Q: I have a 2004 Dodge Ram 1500 5.7 Hemi engine V8

asked by on February 08, 2017

I have put over $1,100 in their maintenance and parts into the truck I have put on a new throttle body put vale Springs in the engine I've had a manifold kit put it I've had spark plugs and a map sensor put on when the truck itself is started and it idle about five minutes then I have blue smoke coming out of my tailpipe the Thunderbolt light on my dashboard which is the throttle body light pops on and off my truck begin to stall and I have to put one foot on the brake and one foot on the gas because it wants to shut itself off everybody keeps telling me I need a new engine but I feel that it's only a simple problem one mechanic have told me that dealing with my oil cap when he took it off when he put the palm of his hand on the top of my oil cap is sucking air in and he said it's supposed to reverse itself instead of sucking air in it supposed to be able to suck air out take it out but could you tell me what's going on after I've said all this.

Hi There,

It sounds like you may have a couple of separate issues going on here. The idling problem may suggest you have a dirty or faulty idle air control valve. The idle air control valve monitors the air intake as it is mixed with fuel prior to being injected into the engine at low speeds and at idle. This valve is controlled by the vehicle’s computer and will adjust idle speed based upon other measurements such as engine temperature, intake air temperature and electrical system load or voltage. This is also an important function when starting the motor as it allows the motor to run and idle on it’s own once the motor fires. When you accelerate, the engine RPM increases, and as you let off the gas, the RPM slowly returns to the normal idling speed with the help of the idle air control valve making the transition from a higher RPM back down to idle speed while adjusting the air/fuel ratio constantly to allow this to happen smoothly. When the engine RPM drops below the normal range of about ~800 RPM, this often times will cause the engine to stall indicating a dirty or faulty idle air control valve.

Blue smoke coming from your exhaust generally means that the motor is burning the engine oil. This can happen for a couple of different reasons such as worn piston rings or leaking valve guide seals. When this happens, the engine oil is burned in the combustion chamber along with the fuel which is what generates the blue smoke coming from the exhaust. I would recommend having an expert from YourMechanic come to your location to diagnose and inspect your vehicle.

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・Fair and transparent pricing

What others are asking

When I go to use fix-a-flat I can hear my tire deflating more

First of all, fix-a-flat is to be used as a backup to using a good spare tire. If you add the fix-a-flat to a leaking tire, you should follow the directions on the can to add the liquid to the...

I had my timing belt and water pump replaced 45000 miles ago. Now I am told I need to replace water pump. Is this normal?

Hello there, 45,000 miles is a short lifespan for a water pump on your 2000 Honda Odyssey. There are a few reasons the water pump will need to be replaced, such as a pump bearing failure, water pump seal leak,...

Brake light on and brakes not working right.

Hi there. From the description you have provided, your vehicle emergency brake light always on and brake pedal goes all the way to the floor, is a safety concern and your vehicle should not be driven until, repairs are performed....

ABS Light on

Hello. This problem is common on many GM high-end vehicles with that system. A scanner helps to determine the exact cause, as it may be from a variety of problems including steering position sensor, wheel speed sensor, or the vehicle...

I installed a after market radio in my 2002 Cadillac Deville and no sounds will come from my speakers. But when I put my stock rad

Your car might have a built in amplifier that requires a 12 volt signal to be sent in order to turn on the amplifier. The wiring harness for your stock radio may already accommodate that but the new radio has...

MY GMC ENVOY 2007 CAR IS CREATING A NOISE ESPECIALLY ON BUMPY RODAS.SOUND IS COMING FROM DRIVING SEAT TIRE SIDE AND ONLY ON BUMPY

Hello, thank you for writing in. The best option is to recreate the noise and pinpoint where it is coming from. You can do a bounce test to test the suspension components. Go to each bumper and press down on...

I hear a clink sound when I put my car in reverse

My guess is that you have a bad transmission mount or motor mount. You probably noticed this more when the engine is cold because the idle is higher. A trained professional, such as one from YourMechanic, will be able to...

Some doors lock an some don't. 1 day frt pass may lock next day not. Like a whack a mole thing. Same whith unlocking. It's a 4 dr.

If you door lock motors get out of sync then just hit the unlock button several times to see if all doors unlock and then see if they will lock all together from door switch? If they do not straighten...

When a car doesn't want to shift, what sensor is it for on a Cadillac SRX 2005?

Hi there. There are three different types of sensors and solenoids that will cause a transmission to not shift. 1. --- Transmission Position Sensor 2. --- Vehicle Speed Sensor 3. --- Shift Solenoids All three types of sensors and solenoids...

Related articles

How to Buy a Good Quality Serpentine/Drive Belt
Serpentine Serpentine belts are one of those odd components that just help everything else inside the vehicle hang together and just work by helping everything else become synchronized. The serpentine drive belt connects a huge variety of components of the...
How to Get Smog Technician Certified in Maine
Automotive technician jobs include smog certified emissions inspectors. In Maine, you can obtain ASE certification to become one.
How to Tint Your Tail Lights
The The car that you drive is a reflection on your personality. If something on your car doesn’t quite fit the mold, you can customize it so that it suits you better. Car modification is a big business. Companies...