78 F150 won't start

Hi, guys

I'm new on this forum. I just bought a nice 78 F150 with a rebuilt 400 eng in it. It was running fine until the other day I decided to clean the engine with gunk and a hose... I started it right afterwards and let it run for a few minutes to dry everything off.

I went back to it a couple of days later and it w/not start. The engine turns fine but it wont even try to light off. I had put it some carb cleaner in the tank, so I thought I had gummed up the fuel filters. I replaced both the one by the tank and the one at the carb inlet. I took the pump off and flushed it with fuel, and it worked fine when I applied 12V to it. (It has no mechanical fuel pump)

I took off all plugs, wires, distributor cap, and all of it looked ok. I didnt get a good ck on the ignition coil so I replaced it. Still no spark.

I read in this and other forums about the Electronic Ignition Module, aka Duraspark box. Mine has neither 2 nor 3 wires... It has SIX wires!!!: red, white, green, green, orange and purple... there are some numbers and letters on the Duraspark box as follows: AA E8FF 12A199.
I understand one can jump two of the wires to determine if the box is bad. Which ones, fellas?

Also, is there any other thing I can ck? I thought maybe one of the key switch connections may be pulled...

I really like the truck, but really wished it were RUNNING!!!!

Thanks in advance.

Quote:

Hi, guys I'm new on this forum. I just bought a nice 78 F150 with a rebuilt 400 eng in it. It was running fine until the other day I decided to clean the engine with gunk and a hose... I started it right afterwards and let it run for a few minutes to dry everything off. I went back to it a couple of days later and it w/not start. The engine turns fine but it wont even try to light off. I had put it some carb cleaner in the tank, so I thought I had gummed up the fuel filters. I replaced both the one by the tank and the one at the carb inlet. I took the pump off and flushed it with fuel, and it worked fine when I applied 12V to it. (It has no mechanical fuel pump) I took off all plugs, wires, distributor cap, and all of it looked ok. I didnt get a good ck on the ignition coil so I replaced it. Still no spark. I read in this and other forums about the Electronic Ignition Module, aka Duraspark box. Mine has neither 2 nor 3 wires... It has SIX wires!!!: red, white, green, green, orange and purple... there are some numbers and letters on the Duraspark box as follows: AA E8FF 12A199. I understand one can jump two of the wires to determine if the box is bad. Which ones, fellas? Also, is there any other thing I can ck? I thought maybe one of the key switch connections may be pulled... I really like the truck, but really wished it were RUNNING!!!! Thanks in advance.

First thing you must do is find out if you got spark, (Do you have any spark out of the plug wires) ?.

If you do, You got a fuel problem.
If not, you got a electrical problem.

I use a screwdriver in one end of the plug wire, then put it close to a ground, then have someone turn the vehicle over, (Do you Have Spark ?.), Better done in the dark too, also be careful if you have spark it will light you up if you are against the vehicle and you become the ground, use padding to prevent this from happen.

Then, You will need to know if you got a Carb or EFI

Carb, Take one end of the fuel line off and crank the truck over, if you got fuel coming out, with a Spark you truck should start, If there is not Fuel - you got a fuel pump problem.
EFI, Remove line for the fuel injection, turn key on, fuel should come out (a lot of fuel under pressure too), if so the truck has spark it will start, If no fuel or low pressure you need to change or check you fuel pump (They also make a PSI guage for testing EFI Fuel Pressure).

I hope this helps