davidledge Posted June 29, 2013 Share Posted June 29, 2013 I recently acquired a 1922 Franklin and after getting it to crank and run it has a problem if I try to give it full throttle. It spits and sputters if it is setting or going down the highway. I have tried cleaning the points, adjusted the timing, carb mixture, i was told to set the plug gap to 31,000, cleaned the carb best of my ability, tried different plugs and nothing seems to help. any suggestions? Link to comment Share on other sites More sharing options...
trimacar Posted June 29, 2013 Share Posted June 29, 2013 Well, wild axx guess, but if your carburetor is good, check all the fittings on the fuel line. If you go to a hardware store and buy the straight and 90 degree fittings, the orifices are incredibly small. Original fittings have nice big openings, and if you even slightly restrict gas flow (particularly with E10 additive gas, which has about 90-95% of the energy value of regular gas), then there'll be problems.Along that line, I'd also check the fuel pump for damage to diaphragm, gas tank for sediment, and so forth. It sounds like a fuel delivery problem, diagnosed from XX miles away on the internet.... Link to comment Share on other sites More sharing options...
paulrhd29nz Posted June 30, 2013 Share Posted June 30, 2013 If it has not ran for a long time, It my be the float level is incorrect for modern gas. Is it running rich or lean? Are you using the original vacum tank or an electric fuel pump? Link to comment Share on other sites More sharing options...
RansomEli Posted June 30, 2013 Share Posted June 30, 2013 David,There is a Franklin forum on this AACA site. There are some very knowledgeable experts who can help you out. Suggest you repost your question there. A rough guess is that your points and timing are OK -- a spitting/popping sound indicates you are not getting enough fuel. Start from your gas tank to the fuel filter to the pump/vacuum tank to the carb, eliminating each potential problem at time. I have a 1921 Franklin and set my spark plug gap to .034. Link to comment Share on other sites More sharing options...
davidledge Posted June 30, 2013 Author Share Posted June 30, 2013 If it has not ran for a long time, It my be the float level is incorrect for modern gas. Is it running rich or lean? Are you using the original vacum tank or an electric fuel pump?It is not running rich or lean I can adjust the mixture and it does not help. The vacuum tank is working well, I have tried to eliminate any obstruction in the lines. It runs well if you do not push it up to about 40 mph, if you try for more it starts to spit and sputter. It has a Dodge carb with stewart carburetor on it. I wonder if it is not giving enough fuel for the HP? Link to comment Share on other sites More sharing options...
JV Puleo Posted June 30, 2013 Share Posted June 30, 2013 That would certainly give you the symptoms you describe. You'll have to find out what the correct carburetor was but, off hand, I can't imagine one made for a 4 cylinder dodge being big enough... of course dodge made bigger engines too. There is a member here that goes by the name "carbking" who can almost certainly tell you if the one you are using is too small. I had the identical problem with a 3 liter Bentley many years ago. A previous owner had given up on the infamous sloper SUs and replaced them with a home made intake manifold and an brass era Schebler. It started and ran just fine up to about 40mph then simply died. Link to comment Share on other sites More sharing options...
Recommended Posts
Create an account or sign in to comment
You need to be a member in order to leave a comment
Create an account
Sign up for a new account in our community. It's easy!
Register a new accountSign in
Already have an account? Sign in here.
Sign In Now