1986 efi hard cranking
07-03-2017, 05:00 PM
#11
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Location: Melbourne, FL
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Thanks for the help. Sorry it has taken so long to get back to this just been tied up with health issues. I have replaced everything that I can think of on the truck. I hooked up a fuel pressure gauge the other day. As I said f
before when the engine is cold in the morning it cranks just a short time and fires right up. If I drive it for a while and stop for a very short time it fires right back up but if I wait about 15 minutes it will crank just fine but will not fire for about 12 seconds. With the gauge on it shows no fuel pressure at all until about 12 seconds then it jumps up and fires immediately and runs just fire. It does the same thing whether it is in the back or front tank. One other thing over the the past I can be driving the truck and it will just cut off and quit running with no warning but will start back up very fast even while I am coasting I just push it into neutral and start it right back up. Going around a corner it gets a little busy any suggestions. Driving mu truck around town I get 10.2 MPG is that about right with a 302 efi?
Thanks for any help
before when the engine is cold in the morning it cranks just a short time and fires right up. If I drive it for a while and stop for a very short time it fires right back up but if I wait about 15 minutes it will crank just fine but will not fire for about 12 seconds. With the gauge on it shows no fuel pressure at all until about 12 seconds then it jumps up and fires immediately and runs just fire. It does the same thing whether it is in the back or front tank. One other thing over the the past I can be driving the truck and it will just cut off and quit running with no warning but will start back up very fast even while I am coasting I just push it into neutral and start it right back up. Going around a corner it gets a little busy any suggestions. Driving mu truck around town I get 10.2 MPG is that about right with a 302 efi?
Thanks for any help
08-07-2017, 01:38 AM
#12
Old Timer
I have replaced everything that I can think of on the truck.
I hooked up a fuel pressure gauge the other day.
With the gauge on it shows no fuel pressure at all until about 12 seconds then it jumps up and fires immediately and runs just fire.
It does the same thing whether it is in the back or front tank.
I can be driving the truck and it will just cut off and quit running with no warning but will start back up very fast
Driving mu truck around town I get 10.2 MPG is that about right with a 302 efi?
I hooked up a fuel pressure gauge the other day.
With the gauge on it shows no fuel pressure at all until about 12 seconds then it jumps up and fires immediately and runs just fire.
It does the same thing whether it is in the back or front tank.
I can be driving the truck and it will just cut off and quit running with no warning but will start back up very fast
Driving mu truck around town I get 10.2 MPG is that about right with a 302 efi?
10.2 MPG town, about right - you should get an average of 15 MPG combined....
You may have a fuel delivery issue
You may have an heat related electrical issue
List everything you have replaced; ??