Won't idle
Cargo Master
Joined: Jun 2010
Posts: 2,113
Likes: 4
From: Iowa
Unplug the wire and remove the two little bolts and remove it, The gasket is often reusable but would recommend a new one especially if you replace it.
There will be two ports that go into the intake soak both of them with carburetor cleaner and let them sit for a bit, then blast and scrub all the crud you can out of it.... Occasionally the control motor can die and require replacement but that's a little more uncommon.
Edit, thanks for the picture 88XLTLariat.
There will be two ports that go into the intake soak both of them with carburetor cleaner and let them sit for a bit, then blast and scrub all the crud you can out of it.... Occasionally the control motor can die and require replacement but that's a little more uncommon.
Edit, thanks for the picture 88XLTLariat.
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Freshman User
Joined: Sep 2015
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Well my neighbor and I looked at it last night and the EGR leaking pretty bad. Check the vacuum lines and all seemed to be ok.. Would the EGR cause it not to idle? It sounds like an old tractor right now, however if I replace the EGR that should fix that. The base gasket on the carb looked fine too as we sprayed carb cleaner around it and didn't leak
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Freshman User
Joined: Sep 2015
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Well my neighbor and I looked at it last night and the EGR leaking pretty bad. Check the vacuum lines and all seemed to be ok.. Would the EGR cause it not to idle? It sounds like an old tractor right now, however if I replace the EGR that should fix that. The base gasket on the carb looked fine too as we sprayed carb cleaner around it and didn't leak
Hotshot
Joined: Jun 2015
Posts: 12,877
Likes: 2,446
Was reading through this waiting for the OP to mention it was carburated. The 300 and 302 went to FI in '86 but the 351 didn't go to FI until '88.
Have you checked/ replaced the fuel filter? It might be partially clogged
Have you checked/ replaced the fuel filter? It might be partially clogged
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Freshman User
Joined: Sep 2015
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I replaced the in line fuel filter going into the carb yes, I have not checked the other one. I'm about certain it's the EGR.. I was told you can remove all your vacuum lines (except your lines for heat/ac) and it would get you more mpg and potentially more power. Any thoughts on that? I have vacuum lines galore..
Cargo Master
Joined: Jun 2010
Posts: 2,113
Likes: 4
From: Iowa
I replaced the in line fuel filter going into the carb yes, I have not checked the other one. I'm about certain it's the EGR.. I was told you can remove all your vacuum lines (except your lines for heat/ac) and it would get you more mpg and potentially more power. Any thoughts on that? I have vacuum lines galore..
It probably would help a maintenance neglected truck with huge vacuum leaks through the vacuum system that could and should've been fixed but I would question a correctly maintenance truck doing a whole lot better with just a vacuum delete.
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Freshman User
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I wouldn't recommend doing that unless you really know what you're doing, unhooking the vacuum to the EGR for example can cause preignition pinging issues under load and other things can cause other problems without knowing how that vacuum line affects how it runs.
It probably would help a maintenance neglected truck with huge vacuum leaks through the vacuum system that could and should've been fixed but I would question a correctly maintenance truck doing a whole lot better with just a vacuum delete.
It probably would help a maintenance neglected truck with huge vacuum leaks through the vacuum system that could and should've been fixed but I would question a correctly maintenance truck doing a whole lot better with just a vacuum delete.
Cargo Master
Joined: Jun 2010
Posts: 2,113
Likes: 4
From: Iowa
Ok thanks for the information.. I pulled the EGR tonight out of my truck and was wondering how do you know if it's bad? You can press down on the valve and it moves fine. Wondering if I should just replace the gasket and mount the old one back up and see what happens or buy a new EGR (think there about $70) and put that in? Is there anyway to test it? What would you do?