I was told I was on the wrong forum for EXPERTISE so I'm here... HELLO!

[virginia cambio]

My 4200 CC I have to wait up to 30 min at times for it to start. Mind you this happens when I am leaving the grocery store, mall etc... It has gotten so bad that the motor will cut off while ideling or at low rpm's (like going over a speed bump). I have taken it to numerous mechanics (dealership and independent specialist) and they have not been able to disgnose the problem. I put in a new F1 pump relay and no change. It's generating no codes nor will it replicate at the dealers... I'm lost. Last night I left and drove a mile down the street to pick someone up. While waiting maybe 5/6 mins the car went into neutral and cut off. Wouldn't restart for 20 mins. After priming it 5/6 times it started on the next start. I hated to prime.It has been to the dealer two times. 2 mos and 3 weeks. They can't get it to duplicate. It conked out last night after a ten min drive across town and as I came to a stop it stalled out. I'm soooo frustrated at this point. Happens hot or cold

 

[hodroyd]

Hi,

I'm not an expert, but if you have changed things and it does not develop any fault codes, the dealer does not know what it is, I would be tempted to borrow such as an Engine ECU, fit it and see what result you get. It is also possible it could be the Engine anti-theft device - immobiliser - that keeps cutting in and out at will.
Sorry can't be more help, process of elimination. Good Luck

 

[rotorheadcase]

Is the car maintaining stable idle revs or hunting? It could be the Mass Air Flow Meter or Lambda probes or even signs of a failing cat converter causing incorrect fuelling.

Are you getting normal power when driving or does it seem down on power? Is it cutting out when coasting at high speed ( with no throttle applied but at higher speed and higher gear) or is it only happening when at low speed (when the car is in a low gear or idle)? Answers to these will give more of indication whether it's a transmission or fuel issue.

Regards,

Neil