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Cadillac Eldorado Troubleshooting

What can cause excess gas and smoke from the Eldorado’s exhaust? Or, do you need to troubleshoot AC problems on a Cadillac Eldorado? When you face problems with the Eldorado it can be difficult to deal with especially if you have very little experience with automobiles in general. Therefore, being aware of the repair and replacement parts can go a long way in saving time and effort. This is possible by getting help from automobile Experts online with troubleshooting and diagnosis.

Read below where Experts have answered a few questions for Cadillac Eldorado owners.

How to check the engine fan operation on a 1996 Cadillac Eldorado?

Fans are essentially controlled by the engine computer of the car and typically come on in response to the AC being turned on or when the coolant temperature falls into the appropriate temperature range. Therefore, the fan should run constantly from the time you start the car while cold, with the HVAC system turned off.

What could cause raw gas and excess smoke leaking from the exhaust of the 1997 Cadillac Eldorado?

A couple of issues can cause this problem and make the car run rich. An inaccurate MAP or coolant sensor signal could make the engine run rich, but may not be to the extent where gas leaks. The other cause could be an injector related issue, where either one or more injectors experience mechanical failure or one or more driver circuits as well as those within the engine controller are ‘stuck’ in an ‘on’ position. To deal with it, the driver circuits could be shorted to ground in the harness. To troubleshoot, the first thing would be to check for fault codes as injector driver issues usually set a code. At this point one needs to test for a short to ground. Once you confirm that it has shorted, the engine controller should be unplugged. If the short persists, it is a wiring issue. If the short stops by unplugging, the problem is likely an internally shorted driver and the controller needs to be replaced.

On operating the AC, why did the passenger side first start to blow warm air and then both sides of the 1998 Cadillac Eldorado start blowing warm air?

Most likely, the refrigerant level is low on the Cadillac and this problem displays a symptom of blowing warmer on one side than the other and finally, both sides start to blow warm air. This occurs due to the manner in which the fluid flows through the evaporator. Typically, the ACM would set a code for this type of problem but not necessarily before you start to notice deterioration in performance. To fix this, the refrigerant should be charged. If the problem persists or the refrigerant goes low again, a dye can be added by you or the repairman, to determine or check from where the refrigerant is leaking. 

What can be done if the 1998 Cadillac Eldorado is flashing ‘low refrigerant, AC off’ though a leak is not present?

Prior to troubleshooting and fixing the problem, the key is to ascertain whether there is a leak or the system is very low on refrigerant. The problem is either there is a leak but it cannot be found or on the other hand, the low pressure message is flashing despite the system being full. The first step is that the shop should recover the refrigerant from the system and weigh it to check how much is present. The second step is to pump all the air from the system and check how long a vacuum is retained. In case there is a leak, it can be hard to locate and usually, parts are replaced with the intention to pinpoint the leaking part.

How to troubleshoot a defective blower motor on the 1996 Cadillac Eldorado?

Case Details: The voltage on the motor plug has been checked and full voltage is available and over 5 volts on the middle wire. 

First, check the red wire at the blower motor, it should have 12 volts DC or close. The black wire should have a ground signal. The middle or gray wire should have a fluctuating signal. This means at low speed it should have one signal and as the blower speed increases, the signal should change. If it changes when the blower speed varies, (usually from 1 to 5 volts), it implies the blower programmer is working fine. Most likely, the blower motor itself needs to be replaced. Prior to that, one way to cross verify the blower motor functioning is to tap it while it is switched on to check if it starts operating. In case the signal does not change, it implies the blower programmer should be replaced.

What can be done about a ‘skipping’ problem on a 1993 Cadillac Eldorado?

In most cases, the problem lies with the electronic control system and this would require the computer to be scanned to find the stored fault code or codes. Once this is retrieved, they need to be addressed making that the first area to start the process of troubleshooting or repair. It would also be a good idea to have the condition of the spark plugs and the spark plugs wires checked. If one or more of these are faulty, it could cause the skip problem as described above.

As seen above, Cadillac Eldorado troubleshooting can be simple with help from Experts. When they provide detailed answers and explanations, it puts you in a better position to take the right decision with regard to your particular Eldorado problem. Moreover, this article is an overview of issues faced. If you need answers to your specific Cadillac problem ask Experts online and obtain answers in a quick and affordable manner.

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