AMC 304 in an 86 CJ7 fuel problem? - JeepForum.com

 
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post #1 of 6 Old 05-01-2016, 04:45 PM Thread Starter
inovermyhead2
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1986 CJ7 
 
Join Date: Dec 2011
Location: Holbrook
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AMC 304 in an 86 CJ7 fuel problem?

Been a while since I've been active on the forum but I need some help. I have an 86 CJ7 with an AMC 304. I seem to be having a fuel problem. The engine runs beautiful but when you shut it down, it doesn't want to re start unless you pump the accelerator and then hold your foot to the floor and crank it for about 45 sec. I have a brand new edelbrock 600 with electric choke. I've replaced the entire ignition including points, condenser, cap, rotor, coil. Dwell is approx 28, point gap at .019. I replaced the fuel pump and vented the gas tank with a rollover valve from Tanks INC. Fuel pressure gauge reads approx 5.5-6 psi while at idle. Any thoughts?


http://www.jeepforum.com/forum/f8/83...-pics-1429955/

http://www.jeepforum.com/forum/f8/ju...hread-1325757/

1983 CJ7
350ci Chevy
SM465 Trans
Rancho 2 1/2" lift
Confer Engineering Shackles
32x11.50x15 BFG All Terrains


Quote:
whoever invented Torx bolts should be shot in the face, burned then pissed on - saskcj7
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post #2 of 6 Old 05-02-2016, 06:47 AM
pedal2themetai
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1956 CJ5 
 
Join Date: Apr 2015
Location: Boise
Posts: 340
Timing could cause hard starting issues. did you have to pull the dizzy when you installed intake? might need to put a timing light on it.. Try holding the pedal to the floor before you pump it up which floods the motor and why you have to hold the pedal to the floor
good luck
tim
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post #3 of 6 Old 05-02-2016, 08:45 AM
Fourtrail
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1974 CJ6 
 
Join Date: Dec 2007
Location: Illinois
Posts: 912
I see you are running a point distributor, are you getting full battery voltage to the coil when cranking? If not, you might have a weak spark issue hurting your starting. Also have you made sure that the electric choke is fully open when you are trying to start a warm engine? Needing to hold the pedal fully down when cranking normally means an overly rich/flooded mixture during cranking.

80 CJ-5, 74 CJ-6, 56 CJ-5
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post #4 of 6 Old 05-02-2016, 08:56 AM Thread Starter
inovermyhead2
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1986 CJ7 
 
Join Date: Dec 2011
Location: Holbrook
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I have full voltage to the coil and the choke is in the open position. Drivability is excellent so not sure about a timing issue. I'm wondering if fuel is drawing back into the tank and maybe it needs to re prime when it sits for a while. Just not sure why or how to prevent that from happening if that is in fact the issue.

http://www.jeepforum.com/forum/f8/83...-pics-1429955/

http://www.jeepforum.com/forum/f8/ju...hread-1325757/

1983 CJ7
350ci Chevy
SM465 Trans
Rancho 2 1/2" lift
Confer Engineering Shackles
32x11.50x15 BFG All Terrains


Quote:
whoever invented Torx bolts should be shot in the face, burned then pissed on - saskcj7
inovermyhead2 is offline  
post #5 of 6 Old 05-02-2016, 09:29 AM
Fourtrail
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1974 CJ6 
 
Join Date: Dec 2007
Location: Illinois
Posts: 912
Quote:
Originally Posted by inovermyhead2 View Post
I'm wondering if fuel is drawing back into the tank and maybe it needs to re prime when it sits for a while. Just not sure why or how to prevent that from happening if that is in fact the issue.
That is not an issue with the Edelbrock as the needle/seat is well above the fuel level in the carb and there is no way for it to draw back out. When warm, it should restart without touching the pedal at all if adjusted correctly. I would look into your idle bleed screws and make sure they are adjusted correctly. Also you might need to add a spacer under the carb if you are getting heat soak and boiling the fuel in the bowls, but that would be only on immediate restart and not after it has set for a bit.

80 CJ-5, 74 CJ-6, 56 CJ-5
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post #6 of 6 Old 05-02-2016, 03:56 PM Thread Starter
inovermyhead2
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1986 CJ7 
 
Join Date: Dec 2011
Location: Holbrook
Posts: 523
Thanks for the reply, I didn't know that about an edelbrock. ill check the mixture screw adj. I had set them as per the book. Turn them in until idle changes, then out 1/2-3/4 of a turn.

http://www.jeepforum.com/forum/f8/83...-pics-1429955/

http://www.jeepforum.com/forum/f8/ju...hread-1325757/

1983 CJ7
350ci Chevy
SM465 Trans
Rancho 2 1/2" lift
Confer Engineering Shackles
32x11.50x15 BFG All Terrains


Quote:
whoever invented Torx bolts should be shot in the face, burned then pissed on - saskcj7
inovermyhead2 is offline  
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