any and the car runs great except for that weak spot at light throttle. It doesnt hessitate off of idle like a vacuum leak would cause. It hessitates up higher around 2000rpms. Link to comment Share on other sites More sharing options...
Loyale 2.7 Turbo Posted August 17, 2007 Share Posted August 17, 2007 Also, it might be due to Dirt on the Carb... I think you used a new Fuel Filter, but if not, maybe the Gas tank was low and some dirt may went inside the carb. You can Try with Spray Carb. Cleaner... I hope it can Help. Good Luck! Link to comment Share on other sites More sharing options...
hatchsub Posted August 20, 2007 Author Share Posted August 20, 2007 Thanks Loyale. It doesnt run so bad that i dont drive it..on the contrary it runs better than most cars ive owned but just not as smooth as i would like..yet. I will try cleaning the carb again. Link to comment Share on other sites More sharing options...
Tom63050 Posted August 20, 2007 Share Posted August 20, 2007 Ive been living with this problem all summer now and its getting tiring. My weber seems to hessitate and start sputtering at around 2000 rpms but once im past that its fine. And coming off idle it doesnt have noticable hessitation. But since its at that rpm everytime im in gear and take my foot off the gas and put it back on the car bucks back and forth till i give it more gas then it gets past that hessitation and stops. http://www.theautoist.com/weber_carb.htm This specifically addresses hesitation of Weber carbs and how to fix it. Good luck. Link to comment Share on other sites More sharing options...
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