MY nissan sentra spudders when cold. when i start it in the morning it revs up by itself. nisson is thinking it could be the timing chain, i have looked up the symptoms to this and dont think it is that. i have had the camshaft sensor replaced twice. i have so far spent 300. on this car and am still having the problem. nissan was not much help. car runs fine after it is warmed up. it started last summer when it rained it would spudder and then run fine...please help me i am at a loss... why would i spend 1100 on a timing chain when they are only thinking thats the problem?? please help

Marvin

• 85242 Answers
• Posted on Nov 03, 2008

SOURCE: 1998 Nissan Maxima

You may have a problem with the check valve in the fuel pump, if this valve is defective the gas drains back to the fuel tank and causes long crank times, you can test this by hooking up a fuel pressure guage at the fuel injector fuel supply line on the top of the engine, run the engine for a moment and quickly record the pressure when you shut down, that pressure reading should not drop more than 5 PSI overnight, if the check valve is bad the pressure will most likely start to drop right away, but do the over night test anyway. If this is the problem you will need to replace the fuel pump in the gas tank.

Jackson Hisey

• 99 Answers
• Posted on Nov 29, 2008

SOURCE: 2000 maxima won't stay started on a cold morning

Have the plastic intake manifold and gasket replaced. I have posted this fixed at least once before and have seen it numerous times.

SOURCE: 2005 Nisson Sentra has trouble starting when warmed up

are you getting a spark on your spark plug????/

SOURCE: 2005 Audi 1.8 a4 check engine light on and car now spudders??

FYI also when you get those codes you can look them up and get their description at http://www.check-engine-light.com

SOURCE: 01 lincoln ls still spuddering

Most likely caused by a failing coil pack. The dealer can do what is called a stress test on them to see if they are bad or not but this is pretty labor and time extensive because they have to be removed one at a time to test them. If you have access to a scan tool that will read mode 6 data it may show which cylinders are showing some miss fires and you can try and just replace the ones that show a miss fire and see if that works.