any help on a fuel injec engine problem
Thread Starter
|
New User
Joined: May 2004
Posts: 9
Likes: 0
any help on a fuel injec engine problem
I have a '88 F150, 300 inline 6 that is sluggish in 3rd and 4th gear. It loses rpm's and tries to die on me. Before I got her she had two fuel tanks, and one has been removed, trans has been replaced and looks like similar type as the original. It has about 75,000 miles on it. I have checked the coil, distributor, plugs and wires. I have pulled the upper intake, lower manifold and head. My next step is to reassemble and check pressure on fuel rail. Any advice and insight is greatly appreciated.
Thread Starter
|
New User
Joined: May 2004
Posts: 9
Likes: 0
in regards to the loss of power. i found that my lower intake is broke where the bolt goes through the manifold by the #6 fuel injector. certainly this doesn't help the performance, but is this the reason i'm having trouble.
New User
Joined: Jun 2004
Posts: 11
Likes: 0
yes. it is a source of problems. I have a 90 I6 /5 speed that has the tab broken off the intake manifold at #6 cylinder. When I pulled the intake, i saw where a gas passage had found a home right through the gasket to the intake port for #6. nice serious leak. I had the intake welded by a good machinist (yes.. welding this aluminium manifold can be done. use 4047 or a little higher welding rod for the higher silicon content).
I reinstalled the intake/exhaust manifolds using double gaskets from napa ( teflon coated ones. ) currently waiting on my fuel injectors to come back from a professional cleaning service. You might as well have that done while you have them out.
Also.... i dont know what the mileage is on yours, but mine had ~200k and the intake was very full of carbon deposits. especially around the injector ports. a thorough job with a sandblaster took care of that. again.. might as well clean it while it is off the truck.
fixing the intake leak will help your problem. but is that the one shot kill for it? i can't tell. but i have the same symptoms.
I reinstalled the intake/exhaust manifolds using double gaskets from napa ( teflon coated ones. ) currently waiting on my fuel injectors to come back from a professional cleaning service. You might as well have that done while you have them out.
Also.... i dont know what the mileage is on yours, but mine had ~200k and the intake was very full of carbon deposits. especially around the injector ports. a thorough job with a sandblaster took care of that. again.. might as well clean it while it is off the truck.
fixing the intake leak will help your problem. but is that the one shot kill for it? i can't tell. but i have the same symptoms.
