85 302 EFI rough idle
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Freshman User
Joined: Sep 2002
Posts: 28
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From: Oregon City USA
85 302 EFI rough idle
My buddy ran out of gas with his truck. It has been sitting for a couple months now. It wouldn't fire, just crank and crank, as soon as I changed the plugs it fired right up but the idle is real rough. It also smokes pretty bad when running. Any ideas?
Thanks
Joel
Thanks
Joel
Junior User
Joined: Apr 2001
Posts: 65
Likes: 0
85 302 EFI rough idle
Hi Joel,
I would recommend disconnecting the vacumn hose from the fuel pressure regulator, shake it to see if it spills gas. It is possible the diaphram has rotted causing the engine to suck gas from there.
Another possibility would be the MAP sensor, make sure it has vacumn to it, since it has been sitting for a while, a mouse or squirrel may have chewed tohe hose in two.
The fuel pressure regulator is located to the rear of the engine, I believe the drivers side, its a chrome looking can with a red plastic hose connected to it.
The map sensor is a black box, either on the fender or firewall with a lrge vacumn hose and a plug with 3 wires hooked to it.
I hope this helps, Tim
I would recommend disconnecting the vacumn hose from the fuel pressure regulator, shake it to see if it spills gas. It is possible the diaphram has rotted causing the engine to suck gas from there.
Another possibility would be the MAP sensor, make sure it has vacumn to it, since it has been sitting for a while, a mouse or squirrel may have chewed tohe hose in two.
The fuel pressure regulator is located to the rear of the engine, I believe the drivers side, its a chrome looking can with a red plastic hose connected to it.
The map sensor is a black box, either on the fender or firewall with a lrge vacumn hose and a plug with 3 wires hooked to it.
I hope this helps, Tim
