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Car has rough idling, occasionally seems it would stall
Hello. Replacing the fuel injectors will not cause this. If it only stalls at idle, I would clean the throttle body first. If it is dirty, then this will occur. If it is fine, then it may be an air...
Car misifires under load, P0300 code
Hello. The P0300 code refers to a detection of a misfire in one of the cylinders. If the car idles fine and only acts up during acceleration with this code coming up, then it is usually caused by a fuel...
The new ignition is locked, cannot turn over
Hello. When you install a new ignition and a new computer, it needs to be reprogrammed to communicate correctly. This can usually only be done at the dealer. If they are not programmed correctly then the computers will not communicate...
The car cannot be started at all
Hello. If the starter and the battery are in good shape then the battery cables need to be tested. These are common failures on this vehicle. If those are fine, then it is either an issue with the ignition switch...
Check engine light stays on
Hello. In order to know why the light is on, I would need to know the codes from the computer. It can be anything for a computer issue to a bad gas cap. I usually scan the computer first to...
Problem with knock sensor or coils
Hi there, many others have reported shaking during idle with the Q45 around that time. Replacing the coils has been reported to fix the issue, however there are other components that could be affecting the engine's smoothness as well so...
I think my Distributor O ring is leaking and can see oil run down from under the Distributor
On your '86 Cadillac Deville, you should be able to find the timing marks down toward the bottom of the water pump. There will be a cylinder looking tube attached to it with numbers on it reading from 0-20. These...
Tire making strange noise
Unfortunately there can be a variety of reasons as to why your Cadillac is experiencing noises in the wheel area. With the information provided being a bit limited, I would recommend enlisting the assistance of a certified mechanic, such as...
What else can cause a shake/vibration/shimmey?
Hello. Although you mention that you have new tires, there are instances where the construction of the tire is such that it will vibrate no matter how well it "appears" to be dynamically balanced. This is based on what...
I have a loss of power when acceleration the car does not drive pass 10 or 15mph I change the plugs and also change the fuel filte
This may be result of a failing or dirty mass airflow sensor. This is a unit that is responsible for regulating the air flow into the engine as it is mixed with fuel prior to being injected into the motor....

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