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No fuel through pump.. Cam? https://slantsix.org/forum/viewtopic.php?t=49535 |
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Author: | Groovin65 [ Sat Aug 11, 2012 10:56 am ] |
Post subject: | No fuel through pump.. Cam? |
Quick background: 225 was recently rebuilt by myself. Machined the block .40 over, new cam, balanced crank 20/20, new internals minus rods (had them balanced) and push rods. Fuel pump is new, sending unit is new as well as filters. Had a few small carb issues and gas coming back out of the filler when trying to fill up. Got them worked out minus the gas issue. Yesterday while driving she ran out of gas. Went and got 2 gallons and cranked. Nothin. I cranked for a while but she didnt even try. Pulled the line off the fuel filter-DRY Pulled line off fuel pump DRY (both ends) This morning I pulled gas to the pump via mouth and connected and cranked. Nothin. Still bone dry on the exit side. Pump is new but pulled it off and pushed it up and let go- Stream of gas out the exit. Is my cam worn out already?! It hasnt made it to the 500 mile marker for oil change. However pre initial startup I had some carb issues and she was cranked quite a bit. Had lube on cam but maybe pre mature failure? One last thing was my gas cap seal is shot, she's driven fine up till now but thought id throw that out there just in case its causing a vent issue? Any ideas would be appreciated. ![]() |
Author: | Mroldfart2u [ Sat Aug 11, 2012 11:16 am ] |
Post subject: | |
Doubt its a cam problem, altho i am not for sure on a slant how its driven. (ie a bolt on eccentric, cam lobe, etc.) BUT I would still suspect the fuel pump. In your 'test' you could be moving the lever farther than it is actually moving when mounted, making one believe all is well with it. I was going to suggest that maybe not enough fuel to be picked up but you did manage to cancel that out with the suction test. |
Author: | DadTruck [ Sat Aug 11, 2012 11:25 am ] |
Post subject: | |
if you have the fuel pump off, with a mirror you maybe able to get a peek at the fuel pump lobe. With a magnetic base and an indicator, you should be able to measure the eccentric. if it is the fuel pump lobe, you can always go to an electric pump, but I would wonder about the lifter lobes, they are under a lot more stress than the fuel pump lobe. |
Author: | DusterIdiot [ Sat Aug 11, 2012 9:45 pm ] |
Post subject: | What cam?!?!?! |
What cam did you use, if a regrind, this can be suspect as many cores are 'worn out' in this way...If new, that's not good news. -D.Idiot |
Author: | walpolla [ Sat Aug 11, 2012 11:24 pm ] |
Post subject: | |
I have seen the odd occasion where the pump actuator arm has been positioned UNDER the cam lobe and bolted up. Obviously will not work like that. Must be on top. regards,Rod ![]() |
Author: | emsvitil [ Sat Aug 11, 2012 11:53 pm ] |
Post subject: | |
Can you blow air back into the tank through the fuel line? The fuel tank sock could be gunked up..... |
Author: | Al T [ Sun Aug 12, 2012 8:52 am ] |
Post subject: | Run the test Aggressive Ted suggested |
did you try this? |
Author: | Groovin65 [ Mon Aug 13, 2012 10:59 am ] |
Post subject: | |
Thanks for the responses everyone. This morning I went out and blew some air back in the tank, re-secured the pump and pulled fuel to the pump and cranked for a minute. She started! Also noticed while scratchin' my head was a gold-ish color goop on all over the pcv cap.. Head gasket? Plugs look nice, and i don't see any oil in the radiator. My oil level is a bit higher than I filled it to.. Leakin? ![]() Love these ole cars. ![]() |
Author: | Doc [ Mon Aug 13, 2012 11:04 am ] |
Post subject: | |
Pull the oil, pan drain plug and see if any water comes out. (the oil floats) DD |
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