Car sometimes quits while driving and hard to start after it does. No service engine light shows and nothing stored in computer codes.

disconect battirey for ten min then when you drive it try getting on freeway for ten miles min so computer came reset it self

Take it to a local Autozone or other chain parts store and have the codes read that are stored in the engine control computer when the malfunction indicator is turned on

Could be fuel problem, electrical problem or cooling system problem. 1st thing you should do is get the trouble code from the computer. Most Auto Parts stores can retrieve the code for you. Troubleshooting is easier with a direction to go in.

A lot of times a bunch of Codes may come up and cover a lot of areas. It may be one of these Codes, it may not. And it may be None at all, and the system just has to be reset to put the light out.
As far as what the Codes (parts and/or) actually represent, Autozone, etc should have the meter that tells what those Codes are. Or ask the Dealer what the Codes mean, without agreeing that you are going to let them fix it but just trying to get an idea what to expect. Soemtimes they may want to charge you to do something like this, and sometimes you may wan to say goodbye. You may want to buy a Subaru. If you bring your car in to one of their dealers, whether you bought it there or not, they will take some info from you to get you into their system, bring the car in, put in on meters or whatever, tell you what might be going on, and not charge you anything whether or not you decide to get it taken care of there.
My Father owned a hunk of junk 1983 Buick Regal and every time I drove it the "Service Engine" lights came on. There was nothing wrong with the Car, and the light would eventually go out when my Father started driving it again.
Part of these problems are simply that Computers are machines, do what they are told to do, and only as good as the people setting them up. So, in this case, putting a computer in a Buick that they didn't even know what a "Spring and Suspension Rate" was, is the obvious reason things didn't work right, if at all.

Get the codes read. you will get a better idea of where to start testing to repair this one. Most auto parts stores will do this for little or nothing. Please get back to me and we can trouble shoot this together.

Yes thier both right you just need to show up at any auto parts store and ask them to scan your car. They don't mcharfge for this service as they hope to sell you the parts to fix it with. If the check engine light has been on with the engine running theirs definatly a troble code staored in the computer and I need to know the numbers of these codes and if thier in the system more than once and I need to know if they will clear and then if just running the engine fore a minute they come back or not. Anything can do what you said but the codes will put you in the right direction. Sounds like the coolant temperture senser goes open and the computer ( thinks) the engine is cold and throws lots of fuel and then it comes back on and the car straightens back up. The senser code will be th=in the computer if the senser or it's wiring are bad.

Hi

if the pump is not kicking in then it is one of 3 things either the fuel relay is faulty and these do not always show a code, an immobilizer fault again sometimes wont show a code but often will if the system is factory fitted. and finally fuel pump failure. I know that these cars have major issues with fuel tanks they rot very quickly and can cause a multitude of problems in the fuel system such as rust damaging the fuel pump etc.

If you need more info get back to me.
Regards
Dan

i hope this is under warranty, they must of tried a reprogram on the computer and that didnt help, i would get something in writing of this problemjust for your protection in the future,this is hard to say whats wrong without knowing the engine codes that the computer stored when the lights were turned on, when ever the computer or computers see a problem it turns the light on for that system to warn you and then stores a code that the shop gets with a scan tool, the codes will tell them what has failed and from there they do some testing and repair, now this testing sometimes is not so easy to check, there are so many components and sensors that can cause a problem that some times it takes a few tries but again without knowing exactly whats wrong its hard to say, the only thing is that you dont end up paying for the same repair again, good luck.

fluid levels can be fine however does not mean pressures like Oil pressure is okay.. is it the check engine light or service engine soon light you did not specify... if it is the check engine light you will need to have a diagnostic code reader to search and read any stored emmission trouble codes... you can have a tech scan it for you or you can buy a realtively inexpensive code reader at any discount autoparts store like Kragens or Autozone... please rate my help, thanks

Most onboard computers store error codes so even if the light is not on a scan should show what error is causing the light.
Get it scanned and take it from there , It's the best option and it will give you piece of mind.
Some car part stores Scan for free or a small very charge.
Hope this helps