Skip the auto shop - Our mechanics make house calls

Q: I have a 1995 dodge ram 1500 with a 5.9 L Magnum and it is making this weird noise that started after a heater core exchange

asked by on

Yeas I was getting this gurgling noise from my dash so changed the heater core now my engine reads cold all the time an is now making this electrical type noise from the top side of my engine and it has had I think would be considered a miss fire but I can't seem to trace it also this weird vacuum type noise when I accelerate as if the intake gasket is bad but just changed that and plenum gasket four months ago and it just don't seem right to me at all it don't feel safe either but I still drive it I have no vacuum lines cracked wither

My car has 287854 miles.
My car has an automatic transmission.

A: Hi and thanks for contacting YourMechanic. ...

Hi and thanks for contacting YourMechanic. First find all of the vacuum lines that are cracked and replace all of them. Then check the heater control valve to see if it has a vacuum leak on it. With the heater off, the valve should be off and shutting the flow to the heater core off and redirecting the coolant back to the engine. Check the coolant hoses to see if they are all the same temperature with the engine at operating temperature. It is possible that the valve has stopped working and is allowing coolant to pass through the heater core making the coolant temperature lower since the heater core acts as a second radiator. The misfire on the engine could simply be a vacuum line split and causing all of the problems. If all of the vacuum lines are replaced and the engine still misfires, then check the distributor cap, rotor, plug wires, and spark plugs for any wear and burn spots. If there is, then I suggest performing a tune up to fix the misfire. If you need further assistance with your vehicle, then seek out a professional, such as one from YourMechanic, to help you with your coolant temperature and engine misfire issues.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Save up to 30%

Get a quote

What others are asking

Q: Heating works only on defrost and works only at high speed

A car that old is not going to have self diagnostics in the heat AC system. So you don't need to bother with checking codes. Most cars use engine vacuum to control the heater flaps, and the defrost is the...

Q: Cold air stops when truck comes to stop

Check to make sure that the cooling fan clutch is engaged. If it isn't locking up normally then the fan will not turn fast enough at idle and cause the A/C to not blow cold at idle. The recirculating door...

Q: Car makes loud tapping/knocking when turning slighly left or left front left tire area. started after clutch replacement

Hello. I would need to know what the noise sounds like in order to get a better understanding on what may be going on. Most of the time, if this occurred right after the transmission is removed and replaced, it...

Related articles

How Long Does a Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...
P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...
Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...