please help
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New User
Joined: Nov 2005
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please help
I have a 89 ford f-150 with a 4.9L and it will loose power when i accerlerate. I hear a clicking noise when i get on the gas but i cannot hear it at idle. I get really bad gas milage. I'm not sure but i'm about ready to drop another engine in if i can't figure it out.
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Joined: Jul 2005
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What's the mileage on it? Tire size? Modifications? Have you pulled codes? What maintenance steps have you tried? We can help, but need a lot more information.
I wouldn't drop another engine in it until you do some more work to find the problem. Could be a clogged catalytic converter, could be in need of a tune up, bad sensor, etc, etc, etc.
More info please.
I wouldn't drop another engine in it until you do some more work to find the problem. Could be a clogged catalytic converter, could be in need of a tune up, bad sensor, etc, etc, etc.
More info please.
Lead Driver
Joined: Feb 2003
Posts: 8,140
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From: Oak Harbor, OH
Here is where I would start. Throw ~$200 at it and do a tune up. Motorcraft plugs, not platinums, just regular ones (1.99/ea @ auto zone). Napa premium wires (~$60 a set), and the napa premium cap and rotor. Then new filters (air and fuel), then change the oil. See if it still does it. This will rule out most of the ignition system. It almost sounds like you're gettin what is know and spark knock or ping. It's a condition which can be caused by a severe vacuum leak, or bad wires, cap, rotor, or plugs. A clogged fuel can cause it as well as the motor will lean way out if it can get enough fuel.
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it has 31bf goodrich tires about 100,000 miles. I guted the cats and it has no codes. I have put new plugs in a week ago but it still has a prob. How do u find if it is a valve tap? Could it be the injectors i don't know if they could realy click thought loud you can hear it over the engine.
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Elder User
Joined: Mar 2004
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From: Penndel, PA
Stand in front of the truck at idle with the hood open. Open the throttle by hand until the tapping starts. Try to figure out where the sound is coming from. If its coming from under a valve cover its a stuck lifter causing the valve tap.
Have you checked out your exhaust system? Often times a small hole in the exhaust can cause a tapping sound.
Either way, you nee to isolate where the tapping sound is coming from.
Have you checked out your exhaust system? Often times a small hole in the exhaust can cause a tapping sound.
Either way, you nee to isolate where the tapping sound is coming from.
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