When warmed up while driving it stalls for a second then takes off again

i'm having an issue with my car and a few people have told me that it's the fuel pump. it acts like it's running out of gas and when i stop at red lights and such it acts like it wants to stall, sometimes it does. when i step on the gas from a stop, sometimes it acts like it's not getting any gas so i have to feather the gas pedal to get it to go. now it will only start for a few seconds and cut out. i've also read that it could be the fuse or a relay??? please help!!

Welcome to the forum, how long since a tune-up? Use a gage and check fuel pressure. Some of the national brand autostores used to loan out a fuel pressure gage. You can call and ask. You may need to clean the throttle-body and check throttle-body sensors, tps and iac.

i have a 99 poniac grand prix 3.8 engine and it just shuts off on me when i drive it i let it sit for 30 minutes and it starts rite back up i changed the battery tested the altinator and it still just shut off when i drive what could be the problem????

Do you have any codes in the computer?If you haven't checked yet that is the first thing i would do most auto parts stores will check for free if you don't live in california.Next time it dies and won't start check for spark let me know if you have any.They sell spark testers pretty cheap at the auto parts store.

yes I did the code read that it was a crank shaft position censor but Icalled a part store and they said it also could be the control module I'm lost cuz I dnt wanna get the parts and it repeats the problem over.

I need the exact code number not the code description and i will help you figure it out.

When I hooked the scanner up to the car it says no DTC,s or freeze frame data presently stored in the vehicles computer

So you don't remember the code you had before?If your getting a crankshaft position sensor code then i would suspect you could have a bad sensor.DO you have a multimeter to do some testing?

No I dnt do you think that it could be the system module or the egnition coil that makes the car just shut off like that??

I have a grand prix and when i put it in park,

it IDLES up and down until the engine cuts off.

It starts back up but it does that all the time now.

HAs the check engine light come on? Chances are it is the idle air control valve. the throttle position sensor, or a vacuum leak. However, I can't be sure without a code from the computer. Have you checked for vacuum leaks?

Most likely i think its the sensor if you can get a meter we can do some testing instead of expensive guessing.Meters are cheap.

code P0135 comes on...

What kind of meter??

PO135 = Oxygen Sensor Heater Circuit Malfunction (Bank 1 Sensor 1) It sounds like an O2 sensor (heated). Here are some pictures of where bank 1 for the optional engines.

The 3.1L V6 is different:

Remember, bank 1 is the side of the engine with the number 1 cylender. Also, sensor 1 is before the converter. Let me know if this helps. Joe

A multimeter that reads voltage ohms etc.

Engine Mechanical problem
1999 Pontiac Grand Prix 78,000 miles

My car stalled and died when driving down the road. When try to restart it will start idle rough for couple seconds and die again can hear the fuel pump running when turn the key to the on position and put new fuel filter on the car as well. Car still will not stay started is it the Fuel pump

Have the fuel pressure tested with a mechanical gauge, if above 40psi, then the FP is not the problem.
It could be a bad coil pack or ignition module.

I, too, had a problem similar to yours. I tested my fuel pressures, tried to retrieve any codes, etc., changed fuel filter, disconnected battery for a while...everything seemed normal. I had a friend who had a fuel injector test kit. I unplugged one of the wire connectors on the injector and plugged the test light in. When my wife cranked the car over it started. We shut it off, hooked up the connector to the injector again, started it up and it's been running great for the last 80k miles...go figure...

99 grand prix makes clanking noise when turning right
only. stops if you shut off engine wile turning.

Check the CV axle boots for rips/tears.

If OK, then check motor mounts/brakes and look for any loose shields under car.

maybe motor mount because noise stops when i cut the engine.

Could also be a tensioner assy, loose pulley.

thanks for pulley suggestion..turned out to be a/c
pulley

Good news! Thanks for using 2carpros.

Bought car at auction had to get code key made do the thirty minute program. car started but wanted to die. i left jump pack on it to drive home it ran fine. now first start of day it starts fine put in gear it moves, but after sixty seconds I hear it is drain/drop in power and idle and dies. go to restart it and wont unless I work pedal after a few it will at times idle on own, but surges or dies. using two feet wont even help when it is put into gear dies no matter what. what the issue the coded key and anti theft?

the key has to be coded to the car the only way to code a new key is if you have an original one.

I recently purchased my GTP and fell in love with it, however the car got to a point where it would hardly drag itself into the drive (no exaggertain) I took it to a local shop and they did a complete tune up of the car. The thing ran great after that. Recently I noticed that the car with cut out when going up a hill but then be just fine when either A.) I gave it more gas or B.) it was done going up the hill.

Well the other day I go into that gas station and left the car running, when I came back out the car was barely running and it was spitting and sputtering then it died. It would start back up then die again, it took 20min to home when I live just 3 blocks away. I have gone back out to start it and it fires right up but when I go to give it gas it cuts out again, doesnt die just cuts out. What could be wrong with this thing????

is the check engine light on??

have the fuel pressure checked while the situation happens.

check for spark

Roy

What would cause my 99 Grand Prix GT to completly die while I'm driving? It does not matter if I'm driving 30 mph or 80 mph. I have to pull off the road and turn car off and wait a few minuets. It will then start back up and either stay running or it will start and then as soon as I put it into drive it dies again. Please HELP!!

Have ignition module tested, if PCM does not get an ignition reference, it will shut off fuel.

my car stalls out at stop and starts right back up and is fine..and has all its power..replace IAC and cam postion sensor and does it more when it is hot..and after getting gas and it sometimes idles up and down and than dies.

clean throttle plate on both sides with choke cleaner and iac hole. also check for a vacuum leak, like holses in hoses/lines off etc.

What makes a battery light come n then the car dies not won't start back up I have fuel n spark

Usually a bad alternator. However, if you can, take the car to a parts store and have them load test the battery as well as check the alt for output. Most will do it for free and then you will know where the problem is.