Excessive Engine Pressure
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Joined: Jun 2002
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From: Suffolk, VA USA
Excessive Engine Pressure
I'll throw this into this forum too...the truck's an 86, but the set-up closer to the trucks here.
Here's one for the EFI guys. My 86 5.0 EFI started running sluggishly about a week ago. It kept getting progressively worse, until one day while driving home I got frustrated with it, put the pedal to the floor, and figured either I would get home or the truck would blow up. Well, all of a sudden there was a loud boom, but instead of dying the truck ran great with the excpetion of some exhaust fumes getting into the cab. When I got home I found the AIR tube that feeds the EGR valve blew out. I replaced the AIR tube, the EGR, and the EGR position sensor and the truck started running like dog doo again. Thought it might be a clogged cat, and since I already have a a new high flow set up I've yet to install, I drilled a 1/2 hole into the y pipe in front of the cat to see if it relieved the pressure. No such luck. Did a code scan and the truck is throwing 34r and 13r codes. Any ideas?
Thanks,
Here's one for the EFI guys. My 86 5.0 EFI started running sluggishly about a week ago. It kept getting progressively worse, until one day while driving home I got frustrated with it, put the pedal to the floor, and figured either I would get home or the truck would blow up. Well, all of a sudden there was a loud boom, but instead of dying the truck ran great with the excpetion of some exhaust fumes getting into the cab. When I got home I found the AIR tube that feeds the EGR valve blew out. I replaced the AIR tube, the EGR, and the EGR position sensor and the truck started running like dog doo again. Thought it might be a clogged cat, and since I already have a a new high flow set up I've yet to install, I drilled a 1/2 hole into the y pipe in front of the cat to see if it relieved the pressure. No such luck. Did a code scan and the truck is throwing 34r and 13r codes. Any ideas?
Thanks,
Fleet Mechanic
Joined: Sep 2003
Posts: 1,279
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From: savannah,ga
not sure if your truck will have one but
look at the manifold to exh. pipe connection
see if you have a wieght on a shaft with a spring there
this is a thermostatic controled butterfly valve
this helps the engine warm up quicker
maybe frozen closed
can't remember the "proper" name at this time
some times I get CRS syndrome
look at the manifold to exh. pipe connection
see if you have a wieght on a shaft with a spring there
this is a thermostatic controled butterfly valve
this helps the engine warm up quicker
maybe frozen closed
can't remember the "proper" name at this time
some times I get CRS syndrome
