Can someone help me diagnose my fuel- air problem? This winter- traveling in humid freezing conditions- our 3.8 V6 1996 Grand Caravan will loose power and rapidly falter and die. Can sputter on for a mile or two, then the problem will eventually worsen until we come to a halt and engine dies. If we wait for a good period of time - can procede for a mile or two, or sometimes 20 miles. If we do not wait long before restarting - try to rush it - it will only get a short distance before the problem reoccurs. Has happened after we filled up with new fuel from unfamiliar stations. However adding gas line anti-freeze has little effect. Best thing to do is walk away and give it time. Carburator ice comes to mind, we had that problem once with a earlier model - but we have had no problems with this van before in the last 8 years of driving. Same weather, why now?
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the entire system must be in good working condition for a vehicle to start in cold weather. Strong battery, clean cable connections at the battery, good starter, clean/gapped plugs, clean injectors, good plug wires, clean fuel filter, clean air filer, and good gas. If a vehicle sits with a partially filled tank for long periods, condensation can form in the tank and freeze. Use gas line antiifreeze in the winter.
an internal combustion engine needs three conditions present to run. These conditions are compression, ignition, and fuel. A diagnosis of the no start condition involves hunting for these conditions to verify their presence.
Your jeep may be out of gas. The fuel system may be full of stale or watery gas. The fuel pump may have died or the filter or injectors may be clogged. These malfunctions will stop the fuel from reaching the cylinders.
Your jeep may not be getting spark. You may have fouled spark plugs or bad plug wires. Then again, you may have a bad sensor causing no spark.
You may have engine damage. A bad head gasket, fried piston rings, or burnt and bent valves may be killing your compression.
If you're saying you may have ice stuck in the hose that goes into your gas tank, yes Heet is fine. Heet is just fuel additive that gets rid of water and keep gas from freezing in the lines. If ice is out of the question, I'd have your tank dropped, might have something that died in there ie. mouse that made a home in there?
try running the heater in demist mode as well as the ac unit. The inside ice is water vapour in the air in the cab freezing on the screen so if you have hot air that is having the water vapour being removed (from the ac action of removing the vapour or humidity) blowing on the screen then the ice should disappear
try running the ac as well as the heater. The ac removes the humidity (water vapour) in the air in the car which is causing the fogging up . Hot moist air on glass creates fog ( same as clouds). You will get a comfortable temperature inside without the fog
Hello, it is possible you could of purchased some low quality fuel or some that had water in it. The engine light came on because one of the sensors detected a malfunction. You can run a diagnostic scan to see if there are codes in the computers memory.If no codes are found, & it is running ok now, drive it until the condition returns. (it may not) If and when the engine light comes back on, a diagnostic scan can determine the cause. I hope this information helps.
You need to check the fuel pressure (Will need a tool for checking fuel pressure) Should be at least above 40 psi. Also if you are in a cold winter area there could be sufficient water in the system to freeze in the line and or fuel filter. If not froze up it could a fuel pump failure. You will have to diagnose it step by step.
I'm not familiar with the Renault specifically, but most vehicles have a method of dealing with carburetor icing. When the weather is cool and damp and the air is sucked into either a carburetor or throttle body, the air pressure changes. Inside the intake manifold there is a significant vacuum condition. That sudden drop in air pressure causes the air temperature to drop significantly and can cause humidity in the air to condense on any available surface. While the rest of the engine is quite hot, the air intake can be quite cold. After running for a period of time, an ice ball can develop on the inside of the air intake; when that occurs, the engine will be incapable of proper operation and can stop running, at which point the heat from the engine will diffuse, warming the intake and melting the ice. To solve that problem, most vehicle manufacturers use a carburetor de-icing system that basically consists of a tube that runs from around the exhaust manifold up to the air intake. By the time any ice can start to build up on the inside of the air intake, the outside of the exhaust manifold has become quite warm, and any air that passes the exhaust manifold is heated enough to prevent the icing problem. So the short answer is, make certain that the tube is in place, provided that Renault's used that system.
Backfire in an automobile engine typically results from various malfunctions related to the air fuel ratio.Backfiring can occur in carburetor engines that are running lean where the air-fuel mixture has insufficient fuel and whenever the timing is too advanced. As the engine runs leaner or if there is less time for the fuel to burn in the combustion chamber, there is a tendency for incomplete combustion. The condition that causes this is a misfire. The result of a misfire or incomplete combustion is that unburned fuel or flammable hydrocarbons are delivered to the exhaust manifold where it may ignite unpredictably.
When starting an engine, timing that is too advanced will fire the spark plug before the intake valve is closed. The flame front will travel back in to the intake manifold, igniting all of that air and fuel as well. The resulting explosion then travels out of the carburetor and air cleaner. A common air filter will allow the gases to escape, but will block the flame front. On many small marine engines, no air filter is used, but a screen is placed over the intake of the carburetor as a flame arrest to prevent these flames from escaping the intake, and potentially igniting fuel, or fuel vapors in the enclosed sump or bilge of the boat and causing a fire or explosion. Improperly adjusted carburetors that create a lean condition during acceleration can cause the air fuel mixture to burn so slowly, that combustion is still taking place during the exhaust stroke, and even when the intake valve opens. The flame front can then travel up the intake and cause a backfire. In this situation it is conceivable that there is a backfire occurring in the intake manifold and exhaust manifold simultaneously.
Good luck and hope this helps, check the carburetor settings to make sure it's not running too lean and the timing . Keep me posted, be glad to help you get your RV running 100% again.