I was getting on the interstate to head to work and when I got up to about 70mph the car just died like it went into limp mode. I was able to pull over to the side of the road. I let the car sit for a few minutes and tried to crank it back up. It turnsover and then it just rumbles and then dies.

I am going to say it is the fuel pump, but wanted to get some of your guys opinions on the matter.
The car is basically stock, except for exhaust and intake, nothing else.

 

Anybody??

Update- the car now starts, but when you try and let it idle it has a rough idle then dies. If you give it gas then it seems to run normally but if you let go back to idle its rough and then dies.

 

throttle body maybe?

 

Did it throw a code ? Is the fuel pump coming on, what is the fuel pressure.

 

No one here has a magic ball. We need to know the basic checks.

 

Has a fairly new throttle body that was installed by the dealership maybe 8k miles ago.
Not throwing any codes.. Don't know what the fuel pressure is but from what I can hear it has pressure.

Not saying anyone has the answer, just wanted to get peoples opinions on the matter, if anyone has encountered this before.

 

Update: So I replaced the spark plugs and the old spark plugs were pretty worn down, but nothing shocking. I checked for a CEL and I got two codes P0305 and P0305pd, which is a Cylinder 5 Misfire.. So I guess this means that it can be narrowed down to either a Vacuum leak or possibly a bad coil?

Any input would be appreciated..

 

bad coil would be a good guess. Swap cyl 5 coil to another position and see if it misfires at new location. BINGO.

 

I swapped the coil and I didn't get the code on another cylinder. The car is still starting and then dying when it tries to idle.

Guess its back to the fuel pump or vacuum leak?

 

Research on crankshaft sensor. I had similar problem but not exactly.