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running rough

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How Long Does a Timing Chain Last?
A timing chain is a metal chain, as opposed to the timing belt which is made of rubber. The chain is located inside of the engine and needs to be lubricated by...

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Question
Misfires, stalls, general poor performance when the car does run
The problem sounds like the PCV hose that blew off caused the brakes to not have assist and the need to hold the throttle open to keep it running. The running problems are all due to the vacuum leaking from...
Question
Van running rough, cuts off 2000 Dodge Grand Caravan
Hello - there are several problems that can cause rough running and stalling. Fuel system issues including clogged fuel filter or injectors, incorrect fuel pressure can cause this. Dirty or malfunctioning idle air control valve or air leaks in the...
Question
Engine takes to long to warm up I've replaced thermostat already and it misses horrible till it warms up its a 4.9 engine
This engine uses a cooling fan clutch that controls the fan speeds on demand when the engine radiator starts to get hot if increases air flow to cool the engine down and slows the fan when it needs to increase...
Question
Car engine revs way up immediately upon starting engine.
Common causes of high RPM excursion at start-up are typically: large vacuum leak, throttle plate stuck open, cruise control stepper motor stuck in one position; faulty throttle position sensor, and/or faulty idle air control motor or solenoid. If you request...
Question
When stopped at a light rpm will dip from 600 to 500 can then move back up
Although the idle speed can be adjusted, the idle speed of the engine is optimized by the manufacturer for maximum performance and economy of operation. In practice, therefore, there is no value in making any adjustment. Low and/or unstable idle...
Question
Idling very rough after I bought the vehicle.
Hi there. First check for any vacuum leaks. A small vacuum leak will cause the engine to raise up in throttle, but a large vacuum leak will cause an engine to stumble. Check the fuel injectors and see if they...
Question
Engine takes to long to warm up I've replaced thermostat already and it misses horrible till it warms up its a 4.9 engine
These engines are known to get real bad carbon build up on the back sides of the valves. If you engine has a hard time getting to operating temperature then it will also cause the engine to carbon up even...
Question
When I come to a stop my trunk starts shaking. Just started happening.
If the Check Engine Light has come on, it is likely that Diagnostic Trouble Codes have been stored and they can be retrieved by a scan tool. If there are downloadable codes, a Check Engine Light diagnostic will quickly reveal...
Question
Flames coming from the tailpipe and rough idle
Hello there, many common faults will cause your 1984 Dodge D250 to have a rough engine idle and have flames coming from the exhaust. When flames are seen coming form the exhaust it is most often due to unburnt fuel...
Question
Stalls and runs rough sometimes, oil pressure gauge at middle regardless of weather?
Hi there. Considering the vehicle was just picked up from the shop, after repairs and services were performed, leads me to believe something was overlooked. It could be, an intake manifold leak causing the intermittent rough idle and stall. A...
Question
Running rough 2002 Ford Focus
Hi - rough running can be caused by a number of things: misfiring, dirty throttle body, injectors, fuel filter, idle air control valve and so on. There was a technical service bulletin from Ford for this engine which pointed to...
Question
Does not idle when cold
When the engine is cold the engine needs to add more fuel to the engine. If the fuel injectors are dirty or you have carbon build up on the valves then this can cause the running problems. I recommend having...
Question
It's runs really bad upon start up, but if allowed to idle for 30-45 min it will run perfectly.
Hi there. What seems to be happening is your engine is being leaned out when running cold until the engine reaches operating temperature. Check the coolant temperature sensor or the engine temperature sensor. These sensors could have a fault in...
Question
Car does not shift correctly into the right gear when accelarating too fast.
You appear to have a problem with both the engine and the transmission. Diagnostic Trouble Codes, if they have set, should be downloaded from the OBD-II terminal under the steering column. The rough idling is probably resolvable to some extent...
Question
Rough Idle after warm up
It sounds as though you may have a misfire. You didn't mention a check engine light, but normally a misfire would turn it on.Try turning on the key but not starting the car. The check engine light should be lit...
Question
whats wrong with your car dies often and sputters and uses more gas then usual
The symptoms you are describing mean that there is a fault or faults in the ignition, fuel, or air induction systems. Occasionally, the cause is found outside the engine though, for example, if the exhaust system is severely restricted. The...
Question
My car hesitates and I have to press on gas hard for it to kind of smooth on out.
Typically, what you are describing is due to an engine management fault(s) and such faults occur in ignition system components, the fuel system, and/or the air induction system. A possible first approach is to just simply make sure that the...
Question
Hello I just replaced the distributor in my 98 blazer. I set it to 6 o-clock like its suppose to, but it is running really rough.
Hi there. It is possible that the distributor was off by one tooth. This is very common. I suggest removing the distributor, then removing the valve cover to the side that has number 1 cylinder (the valve cover that is...
Question
Rough idle and SEL is flashing. I've replaced all 6 plugs and coil packs. The car still has a rough idle and no power.
Misfiring can be caused by lack of spark or lack of fuel. If the same cylinders are still showing codes for misfiring after replacing the coils, the problem can lie elsewhere. If it is the coils not firing, there can...
Question
Dodge stratus 99 isn't wanting to shift and the engine dies out when stopped.
Hi there. This seems to be an issue with the idle air control valve (IAC) and a possible mass air flow sensor (MAF) that is dirty. Even though the valve and sensor can be damaged or dirty, as long as...

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