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V8-4.9L

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Question
Does a 1994 Cadillac Deville have a crankshaft sensor or do I need to replace the whole distributor?
Hi there. The ignition system for the 4.9L in your vehicle, should be HEI (high energy ignition) and does not have a CKP (crankshaft position sensor). The pick-up coil is inside the distributor and most likely is not the cause...
Question
Car will not start, some accessories inoperative,transmission stalls out?
Hi there. The no start, inoperative radio and turn signals could all be related to a faulty ignition switch. It could also be, a blown fuse(s) for the inoperative radio and turn signals, and the no start could be fuel...
Question
How did I kill 3 alternators and 4 batteries in 6 months?
Your description suggests you may have a bad grounding problem, a short somewhere, or potentially a failing voltage regulator. The voltage regulator regulates the power charged to the battery by the alternator to ensure that the battery is not over...
Question
Serpentine belt keeps coming off
The pulleys will not just lose their alignment. For this to happen, there has been a failure somewhere. One of the most common causes I have found for this problem, on a serpentine belt system, is that the belt tensioner...
Question
Transmission actualization (updated)
Hello - If i understand you correctly, you are asking where the 5 solenoids (you refer to them as "actualizations") for this transmission (4T60E) are located. These solenoids are mounted to the transmissions valve body, which is located inside an...
Question
solenoids for cadillac
Hello - no, the solenoids do not require software updates themselves. Think of them as "On or Off" devices. They do receive commands from the transmission controller, which could have software updates, but the solenoids themselves are isolated components -...
Question
Squealing in 1992 Cadillac DeVille with engine off
Aftermarket electronic mice repellants vended for motor vehicles will make the sound you describe. These are ultrasonic devices. Of course, they are battery operated or USB rechargeable and so won't last forever. I have them in my car(s) and the...
Question
do you really need take out the motor to do the oil pan gasket or is there a way around that?
Hi there: With the 93 Cadillac DeVille V-8, you don't need to remove the engine to remove the oil pan and replace the gasket. You will have to remove lower cross member and some other front engine cover components; which...
Question
My bcm is not working.
Hello. If the computer is quickly overheating and shutting off then it may be possible that excessive voltage or current is flowing too, or through it, causing it to overheat. This can be caused by wiring issues or by a...
Question
I have a 1991 Cadillac DeVille running very poorly very bad fuel economy she runs very poorly no power almost almost like it's bac
Hello. From what you are explaining it sounds like you have a fuel system issue. It sounds like you are getting too much fuel. It can be caused by a leaking fuel injector, but most of the time it is...
Question
Starter replacement
Hi there. It's probably a good idea for you to either view a starter replacement video for your vehicle on YouTube.com or purchase a vehicle service and repair manual for your Cadillac to get the best data and instructions for...
Question
Speedometer not working
Hi There, This could be related to a couple of possibilities. The [instrument voltage regulator]((https://www.yourmechanic.com/services/instrument-voltage-regulator-replacement) regulates the voltage supplied to the various gauges in your vehicle’s dash. When this is not working properly, this may cause the gauges in your...
Question
I got a 95 Cadillac deville. When I go 65 uphill my car drastically loses power.
It is possible that you could be having an issue with your fuel system. It is possible that your fuel pressure regulator is failing causing a lack of sufficient fuel pressure when going up an incline. It is also possible...
Question
door lock motors humming,
Hi there. It is very possible that the power door lock switch itself is damaged or an electrical relay is damaged, which causes a open electrical current to continually run the power lock motor. However, it could be a short...
Question
1993 cadillac seville motor mounts 4.9 engine
Hi there. On most GM V-8's there are four total engine mounts and two transmission mounts. If you'd like to receive a price estimate to have your engine mounts replaced, please click this link to be forwarded to the engine...
Question
I have a 91 cadillac deville with 90,000 miles. If i drive short distances it runs great...if i drive long distance (45 min +) esp
Hi there. When mechanical systems operate for extended periods, or heat is developed, minor issues tend to be amplified; especially with fuel system components like dirty or clogged fuel injectors, air fuel mixture components or fuel and air filters that...
Question
WHEN I ACCELERTE FROM A STOP ITS FINE IT LEAVES BUT ONCE IM GOING 45 MPH IT BOGGS DOWN AND WONT ACCELARATE
Hi there. What you are describing is very common with either a vacuum leak, or an issue with the jetting in the carburetor. Most of the time, a bogging issue is caused by too much fuel (or a rich situation)....
Question
Starts but will not stay running unless you pour gas directly into the engine
It sounds like you may have a fuel supply problem in getting the proper amount of fuel to the fuel injectors. As you know, when you turn the key to on, the fuel pump is activated and the fuel system...
Question
Where is the fuel reset button on my Caddy? 1995 Cadillac Deville
Hello - your Deville does not have a fuel cutoff reset button. If you can't hear the fuel pump running with the key in the "On" or "Start" position, check the fuel pump fuses, then check the fuel pump relay...
Question
Does a water on 4.9L 298 V8 Fi work on a 4.5L V8 pfi
The water pump that was used on the 1988, 1989, and 1990 DeVille with the 4.5L engine (VIN "3" or "5") is identical (same part number) to the pump used on the 1991-1995 DeVille with the 4.9L engine. If you...

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