Truck is vibrating
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Truck is vibrating
I have a 1998 Ford F-150. It started vibrating about a month ago, it vibrates at low speeds and while idling. I changed the spark plugs and bought new cables, that help a bit, but didnt stop the vibrating. Now its vibrating even more anybody know what could be wrong?
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Joined: May 2006
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From: Central Florida
I'd also do the coil packs and fuel filter while tuning up. Also check for vacuum leaks.
However, you might want to put a timing light on it and see if the CPS is on track. If the cam position sensor is off time or failing, you will not be firing the injectors and spark plugs at the right time.
However, you might want to put a timing light on it and see if the CPS is on track. If the cam position sensor is off time or failing, you will not be firing the injectors and spark plugs at the right time.
Post Fiend
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From: Central Florida
If you have more than 120K miles, Compression and leakdown test could give you some usefull info. However, if your truck doesn't have that high of mileage, I wouldn't go that far yet. I am still thinking it's a timing issue.
Trans removal is pretty easy, automatics you have to unbolt the torque converter from the flywheel. Once it's unbolted you pull it just like a manual. Put a jack under the trans and pull the cross-member. Disconnect any electrical harnesses or other connections, and unbolt the trans from the motor. Once the trans is free, lower the jack and the trans will slide out.
Trans removal is pretty easy, automatics you have to unbolt the torque converter from the flywheel. Once it's unbolted you pull it just like a manual. Put a jack under the trans and pull the cross-member. Disconnect any electrical harnesses or other connections, and unbolt the trans from the motor. Once the trans is free, lower the jack and the trans will slide out.
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Post Fiend
Joined: May 2006
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From: Central Florida
250k and 9 years can cause alot of part to wear out. Rubber bushings need to be checked. Ball joints and tierods cause steering problems, so if you can't keep it in one lane, then possibly. TC's would need to have a big problem to cause a heavy vibration, plus it would change as the gears/rpm changed during shifts.
With that kind of mileage, the timing chain could be a bit stretched. Also catalytic converters can cause hesitation and miss-fires, keep an eye on your temp gauge, if it rises over it's normal range, it's another possibility. Because of what you have described, I believe your problem to be a miss-fire. A scan tool could confirm that.
With that kind of mileage, the timing chain could be a bit stretched. Also catalytic converters can cause hesitation and miss-fires, keep an eye on your temp gauge, if it rises over it's normal range, it's another possibility. Because of what you have described, I believe your problem to be a miss-fire. A scan tool could confirm that.
Posting Guru
Joined: Oct 2005
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From: Louisville, Kentucky
Originally Posted by IGGSDA3rd
ok, I understood everything except I dont know what catalytic converters & scan tools are.
Catalytic converters clean up the exhaust from your engine. They are in the exhaust system right out of the exhaust manifolds. There is a O2 sensor in there too. A scan tool is a device that plugs in under the dash on your truck that reads diagnostic codes that are there when ever your check engine light (CEL) is on. The mechanic uses information from a scan tool to guide him in repairs. Good luck!
Post Fiend
Joined: May 2006
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From: Central Florida
The catalytic converters have a mesh in them that changes the exhaust gases into friendly exhaust gases. If they become clogged or damaged, exhaust doesn't flow out like it should. It can limit your top speed, or kill the engine after a couple minutes of running.
Scan tools like the post before said, is a tool that plugs under the dash and reads information from the computer. Incoming air, narrow band o2, miss counters, injector shorts, DTCs, ect. All very handy in tracking down problems that don't throw codes.
Scan tools like the post before said, is a tool that plugs under the dash and reads information from the computer. Incoming air, narrow band o2, miss counters, injector shorts, DTCs, ect. All very handy in tracking down problems that don't throw codes.