Question about 2002 Dodge Neon

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Car rides rough

Error codes:
P1390
P0601

car dash board rattles when idle and drives rough. Could it also be my spark plugs, and or the ignition wires.

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According to what i find the PCM Read only memory has a problem that is the main computer, that is most likely your problem

Posted on Sep 17, 2008

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2005 buick lacrosse 3.8 changed spark plugs coils N wires still shakes and sputters rough idle


The basics for vehicle with rough idle, check for a leak of some kind, fuel--egr--vacuum leak. How long since an over-all tune-up? You can check the idle air system? Any applicable trouble codes? To check codes yourself, at the least, you need an obd2 code reader.
If spark issue, sometimes you can use a digital multimeter to do some testing, low tech, non--invasive. With digital multimeter on low voltage setting, engine idling, touch spark plug wires, one at a time, do not penetrate insulation, don't take spark plug wire loose, it's an inductive reading. The point is if you get a reading bouncing off zero, that is where you start testing. I know you changed the coil/s, but sometimes, you need to check ignition module. I'm not saying that module is faulty, I don't know.

Feb 25, 2017 | Buick Cars & Trucks

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Rough idle


sounds like a tune up will fix it. its must likely a bad spark plug or ignition wire

Apr 18, 2014 | 2000 Kia Sportage

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01 toyota avalon with codes PO300-306 car runs rough and idles rough now while driving it start loosing power and making a snake rattling sound


Is the rattling sound coming from the exhaust? I'm wondering if perhaps you have a loose catalytic converter. P0300 (multiple cylinder misfires) and P0306 (cylinder #6 misfire detected) are probably the cause as to why the car is sluggish, shakes, runs rough and lacks power. Make sure to take a close look at your ignition system (spark plugs, ignition wires, coils...). A spray bottle filled with soapy water can help you find voltage leaks on the wires and coils. Just spray the wires and coils and look for arcing. Replace any component that arcs. Other causes can be fuel injectors, vacuum leaks...).

Mar 03, 2013 | 2001 Toyota Avalon

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Cose p0306


Code p0306 means that cylinder six is misfiring. Take it to a mechanic or try to fix it yourself. Change spark plug, plug wires, solenoid.

Aug 27, 2012 | 2004 Chevrolet TrailBlazer

1 Answer

Same issue with the rough idle with a warm engine 4.0 Ranger


i would think a plugged fuel injector on # 6 cylinder could be the problem,or a big vacuum leak at that cylinder
a valve burnt/stuck could be but you dont see much of that anymore
could be coolant leaking into cylinder from leaky haed gasket but you would have to add coolant every so often
i would check #6 cyl. spark plug after driveing around a while if it looks new, ie no deposits on it then an injector would be what i would change next

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1 Answer

Started Idealing rough all at once. It acts like the spark plugs my need to be changed?


Sometimes this happens when a spark plug wire goes bad or works loose. Check that all the spark plug wire connections are secure (both ends). To zero in on a possible problem cylinder, with the engine running, go around the spark plug wires and pull/disconnect each one in turn, then push it back in place. If you find one that does not make a difference to the running of the engine when you pull it, you will know that either the wire or the plug on that cylinder is bad. CAUTION: Be very careful when you handle the spark plug wires with the engine running. To avoid electric shock, do not touch the area of the lead.

You can also remove each spark plug and inspect it. If you see signs of erosion or deposits you would be due for new spark plugs. However this is something that happens gradually over time, and what you described seems more like a sudden onset.

Sometimes when you get a rough idle the check engine light will come on. Reading the error code may tell you if there is a cylinder misfire or another problem. Stores like Autozone offer free code reading.

"Rough idle" can be due to any number of other causes, problems with sensors, problems with the ignitions system, fuel supply, and so on. If you can't get to the bottom of the problem with some simple diagnostics, it may be necessary to have someone with more diagnostic experience and tools take a look at the car.

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1999 mitsubushi eclipse shows p1390 engine code


have you had a recent timming belt if so get it re timmed

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I HAVE A 2001 DODGE STRATUS AND THESE TWO CODES ARE SHOWING UP ON THE DASH BOARD. P0601 AND P1684. CAN YOU TELL ME WHAT THEY ARE AND HOW TO FIX THEM?


P0601 Internal Control Module Memory Check Sum Error P0684 Glow Plug Control Module to PCM Communication Circuit Range/Performance

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2005 Mazda 3 idles rough at stop light and sometimes dies


The ignition coil should be fine at that mileage. If spark plugs do not fix it suspect a faulty MAF sensor. If the MAF is sending a bad signal it will affect with the idle as the ecu is trying to compensate for the MAF.

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