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V8-4.7L

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Question
Is shaking above 45 MPH signs of failing torque converter?
A shake at higher speeds can be caused by numerous different things. This could be caused by your engine running badly, out of balance wheel, or even loose suspension components. My best recommendation would be to have your entire vehicle...
Question
Does the crankshaft sensor have to be calibrated before putting into your vehicle
You will need to have the crankshaft sensor relearned in the computer using a scanner and also checked for further codes that will need to be diagnosed.
Question
Would leaking exhaust manifold cause truck to have vacuum leak?
The exhaust and intake manifolds have no connection. Therefore, leaks in one do not affect the other. The only "indirect" issue that might coincidentally implicate both manifolds is if the cylinder head were so warped, or damaged, that leaks developed...
Question
Would coolant leak out of timing cover?
Coolant should not be leaking out of timing cover. You most likely have a water pump or hose leaking. The cooling system should be pressure tested to isolate and locate the leak.
Question
Is a AIR TEMPERATURE SENSOR the same as a MAF?
Hi Jarod. Good to see you again. The ambient air temperature sensor and mass air flow sensor are not the same components. The MAF sensor measures air intake into the engine so it can adjust the fuel trim to be...
Question
Is unplugging MAF while engine running a good way to test it?
Hey Jarod. Thanks for the question tonight. Yeah, when you unplug the MAF sensor it should stall the engine automatically if it's working correctly. If it doesn't stall, the MAF is likely damaged.
Question
RPMs drop and car shakes?
Hi again Jarod. What you're describing is often a sign of a vacuum leak, exhaust leak, fuel restriction or faulty mass air flow sensor (designed to help mix air and fuel together). To be honest, there are more than a...
Question
What are signs of a cracked block?
Hi Jarod. Thanks for the question today. The engine block is a rather large component, meaning that there are multiple warning signs that it's cracked. The leading symptom is a coolant or oil leak not coming from a line or...
Question
Would bad spark plugs cause misfire in cylinder?
A misfire could be caused by a bad spark plug. It could also be caused by a bad coil, fuel injector, an air leak, a compression problem, or a camshaft problem, or yes, even a bad head gasket or a...
Question
Would leaking exhaust manifold throw a code?
If the exhaust system is not air tight, that will skew oxygen sensor readings and a consequence is a false indication of catalyst efficiency. In addition, the upstream sensor will not be providing a valid reading to the computer insofar...
Question
What is causing the engine misfires?
It is usually best to change all the coils when chasing a misfire with engines of this age and mileage. If one is weak, they are likely all weak. When you changed the plugs, was there oil in the spark...
Question
What else can it be?
From what you've described, this sounds like potentially a power steering pump issue since the noise increases with speed which indicates it may be something related to the speed of pulley components. I would check power steering fluid levels to...
Question
Water pump
The 5.7 L engine on the 2007 Toyota Tundra has a timing chain, and the 4.7 L engine has a timing belt. If you have the model with a 4.7 L engine, you will want to purchase a timing...
Question
Vehicle stalls both at idle and while moving without triggering any check engine codes.
This is usually caused by a bad connection from a main power source. On your Dakota, this would be a fusible link or fuse coming directly from the battery. The fuses will be in the power distribution center under the...
Question
Transmission shifts up and down randomly.
This may be a result of a faulty transmission control module. A faulty transmission control module may cause a delay in acceleration or erratic shifting of gears. The transmission control module has various sensors such as vehicle speed sensors, wheel...
Question
Transmission problem?
Hi There, It sounds like your vehicle may be a bit low on transmission fluid or you may potentially have a bad transmission control solenoid. As you know, the transmission works on hydraulic pressure built up from the fluid inside...
Question
Timing kit
Hi and thanks for contacting YourMechanic. When it comes to removing and replacing any part to an engine that is always submersed in oil, it is good to put oil onto the chains, all sprockets and chain guides. I would...
Question
Suspension problem
Using descriptive words to give us an idea of what kind of problem your experiencing is very important in a situation like this. Descriptive words like moaning, squeaking, popping, clunking, etc., can really help give us an idea of where...
Question
Rough idle and RPM fluctuation
Hi There, As you may know, the Manifold Absolute Pressure (MAP) sensor senses engine load and generates a signal that is proportional to the amount of vacuum in the intake manifold. The engine computer then uses this information to adjust...
Question
Rear differential problems
If you are getting a noise from the rear end when you put pressure on it by giving it gas then the cause is going to be the ring and pinion bearings most likely. Have the pinion bearing checked where...

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