PCD's 74 620 progress/build up

[gene knight]

I have a mechanical fuel pump on grimace and it seems fine. But on my vw bug I use a electric fuel pump under the tank. But I have a new metal filter from the tank b4 the pump and another 1 b4 carb.

[Pacific coast Datsun]

Solid advice Niel & i can picture what your describing. Whats wierd & i forgot to mention this is...the night before i started it & once the motor warmed up it sputtered & died. Mind you it was not hot @ that time which kinda tells me it may be the fuel pump crapping out. Im not discrediting the vapor lock scenerio at all but for $$ sake i may replace the pump diaphram & see if that fixes it. Honestly though im so tired of tinkering on this beast & have contemplating selling it but time will tell if that happens.

& thanks Steve for the Buster song...LoL

[Pacific coast Datsun]

Just an FYI in the next few days ill be installing a NEW metal fuel line from the tank to the engine bay. Ill then test drive & see if the issue goes away. I plan on driving to our swdp bbq in this truck.

[Charlie69]

I hope this solves the problem.

[gene knight]

i ran all new metal fuel line from tank to fuel filter in engine bay of grimace then small rubber hose to metal line back to the carb

[Pacific coast Datsun]

Ok today i shot 120 psi into the fuel line both directions, installed new rubber fuel lines in all 3 sections, new fuel filter & i even made a heat shield next to the carb to protect the fuel line from excessive heat. Next is to install a new fuel pump & then do a long test drive.

[gene knight]

GOOD LUCK! LET US KNOW THE STATUS/RESULTS

[Charlie69]

Mark put a half dozen wooden clothes pins on the steel fuel line from the pump to the carb.  These will work as a heat sink.

 

Ran my 50 Studebaker Champion and my uncle's DeSoto this way.

 

http://www.zoro.com/g/00105799/k-G0290936?utm_source=google_shopping&utm_medium=cpc&utm_campaign=Google_Shopping_Feed&gclid=COPOtIvz7r8CFcI7MgodeEIAqA

[Pacific coast Datsun]

Well shes back on the road..the new aftermarket mech. fuel pump seems to have fixed the issue. Also flushed the radiator & put in new coolant. Interesting trick Charlie but the line from the pump to the weber is rubber...will it still work as long as the line doesnt get pinched ?

[Charlie69]

Anything there will absorb heat will help.  Wrapping your fuel line with header tape also helps.  Throw some clothes pins in your tool kit it never hurts.

[Pacific coast Datsun]

Ok here we go again & probably for the last time. The truck stalled on me twice yesterday. The 2nd time on the hwy in 110 degree sun fir 2 hours i tried but she woyldnt fire. At this point i dont even care what it "might be" !!! Ended up paying $100 to tow it home & i give up the truck wins. May have it sold already & or ill pull the motor as a backup for the boat. If anybody wants a 620 with LOTS of body mods fairly cheap send me a PM.

[]2eDeYe]

:(

[gene knight]

I might be interested in it.

[gene knight]

have your tank flushed out maybe to much debris/rust in tank. if you are serious about selling it for a reasonable price i'm interested cuz you know i have always wanted a convertible datsun but couln't bear to cut up grimace

[DATSKAOS]

Ignition?? Put a matchbox dizzy in...or sell it

[Pacific coast Datsun]

Gene..ill let you know.

Ray..it has a matchbox dist already.

I believe its a combo of buying a bad pump & the accel pump on the Weber gone bad.

Itll sit again till i decide what to do with it.

Your right Ray i lost track of the hours i have into it.

[gene knight]

Okay

[Charlie69]

Mark how is your matchbox positioned?  Is the matchbox facing towards the intake/exhaust manifolds?  On the 1980 720 L20B the factory has the distributor turned to where the matchbox faces the radiator.  This will make a big difference in the amount of heat the matchbox absorbs.  Remember her is an electronic devices worst enemy.

 

This is how the matchbox sits in a 1980 720 L20B.  This is a 1976 L20B that is in my 520.

 

 

 

Also Gene has not driven his 521 far enough to know if he needs to change his fuel line setup to include a return line.

[Charlie69]

Mark did this truck have this problem in San Diego?  You can order an accelerator pump from Pierce Manifolds.

 

http://www.piercemanifolds.com/SearchResults.asp?Search=47407.249&Search.x=18&Search.y=10

 

Cheaper way to go.

http://www.piercemanifolds.com/product_p/92.3237.05%20minor.htm

 

 

Or Major Rebuild Kit

http://www.piercemanifolds.com/product_p/92.3237.05%20major.htm

[Pacific coast Datsun]

Charlie TY for those links. This problem did not exist back in San diego so i know it's a heat related issue. Shes still sitting in the garage with a puddle of fuel under the tank...oh boy now what !?

Heres an old vid / slideshow i made years ago showing some of the build progress...

[gene knight]

nice video. maybe we can do some bags on grimace in the rear just like you did. and also the king cab i have

[]2eDeYe]

Nice trip down memory lane :cool:

[Pacific coast Datsun]

Per Charlie in PHX im updating this thread.

The 74 is still in the garage...life & work have been more important lately.

Im sure the carb needs an accel pump & i can get that locally.

[Charlie69]

Mark you are welcome!  It was great visiting with you, and running around Phoenix with Gene.

 

I have a stack of Weber carbs for parts.  If you need anything please let me know.

[Farmer Joe]

good to hear youre still doing well mark. 

 

keep on truckin!!