I am currenty having a problem that might be the fuel pump, but I am not for sure. It seems as if I am not getting much fuel at take off, but if I give it more gas it opens up. It gets worse after driving for a while. I have changed the filter and cleaned the injectors so far. Are there any specific signs to look for to determine a bad pump? The baffling? Is there a certain amount of voltage that has to be going to the pump? The pump has never been changed. 89/350fi/AT/118,000. Thank you for your support. GOT ROCKS?