Random Stalling

[cmoore]

Well, I have been searching for about an hour on the forum trying to figure this one. The car has been running flawlessly up until yesterday. When I am coming to a stop (around 5-10mph) and then stopped the car will stumble with all electrical cutting out...most times it bounces right back but every now and then it will simply stall and cannot be restarted unless it sits for a while...totally puzzeled on this one. Just today, I was pulling into a drive way (thank goodness) and the car just died, everything, key in on positions but all electrical, all everything, dead.

Recently replaced:

Cam Sensor, about six months ago
Back bank of coils, two weeks ago

I have a continuous code in the computer about my EVAC system, but that has been on for over 8 months...
I am going to have the battery tested and also check to see if the ground wire on the rear post of the intake mount is connected correctly...any other suggestions...I thought about fuel pump however, with all electrical cutting out I highly doubt it...

One more thing, this morning, I went to start it, turned the key to on to let the fuel pump run and then went to start and nothing happened. The fuel pump ran but all electrical cut out the second I went to the start position. I eventually moved the gear selector to nuetral, for some odd reason, and it started??

HELP!!!

 

[cmoore]

One other thing, I did pull my K&N out to clean it and all this has happened since it was pulled out...I have only driven it a little bit, could this be related??

 

[JSIL1]

filter oil on the MAF?

 

[PFA]

I wouldn't think that the MAF would **** everything. I might say the switch that shows it in park...at least for the last part you said. I'd say you are shorting a wire out. This is taking everything down.

 

[jedhead]

Make sure the battery, starter and alternator cables are all tight. Make sure the battery posts are clean and free of corosion.

Bob

 

[Ian Macoomb]

Sounds like you've still got a bad coil. A weak battery can also cause funny issues with the car.

 

[cmoore]

Well, all wires are tight and the alternator tested good (phew!!)...the battery tested lower but was not bad...Autozone guys says its on its way out...I really am beginning to believe that it has something to do with the nuetral safety switch or something...this afternoon...it happened again, slid gear selector around for a bit and it started right up...I don't know, could really use some more input if anyone has it.

Also, I know the coils are good....I have replaced six of eight and have become pretty familiar with the feel the car has with a miss...Also, the filter has not been put back in just yet...so the car is without a filter so I know it is not oil on the MAF...hopefully this will help us all diagnos this...

Thanks for all the help!

 

[YZFan]

Well, all wires are tight and the alternator tested good (phew!!)...the battery tested lower but was not bad...Autozone guys says its on its way out...I really am beginning to believe that it has something to do with the nuetral safety switch or something...this afternoon...it happened again, slid gear selector around for a bit and it started right up...I don't know, could really use some more input if anyone has it.

Also, I know the coils are good....I have replaced six of eight and have become pretty familiar with the feel the car has with a miss...Also, the filter has not been put back in just yet...so the car is without a filter so I know it is not oil on the MAF...hopefully this will help us all diagnos this...

Thanks for all the help!

Ok dont mess with the shifter when this happens just cycle the key off then on. If it starts after that it is a coil problem I just killed myself for a month tring to find this problem. The car didnt missfire just died. Started replacing coils until the problem went away. What happens is the coil shorts out the voltage to the pcm and it freaks out. You can watch this happen with datalogger the B+ voltage will read funny and the hego's freeze lean. most of the time. If it is the coils this problem will get worse with heat and time. As far as the nuetral safety switch it never caused mine to die just strange electical problems.(i.e. radio cutting out, wipers, climate control) Hope this helps good luck

 

[Muck]

intermittent no start

The fact that you've stated that moving the shifter from Park to Neutral sometimes does the trick, has me suspicious of the Selection switch, the one right on top of the transaxle where the manual lever shaft goes in to the case. I believe this is called the "mlps" (Manual Lever Position Sensor). Hope this is of some help. Chuck

 

[PFA]

The fact that you've stated that moving the shifter from Park to Neutral sometimes does the trick, has me suspicious of the Selection switch, the one right on top of the transaxle where the manual lever shaft goes in to the case. I believe this is called the "mlps" (Manual Lever Position Sensor). Hope this is of some help. Chuck

This sounds like it may be it to me too. The mlps is sometimes called the neutral safety switch. Either way, it lets the computer know where the shifter is. Good luck