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craigbassett44 01-19-2009, 02:32 AM a few days ago i changed out my fuel filter. now my truck cuts out horribly at high rpms or around 40 mph. i put a new one in yesterday and it fixed the problem for a few hours then it started to cut out again. the problems intermittent. so changed the cap rotor wires and coil (teacher said that could be it) and still no luck. any kind of help to point me in the right direction would be great. trkklr77 01-19-2009, 04:57 AM shitty half dead stock fuel pump, clogged at the carbs filter. now probabaly out of firing order too. craigbassett44 01-19-2009, 05:08 AM actually there all still in the right firing order but thanks. there also no carb filter. put one inline instead. good try. next The_Undecided 01-19-2009, 09:06 AM shitty half dead stock fuel pump, X2 HAPPYJOHN 01-19-2009, 07:34 PM shitty half dead stock fuel pump, x2 x3, or debris in carb. or bad fuel cap, creating vacuum in tank. ( chased that for a while on my 78 1 ton ) trkklr77 01-19-2009, 08:14 PM yes congradulations, by removing your carb filter you have skipped ahead to full carb tear down to pick all the garbage out of the carb ports. GMCTruxrule 01-19-2009, 10:32 PM And as we say in the Navy, Bravo Zulu on a job well done.:shaking: trevmountain 01-20-2009, 05:45 PM Had this problem twice, once with a 350 and in my 454. I actually had a little bit of a kinked fuel line right at the carb inlet. I know this should be obvious but I didn't notice it right away. I just cut out the kinked section and replace with hose and clamps. Just something to look at. craigbassett44 01-21-2009, 02:45 AM i pulled off the line going into the carb tonight an ran it into a plastic cup. the gas i got out had alil water in it so thats my next try. the 10 second it was pumpin filed up an old cup to i think ive got good pressure trkklr77 01-21-2009, 04:24 PM how the fawk did you get water in the line from removing a filter? cj8scrambld 01-21-2009, 04:45 PM how the fawk did you get water in the line from removing a filter? He didn't say how long it took him to change the filter......it may have been months/years...just that he finished it days ago....:D My guess....lots O'water in the fuel tank? I'd consider dropping the tank and drain it out. void_of_light 01-22-2009, 01:53 PM My 77 would clog a fuel filter in a matter of minutes due to rust in the tank. I am going to poly tanks when I finish rebuilding it. Might be that | |