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I'm all ready to race this saturday and sunday but......
#1
i'm all good to go with the trailer and fuel system, alternator, DL safety loop and etc now but............ the engine is getting hard to start and the motor dies by itself after a minute or so of idling. and when i try to restart it, i could crank it for a little while and i have to floor the gas pedal to restart it. i checked my timing and carb tuning so that shouldn't be te issue.

the only old'ish part on the motor now would be the coil which is a pertronix and the spark plug wires which is ford racing. i'm relucant to purchase expensive wires because my new motor will have wires that come with them along with a new coil.

i need a few ideas on what could be going on. i do believe however the camshaft or valves should be out of the equation because i am not getting any popping or backfiring.
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#2
you may have checked already but as i was reading the first thing that popped into my mind was trash in filter or carb

[Image: 2zdx09d.png]
Yea,Tho i cruise through the valley of the shadow of rice,I will fear no Turbo,For Torque art with me.Thy rods and crankshaft,they comfort me. Big Grin Robert
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#3
thundertc64;61966 Wrote:you may have checked already but as i was reading the first thing that popped into my mind was trash in filter or carb

i replaced all the way from the tank to the carb. i have a 85 micron filter before the tank and a 40 micron filter before the regulator.

i will tank off the carb bowls tomorrow and see if i find something. i guess i should also recheck my spark plug gap because i did widen the gaps to .060 because of the MSD.

i hope i could find something wrong here shortly or no reason this whole weekend.
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#4
May have sucked trash from the new tank. I would change filters first as ist should be the easiest. Then make sure its getting fuel, maybe the microns are to small and restricting the gas flow. When I had 2 filters on mine I would have a similar issue with mine.
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#5
Tnfastbk;61992 Wrote:May have sucked trash from the new tank. I would change filters first as ist should be the easiest. Then make sure its getting fuel, maybe the microns are to small and restricting the gas flow. When I had 2 filters on mine I would have a similar issue with mine.

speaking of fuel flow, before i set the fuel regulator at 7.5psi and then when the problem started i saw that the fuel pressure gauge was reading 5.5 (its a new mr. gasket). so i bumped it back up to 7.5 psi and it still wants to do that.

i think the problem could be if it is fuel flow is that i'm using a big 85 micron filter right out of the tank, into a 1.5 ft of -10 suction line then into the filter, then into the pump. maybe that filter is too restrictive being on the suction line? (also i have a female to female double coupler being the connection to filter and pump)

the other filter is a filter that only summit racing makes (i believe earl makes their fuel fittings and hoses) its a 90 degree filter. thats mounted right at the bulk head pointed verticle. and thats a 40 micron.

should i try taking off the =10 filter before the tank and plugging in the fitting straight into the pump?

is your thoughts here because i have to floor it to get the motor to start sometimes?/
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#6
I have two thoughts on it 1 is that it might be starving for fuel and the extra pump to the floor is throwing enough in to fire 2 is possible overloading and the flooring of the pedal is allowing extra air in to dry the excess fuel out but you did not mention any overload and that you checked the carb tuning so i would try taking off the =10 filter before the tank and plugging in the fitting straight into the pump

[Image: 2zdx09d.png]
Yea,Tho i cruise through the valley of the shadow of rice,I will fear no Turbo,For Torque art with me.Thy rods and crankshaft,they comfort me. Big Grin Robert
  Reply
#7
thundertc64;62056 Wrote:I have two thoughts on it 1 is that it might be starving for fuel and the extra pump to the floor is throwing enough in to fire 2 is possible overloading and the flooring of the pedal is allowing extra air in to dry the excess fuel out but you did not mention any overload and that you checked the carb tuning so i would try taking off the =10 filter before the tank and plugging in the fitting straight into the pump

i had to reset the floats and they are now set where they need to be. sucky thing is that i got about 7ish galloons of gas in the tank now and only have room for about 5.5 gallons to go into containers. maybe i could quickly take off the filter and the coupler and then quickly snap on the fitting again.
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#8
maybe i could quickly take off the filter and the coupler and then quickly snap on the fitting again. Maybe jack one side of car up and let fuel run to one side and you should not have to much spill out

[Image: 2zdx09d.png]
Yea,Tho i cruise through the valley of the shadow of rice,I will fear no Turbo,For Torque art with me.Thy rods and crankshaft,they comfort me. Big Grin Robert
  Reply
#9
AmenAmendevildevildevildevildevilwell well well, lets mark this one off for being another simple fix problem that scares you to death.............

when i removed the entire fuel system, i installed a one wire alternator and wanted to make sure its charging. so i poured about 12 ouches of gas into the barrels so it'll run and enough to where i could get a charging volt reading. well when it was running the carb was making a HUGE sucking sound. but when i finished installing everything on monday the sucking sound was gone and came and went.

i called up the carb builder here locally and he said if i'm still feeding 7.5 psi to the carb then i shouldn't of had to readjust floats but i did. so he told me also that i could of sucked in all kinds of debris from new tank and lines/filters. so i took off both the bowls and cleaned everything with carb cleaner and when i went to install the bowl back, on....................................................................................................the primary jets were so loose that they were on the verge of falling off. i was like devildevildevildevil. so i tightened them up. on the backside it gave me an oppurtunity to rejet the rears. the carb builder flowed the carb and it flowed best with a 91 jet. with the 91 jet it was a tad rich so he told me to back off the jetting 1-2 numbers. i was at 89 so i'm i'm going to try the 90 jets.

i went to fire up the motor and the sucking sound (huge sucking sound i may say) was gone, and the motor is idling like it should and is running great with the newly regapped plugs. thanks god, Amen

so this is my story of the symptoms of having jets super loose in your carb!!!! Haha bananaand when i got the carb back from the carb builder, i didn't touch a thing on it besides the idle screws and idle speed.

it looks like i'll make "test n tune" this saturday and then hit up the competition races the following day.
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#10
COOL have fun and be safe
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