ok ive flushed out the fuel lines and got in a whole new fuel tank and sending unit. i have also switched to pertronix igntor system II. and drove her up and down the street for a total of 10 miles and she rain great didnt cut out at all like she was almost every coupe of miles. then drove back down my drive way and put her in park and then she died, and wouldnt start back up but let it sit for a little and started again but wouldnt hold an idle. i adjusted the idle screw to the point was its idleing, high but will hold. now the idle is weird. it runs real high and then drops down for a second and then speeds back up. its not steady what could it be??? more carb adjustments or something electrical????
Not sure what could be wrong. I have read that the Pertronix has to have a specified voltage and the origional wire does not have it.
If you had rust issues with the fuel tank/lines...You probably have some dead horses(rust flakes) in the carb blocking the needle open or clogging a passage or three.The Idle going up and down (surgeing)is usually a signe of an over rich/lean condition.Have you installed a fresh/clean fuel filter along with the rest of the fuel system repairs???
well i was told my carb was a holley 4160 from a 85 mustang here is a pic if he was telling me wrong (old owner). i mean it could be one of two things right the plug wires or the carb right?
vapor lock? If you can start the car 2 hours later with it running fine it might be vapor lock. Incorrect timing plus bad carb tuning can get things pretty hot which if things go bad causes vapor lock. Also check your plugs to make sure you didn't foul them out.(where I would start first). Just how did you flush out the tank?
yes a whole new sending unit which has a new filter. is there a filter in the stock fuel pump?? and yes when i blew out the fuel lines there was a ton of rust and fuel that was very dark that came out.
I feel you have a fuel delivery issue...plug wires wont make the idle surge... Do you know if the in line filter screen behind the banjo fitting is still in there? if so, I bet its plugged up with rust if you havent cleaned it out.
There is no filter integral with the stock mechanicle fuel pump.You need to run an inline filter between the pump and carb... Sound like your carb is full of dead horses...pull the carb off After you buy a rebuild kit for it and pull the bowls/metering blocks off and clean it all up,flush and blow out all the passages re assemble it according to the instructions supplied in the carb kit and go from there...
Maybe not but it could be something to consider verifying since he did do the switch. I wasn't thinking this could be his problem, just sharing info that I have received. Mostly on page 1 and 2 http://mmb.maverick.to/showthread.php?t=24973&highlight=Pertronix I would bet that it could be in the fuel system. He mentioned a new tank but debris can be from anywhere. New filter is a cheap replacement. Try getting one you can see into, but not the glass one with the replaceable screens. Those can leak and I don't think they filter very well.
The screen is behind the banjo fitting that the fuel line attaches too on the carb fuel bowl.Disconnect the fuel line then loosen the nut holding the barbed fitting to the carb fuel bowl.If it hasent allready been discarded there will be a brass screen type filter in the opening...remove it and clean it.If its gone and you havent had a fuel filter in line between the pump and carb...you have a carb full of rust...
