Is it exhaust or is it a fuel smell? Exhaust, i would say you almost have to have a leak, check the manifolds and the head pipe really well. Check to see if ti even has an EGR valve at the rear of the intake to the top of the intake manifold, it depends on the emissions label it has under the hood, federal or california. If it is more of a fuel smell check to be sure all of the charcole canister lines and hoses are hooked up and not gone or broken.
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Being fuel injected, it would be spraying out if it were an external leak from the fuel pipes as they run under pressure. If definitely a petrol smell, I would check the top of the fuel tank where the pump fits- is it worse / same with a full tank?
Not to question you but is it a fuel smell or an exhaust gas smell? Reason for my question is that the rocams have a common weak spot of the exhaust flange sealing ring where the exhaust front pipe meets the manifold. They become worn and porous and start blowing under load or when accelerating as the motor tips back.
That smell may be related to an oil leak burning off on an exhaust manifold or pipe. Since you did not report any electrical malfunctions, I'd check that first. When working the engine harder it gets hotter and you will therefore smell the burning more than when just normally driving. I can't see your vehicle so don't give me a bad rating if I'm wrong, but I'd look there first!
dont drive it ,friend oil and coolant are and being forced into the combustion chamber under pressure. if this is a V8 then chrysler havent learnt much over the years ,i had a D5N back in the seventys that used to do this ,you probably need to talk to a current dodge man to find out if it is still the water pump housing ,but i would hope they have solved that problem ,if so it will need a head gasket
Well, usually when a proper running vehicle backfires through the exhaust its caused by an excess in fuel building up in the pipe and igniting. Some newer diesle trucks will spray fuel into the exhaust to clean the emissions and reduce smoke coming out of the tail pipe. You could have a bent or sticking valve that is allowing extra fuel out into the exhaust, or when it went to clean the exhaust (If your model does that) the exhaust might not have been hot enough to ignite the fuel until you put a load on it causing the exhaust temp to jump igniting all the fuel in the tail pipe.
Follow your exhaust manifold down from engine to exhaust pipes etc, you should see them sticking out, 3"-4" approx.length, with wires coming from them. Some are right on manifold, some further down on exhaust pipes.