55 Fargo Posted June 14, 2011 Report Posted June 14, 2011 Hey all, here is a link from AACA Chrysler board, 1 guys success in dealing with hot weather starts and issues with vapor lock and fuel pump issues. Now this has been discussed many time before, but this Guy has overcome his warm start issues by adding an elctric fuel pump into the mix.... http://forums.aaca.org/f145/vapor-lock-solved-305232.html Quote
Plymouthy Adams Posted June 14, 2011 Report Posted June 14, 2011 I think this is what our member Lou Earlehas told us he has been doing for years on his cars ..not only will it cure this reported ailment..it is also a shot in the arm filling the fuel bowl from the evaporating fuel problem from a car unsed for a period of time...the dry fuel bowl is the prime reason I would ever put on an electric booster pump.. Quote
55 Fargo Posted June 14, 2011 Author Report Posted June 14, 2011 Yes, I do remember Lou stating this Tim, if it works in a Georgia summer,will work here. I figure, I may do this, I am still running my fuel pump, of unknown age, been on the engine for at least 25 years, and most likely 30-40 years, or longer. The ethanol blended fuel does not seem to bother it in the 6000 miles I have put on it, in the last 3 years or so. Quote
greg g Posted June 14, 2011 Report Posted June 14, 2011 Vapor lock can't exist at normal atmosperic pressure.................. Quote
TodFitch Posted June 15, 2011 Report Posted June 15, 2011 Vapor lock can't exist at normal atmosperic pressure.................. But modern fuel has components that can and do vaporize at temperatures easily found at the location of the fuel pump on our cars on a hot day. And those pumps don't pump gas anywhere as well as they pump fluid. So far my fix for this condition is to pour a little water on the fuel pump to get it me started. Then the air flow across the pump as the car moves down the highway is enough to keep things going. This is a pretty recent development for me and has only happened, so far, when restarting after a long hot drive in 95+F heat. Which, fortunately does not occur where I actually live near but not near the town that claims "climate best by government test". And I did not have this problem prior to the introduction of alcohol into the fuel here. Not sure if that is the direct issue of if there are so few cars with carburetors on the road nowadays that they oil industry just does not worry about volatility like they used to. The higher pressures of fuel injected systems with the pumps located inside the gas tank are not affected by that. Quote
55 Fargo Posted June 15, 2011 Author Report Posted June 15, 2011 This condition only has happened to me on super hot days, when under hood temps soar, I firmly believe the ethanol blended gasoline of today can and will do that. I do not have this issue while cruising where air movement can help keep the temps down under hood. It is when I stop the car ona super hot day, that fuel pupm issues have occurred......Fred But modern fuel has components that can and do vaporize at temperatures easily found at the location of the fuel pump on our cars on a hot day. And those pumps don't pump gas anywhere as well as they pump fluid.So far my fix for this condition is to pour a little water on the fuel pump to get it me started. Then the air flow across the pump as the car moves down the highway is enough to keep things going. This is a pretty recent development for me and has only happened, so far, when restarting after a long hot drive in 95+F heat. Which, fortunately does not occur where I actually live near but not near the town that claims "climate best by government test". And I did not have this problem prior to the introduction of alcohol into the fuel here. Not sure if that is the direct issue of if there are so few cars with carburetors on the road nowadays that they oil industry just does not worry about volatility like they used to. The higher pressures of fuel injected systems with the pumps located inside the gas tank are not affected by that. Quote
greg g Posted June 15, 2011 Report Posted June 15, 2011 make sure you're are not sucking air anywhere between the tank and the pump. As where our fuel pumps are located, gravity should keep the line to the pump pretty much full. Quote
James_Douglas Posted June 15, 2011 Report Posted June 15, 2011 http://www430.pair.com/p15d24/mopar_forum/showthread.php?t=26379&highlight=carter+fuel+pump James Quote
knighthawk Posted June 15, 2011 Report Posted June 15, 2011 one thing you guys may want to consider, is adding a fuel return line Add a return line to the tank, or get a sender with a second smaller 1/4'' return line fitting, and install a fuel filter with a 1/4'' return line comming off of it, , between the fuel pump and carb Quote
James_Douglas Posted June 15, 2011 Report Posted June 15, 2011 Like this? http://www430.pair.com/p15d24/mopar_forum/showthread.php?t=26379&highlight=carter+fuel+pump James Quote
190bearplace Posted June 16, 2011 Report Posted June 16, 2011 An old timer once told me the perfect cure for vapor lock. Keep a can of beer in the glove box. If you are in a hurry, shake the beer, open it, and spray it over the pump to cool it down. If you're not in a hurry, open the beer, drink it, and let the pump cool itself. Quote
Plymouthy Adams Posted June 16, 2011 Report Posted June 16, 2011 would this guy have been English and related to a Mr. Lucas? seems they are used to drinking warm beer and this may have been the reason why.. Quote
captden29 Posted June 16, 2011 Report Posted June 16, 2011 i moved my fuel line so it goes away from the hot exhaust manifold, more towards the fender well, and it is getting some airflow from the fan. fuel line does not heat up and the car starts much easier when hot. my cheap flaring tool is always the issue when doing tube work. capt den Quote
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