Scott Brewer

I was driving about 45 mph and the car just died i coasted into parking lot...tried to restart the car and had no compression..towed it to a repair shop they have wet tested it..leakdown tested..dry compression tested...still have no diegnosis...help

blue-impala

When you say no compression, what exactly are you talking about. The compression in the cylinders ? Is it possible that compression is not the word you are looking for ?. It would be very unlikely that all cylinders would loose compression, it would take a extremely catastrophic failure to loose it all, broken pistons, broken or severely burned valves blown head gasket, non of these events would likely kill all cylinders at once, one or two at the most. You would have had some clue to an issue of this nature before hand, as in smoke, steam, loud knocking noise. Are there any codes stored in the computer ? Just dying while you are driving sounds more like a fuel delivery or electrical/computer issue than a mechanical issue.