running rough
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running rough
Just recently my 93 3.0l began to run really rough between 50 and 60 mph. It will do this until the engine warms up a good bit and everyonce in a while it will do it at any speed when it gets cool outside or it rains. It seems to happen the most while accelerating wether its a slow acceleration or a hard acceleration but it will stop if accelerated hard enough to pick up the overdrive. Any suggestions to what might could cause this?
Thanks in advance,
Jason
Thanks in advance,
Jason
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Joined: Jan 2004
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From: North Alabama
Originally Posted by jasonspruill
I believe the injectors are good, there is a noticable ticking sound under the hood. My friend suggested a fuel pressure regulator i might purchase one to see if it solves my problem.
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Joined: Aug 2003
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From: Corpus Christi, Tx. 78418
Check the fuel pressure regulator with a pressure gauge. If you decide to change it, Dave is right. I had to cut some off the end of an allen wrench so it could fit under the regulator to remove the screws. Don't know why they designed it this way. Looks to me like it would have been easier to just make the screws enter from the top. Guess the engineers??? just wanted to design a new tool for Ford dealerships.
Ron
Ron
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I replaced the plugs last year with a set of bosch platinums and a set of accel plug wires. When I have the chance ill start with checking the ones on the passenger side first as they are the least difficult of the 6. It may just be a plug wire that i didnt know was laying on the engine block that has melted and shorting out. I dont have a vaccum gauge so ill just check for damaged hoses here in a few minutes after the engine cools down a little.
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Joe Kucinski
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Joined: Aug 2003
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From: Corpus Christi, Tx. 78418
You can check the fuel pressure regulator vacuum line by pulling the line and looking to see if any fuel or fuel vapor can be smelled in the line. You may have a slow leak in the diaphram of the regulator. You might also check your oil for a fuel smell as it is possible for a faulty regulator to contaminate the oil with fuel.
The only effective way to check the fuel pressure regulator is with a pressure gauge attached to the fuel rail. With the pressure gauge attached, key to "Run" (KOEO), the fuel pump should run approx. 2 sec. Fuel pressure should be 35-45 psi and remain steady. If fuel pressure drops to zero when the fuel pump stops, the regulator is bad.
Ron
The only effective way to check the fuel pressure regulator is with a pressure gauge attached to the fuel rail. With the pressure gauge attached, key to "Run" (KOEO), the fuel pump should run approx. 2 sec. Fuel pressure should be 35-45 psi and remain steady. If fuel pressure drops to zero when the fuel pump stops, the regulator is bad.
Ron
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Joined: Jan 2004
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From: North Alabama
When I ground off my allen wrench, it mushed out and I had to reshape it. If you taper the end very slightly, it's easier to fit iti nto the screws.
My guess on the design is that they attach the regulator to the rail before the rail is installed.
My guess on the design is that they attach the regulator to the rail before the rail is installed.