Question about Cars & Trucks
This is most likely a vacuum leak. Check all the hoses and connections. Make sure there are no splits on the ends of the hoses. If there are no bad hoses or missed connections, take wd40 and spray around the entire gasket area on the intake when the engine is running. If it starts to smooth out, you have found the leak.
Posted on May 15, 2014
Did you change to an oiled gauze style filter also? If so sometimes they get hot and oily residue from the filter gets sucked in and can foul out sensors in throttle body tricking the computer into running the engine differently. Try taking off the filter and cleaning throttle body w/carb and choke cleaner. If it runs better you found your problem. Manly manufacturers are suggesting against the use of oiled gauze filters these days for this reason.
Posted on May 17, 2014
That can often be a sign of a vacuum leak. Sometimes you can hear a leak by holding a 1/4 inch hose to your ear and running it all around the edge of the manifold while idling.
Another test is even better but you have to be careful of fire. Put solvent or regular paint thinner in an oil can and carefully squirt it around all sealing edges on the manifold while idling. If there is a vacuum leak it will suck in the solvent and the you will hear the idle speed change. Do this before the engine gets to hot to reduce the chance of fumes and a fire.
Posted on May 15, 2014
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Posted on Jan 02, 2017
Idling problems may be cause buy a number of issues. You may check out the fast idle control valve and PCV if they would need cleaning. You can check out the timing it may be advanced, that is why you feel that the car runs hard.
Posted on Jun 13, 2009
Have you changed all the plugs to platinum and wires? My xterra was doing that and I changed all of them and now it runs great. Also, I changed the distribitor cap and rotor button.
Posted on Jul 20, 2009
How many miles, and have you had the fuel filter changed at all?
It could also be an O2 sensor. Try removing them. Tip should be a gray/tan color. If its green you have a blown head gasket.
Posted on Sep 12, 2009
Testimonial: "thanx 4 the help i change the fuel filter and car runs much better now but code remain the same but idleling is80% better now.God bless u. "
SOURCE: Code P0601 car idle and
Hi, basically that means that there is an interal fault in the Powertrain Control Module (PCM). There have been many reported PCM failures on Chrysler/Dodge products although it is possible for this to happen on any vehicle. In Dodge/Chrysler products, a P0601 trouble code means that a serial communication failed inside the computer at least 6 times. In most cases means the PCM has gone bad. This is possibly due to a short-circuit inside the PCM. Or, if you disconnect the wires/connector from the PCM while the battery is still connected, that may also cause this code. The most common fix is to replace and reprogram the PCM. In a few cases the dealer may be able to reflash the PCM and get it working. But more than likely the PCM will need to be replaced and reprogrammed (we recommend you take it to a dealership for this). The good news is it *may* be covered under your emmissions warranty. So even if you're out of bumper-to-bumper warranty or powertrain warranty, check your warranty guide or dealer to see if this is covered.
Posted on May 26, 2011
Could be a problem with ECT (Engine Coolant Temperature) sensor or fuel injection system. Will need to test and check in order to discard.
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Posted on Feb 16, 2012
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