Acceleration problem

Techman 1,
Concerning the acceleration problem, I had already removed the belt and attempted the test, sitting still the accelerator would go to the floor but the carburation would still bog down, act like it was choking out, so I replaced the belt, dropped and drained the fuel tank, pulled and tested the fuel pump, tested out to book spec's, since it was relatively new (last year, 9 months ago), I didn't expect any different. After reinstalling the tank, instead of putting the screen filtered fuel in my tank again I put it in my sons 96 s-10 chevy blazer, his car started to bog down on him on his way to work that evening. I of course filled my tank with new fuel, and in two days driving now the problem is going away steadily, each time I drive the van now it's horse power and acceleration improve. My thought is I got some bad gasoline on the last fill up since the same fuel affected my sons vehicle as well?,,,As a side note we did the same to his vehicle this morning, that tank was a monster to remove unlike the one in my van, and he just called me from work to inform me that his vehicle is running much better now as well. So trial and error may have proved the fix?

[quote:f1a8ac1ed8="techman1"]Just a couple of comments and I hope they help you further. Today's fuel filters have such a fine mesh that they will not pass water molecules. Any water build up in the fuel filter will eventually cause a restriction of flow and reduced pressure. Also, I like to run fuel system cleaner through the gas tank about once a year, but it dissolves all the crude off the sides of the tank and runs it into the filter. I replace my fuel filter at least every 2 years and I use a bottle of Heet in the winter a couple of times, because is has alcohol and alcohol molecules will pick up water molecules and carry them through the fine mesh of the filter. When I replace a fuel filter (in the frame underneath behind the drivers seat) I like to drain it into a jar to see what was in it. Water will make the gas look milky just slightly. It should be crystal clear besides the slight amber color of gas. Please stop using the Carb word. It is a Throttle Body Injection with dual injectors. 1985 was the last year for a carburetor. Your Throttle body had an IAC motor driven valve. That is an Intake Air Control valve. It is a big steel body nut about one and a quarter inch that threads into the side of the throttle body and has a 4 wire plug on the end. You can unplug it and unthread it and clean the area around where the tip seats with carb cleaner spray and acid brushes or Q-tips. By the way, when you jump the 2 pins under the dash to read engine codes with the check engine light, this also runs the IAC valve fully closed.

Good Luck[/quote:f1a8ac1ed8]

Techman 1,
I do appreciate the information, and considering the issues that just occured with the fuel system, the "TBI" (note no use of the word carburatoir) acceleration issue. I too have the fuel filters (I had installed an additional inline filter as well) changed once each year along with the major service schedule, but had just been reminded about the fuel system cleaner I put in just about the sametime as the replacement of the power belt, and had not thought of the issues that might cause cleaning the gunk off the inside of the fuel cell as well, that may have been the cause of the issue to begin with and when I'd pulled the tank to check the fuel pump and replaced the filter as a matter of course in the process does explain why the system improved shortly afterwards, live and learn. Thank you again for the help.
Bill