1991 chevy Lumina,3.1.Starts from cold,runs until it warms up then dies.What do you think might be the problem

Question

When it cools for about 20 minutes,it will start run and die as soon as it heats back up.I noticed coolant lines that run to the throttle body.Could the attached sensors be weak and failing because of heat?There are two.One flat and one round,I dont know their names or what they do.Any help appriciated.
Thanks

Answer 1

Could also be bad ignition coils and module---very susceptible to heat related problems---work fine cold and don't when warm. My 93 Grand Prix 3.1 had a similiar problem...best to replace them as a set as one going bad will put a strain on the others. Any problem with computer sensors or components should set off the check engine light whereas the coils/module would not.
http://www.batauto.com/ has a drop down menu on the right side of the page for trouble codes and how to get them.

Answer 2

the first thought that came to my mind upon reading this post was 1. WHY is college tuition fee is America ridiculously expensive? WHY do colleges need so much money? A college is NOT a company like Apple or Microsoft. My sister will graduate from her 4 years of university soon and the total coast of tuition pee paid during those 4 years....is OMG too much. the amount is almost as much as the U.S. national debt. 2. do colleges REALLY need a lot of money? 3. America is currently facing an economic crisis; it is predicted to be one of the worst ever in U.S. history. So unemployment is a rising issue, the economy is getting spoiled and there are more innocent citizens suffering beneath the poverty line. And i am NOT against the government but the federal government doesn't seem to be sorting it out well. I don't know that much about the ecnonomy, so I learned from my sister (she's a business / economics major) and i can tell that the nation, the economy and so on are all facing a crisis. Soo....i don't know but unless the government promises to like help the poor pay for college or something I strongly suggest that colleges DO NOT raise tuition fees. Otherwise...America will face an even worse educational crisis. Does the stuff I typed make sense? hope it does. And......the good news is that the expensive tuition fee paid to a great college was actually worth it since my sister got a great job 2 weeks before graduation.

Answer 3

I really wouldn't invest in a maf sensor until I was sure it was the problem. I don't know of any coolant lines to the throttle body. Do you have throttle body injector or injector for each cylinder. I would look closely at the idle air control (iac) and the throttle position sensor (tps) both located at the throttle body.

Answer 4

You need to have the idle relearned. The early models you had to when the battery went dead or was disconnected. You can have it relearned at most shops that have the scan tool or you could drive it at a steady speed on highwayfor about 20-30min and it'll relearn itself.

Answer 5

check ur timming referance sensor its may be cracked i had that problem with one customer who had spent lots of money and about 5 different garages he changed his coil pack and almost every sensor in the car two ways to test them my favorite way is to use freeze spray on it when the car dies spray it and see if it will start and run if it runs theres ur problem hope this helps and good luck other way is with a multi meter

Answer 6

i think you need to get a mass air flow sensor sounds like it