My 1996 sentra is bucking and kicking while driving and dies when idling at lights. I have replaced air, fuel filters as well as wire and plugs. Check engine light does not come on. Fuel economy goes from 32 mpg to approx 20! This happens every few thousand miles and then just stops! Is this possibly the idle control sensor, fual map sensor, mass air flow sensor, or the entire electronic coil system?

SOURCE: i have a nissan axxes 1991 the idle is not stable

Have a fuel pressure test done, that will show a weak fuel pump, or bad fuel pressue regulator, also have the throttle position sensor checked.
Could be the idle air control valve,
could be the fuel bypass valve.
Without checking and testing, it's hard to pin point the problem.

Mike Butler

• 6674 Answers
• Posted on Apr 17, 2010

SOURCE: check engine light is on, mpg seems to have

Stop at one of the big autoparts stores and they will scan it for free, and that should point you in right direction of what is needed to repair it. If not, get back to us with those codes and we will gladly assist you further. It's faster and cheaper to do it that way, than to guess at it.

Testimonial: "thank you great place to start. did not know they could do this."

SOURCE: replaced mass air flow sensor, fuel filter, air

check timing make sure it;s ok . second check your exhaust system if it;s close , start accilerate for 3 min. then look all exhaust pipe (silencer) if there is difrent coler . check Oxgen sensor it;s ok .
and if you have no enough fuel presure try close the return line temporary . maf, sensor only when there it is highand low accilerator.

SOURCE: car stalled and will not restart

It is possible to have fuel pressure and have injectors that are completely closed. There are light testers that plug into the injector harness to check the pulse to open an injector. Available at autoparts with Tool loaner program.

Try starting fluid to see if it wants to run, If it does, then injectors are not opening, then find cause like camshaft sensor. At that point, like other Expert said, it could be Vacuum leak.

Will not turn over can mean several things. Is it cranking? Is it engaging and not moving the engine? If the starter is not moving then you have to go through the interlocks with brake pedal and shifter. But these work after the engine runs and would not cause it to stall.

Try the starting fluid and see if the spark is working, then shift to fuel delivery if it tries to start.

SOURCE: 2001 Nissan Sentra 2.0, replaced MAF, started idling erraticly. Finally died while driving. Turns over but won't start. Any suggestions? No check engine light was on and you can hear the buzz from

replace ur crank/cam sensors. without a proper signal form those ur car will turn over forever without starting.