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V8-4.4L

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Q: Rough idling
Rough idle can be due to a bad tank of gasoline, dirty fuel injectors, incorrect idle speed, exhaust restrictions, vacuum leaks, incorrectly installed or damaged spark plugs, a defective or clogged fuel pump or fuel filter, failing electrical components such...
Question
My 03 745 li is over heating I changed thermostat and thermostat housing my car idols for five minutes and message comes on overhe
There may be trapped air in the cooling system. Air can get trapped if you drain coolant and then refill the system without purging. Trapped air can cause overheating by blocking coolant flow and can also faulty heater operation. Other...
Question
i have a 2002 bmw 745li and im getting a message that says trans range N only when engine is on i just had trans service done
It is very possible that transmission damage could have occurred when the transmission overheated. This can only be determined usually by removing the transmission and checking all parts thoroughly. In this situation I would recommend having a transmission inspected by...
Question
I have water in my engine oil, is the engine okay?
There's no good spin I can put on this. It's very likely that you've done some damage to your engine. The oil circulation is pretty high, so it's almost certain that the water was stirred up into the oil and...
Question
Hi I have 97 BMW 540i, replaced radiator, water pump, and thermostat.. and a engine temperature sensor and it is still overheating
The heater not working in some cases may be related to the overheating problem you are also having. This may be due to a faulty heater blower motor or potentially a bad heater core. As you may know, the heater...
Question
My 2001 BMW 740 IL Transmission Failsafe light came on when I put the car into drive
Your car has an electronically controlled transmission. If the controller detects a fault in the transmission it goes into failsafe mode to "work around" the problem. It might for instance skip a gear that it finds to be a problem...
Question
Engine misfire
by many different problems and are generally caused by either a spark or fuel issue or in some cases, a combination of both. Spark related problems generally will result from things like ignition coils, crankshaft position sensor, spark plugs, spark...
Question
Where is the a.c. compressor located on a 2006 range rover hse
The relay is in the main under hood fuse box and that box is typically right next to the battery. If you suspect an issue with the relay it should be tested prior to condemning it. Such testing is straightforward...
Question
WHERE IS THE CRANKSHAFT POSITION SENSOR ON THE 2004 BMW 745LI?
The crankshaft sensor is located on bottom right of transmission bell housing.
Question
I have a 03 BMW 745i I was running fine untell I park it over night an when I wake up to start the car it crank put don't start
Hi Tevin. Thanks for contacting us tonight. If you can engage the starter (meaning it cranks over) but will not start, then it's either a fuel or ignition system failure. Some of the common components that can cause this include...
Question
I was driving and my raidiator busted and my car shut down and It won’t start
Lending cars, Whew! it never turns out well. Its hard to imagine all those things going at once. The only scenario I can come up with is that the serpentine belt may have failed, possibly damaging the radiator, but also...
Question
2001 BMW 740il fuel pump replacement
If the pump has failed, depending on the failure mode of the pump, you can diagnose the fuel pump yourself. Turn the key to the ignition (run) position. At that instant, you should hear a momentary whirring noise from the...
Question
Car idling rough after replacing alternator
After replacing the alternator, your vehicle's ECM will need to go through a "relearning" process whereby it will take a day or two for it to relearn the computer's parameters and adjust. If by replacing the alternator, the battery was...
Question
I changed my foglights to led's and when I tried to start the car it did not start all kind of photo showing up and my I drive scr
Hello, thank you for writing in. The first thing to check is the installation. Make sure the power supply was hooked up correctly, as LEDs are polarized and must be wired perfectly. Secondly, you want to make sure the wires...
Question
2006 RR 4.4l got a P0628 fuel pump low voltage, both relays are good both fuses are good no voltage to signal relay to close and r
If the relay is not being powered, trace the circuit backward to the power source using the factory wiring diagram. You will find the interruption, or the faulty control module, if applicable, using that strategy. A similar procedure has to...
Question
P0505 code Idle Air Control for bmw 540i
The TPS can have between 5 and 10 different codes and all will be caused by different failures of the TPS, Throttle body, wiring or computer issues and you will need to supply the code you get to help you...
Question
How do i turn on the heated seats in a 2005 bmw 545i ?
Hi Travis. Thanks for sending your question to us tonight. You can find the instructions for turning on your heated seats by reviewing the owner manual. You can also click this link to access the manual online.
Question
Smoking from under the hood
The smoke could be from leaking oil that is dripping on a hot engine part, such as the exhaust manifold, and then vaporizing. An antifreeze leak is also a possibility. To resolve this, on a mobile basis, right at your...
Question
Water leaking from pillar sunroof drain into passenger footwell
Yes, diagnosing the leak and implementing the required repairs is no problem and is a fully covered service. To request that service, you can schedule via YourMechanic's leak diagnostic service page. If the drain tube is readily accessible, I can't...
Question
Q: Car won't start
Hi Denise. Thanks for contacting us today. Typically, when you turn the key and get the clicking sound, it's due to one of three possible issues. Either the battery does not have enough cranking amps or cables are loose, an...

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