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I had originally posted my problem here with a complete description:
http://www.ffcars.com/ubb/ultimatebb.php?ubb=get_topic;f=1;t=007376#000016
Basically the engine sputters under acceleration and idles for a while, but will eventually die. Under acceleration you can see black smoke puff out of both sides when it sputters. I have changed out everything in the ignition and checked for intake leaks or cracked hoses. I think that my problem is in the fuel system. Here are the results of my fuel pressure test.
After turning on the key the pressure spikes to just above 40 psi and levels out at 38 psi. I can hear the regulator open as the pressure goes to 38 psi. The needle is rock solid at 38 psi so I assume that it is not a stuck or leaking injector. When the engine is running at idle the pressure drops to 34 psi. As the idle gets rougher and the engine starts to die I can see the fuel pressure drop a little. If I pull the vacuum line off the regulator the pressure increases to 44 psi. I think the Chilton's book called for 39 psi. Could this be a fuel pump problem or a regulator problem? I'm going to replace the filter and the check the pressure again. I still need to run a compression test, but every time I think about it the engine is still hot.
Sorry for the long post, but I want to give as much information to get the best advice.
Donny
http://www.ffcars.com/ubb/ultimatebb.php?ubb=get_topic;f=1;t=007376#000016
Basically the engine sputters under acceleration and idles for a while, but will eventually die. Under acceleration you can see black smoke puff out of both sides when it sputters. I have changed out everything in the ignition and checked for intake leaks or cracked hoses. I think that my problem is in the fuel system. Here are the results of my fuel pressure test.
After turning on the key the pressure spikes to just above 40 psi and levels out at 38 psi. I can hear the regulator open as the pressure goes to 38 psi. The needle is rock solid at 38 psi so I assume that it is not a stuck or leaking injector. When the engine is running at idle the pressure drops to 34 psi. As the idle gets rougher and the engine starts to die I can see the fuel pressure drop a little. If I pull the vacuum line off the regulator the pressure increases to 44 psi. I think the Chilton's book called for 39 psi. Could this be a fuel pump problem or a regulator problem? I'm going to replace the filter and the check the pressure again. I still need to run a compression test, but every time I think about it the engine is still hot.
Sorry for the long post, but I want to give as much information to get the best advice.
Donny