My 1999 911 Gas Pedal Cuts out after a few Hours of Driving...Why?

[jrbodyluck]

After I drive for a few hours, my car cuts out and I'm forced to push the gas pedal a few times to get it running again.

I see no codes on my car, my car runs at normal temp. and it's a 6 speed manual trans.

Does anyone have any idea what's happening.

[DBJoe996]

Not really enough information.  How does it "cut out?"  While driving or at idle?  Is your car (most 99's are) drive by wire or e-gas?  Meaning, is there a throttle cable attached to the throttle body?  Places to start: clean your throttle body; clean the ICV; what maintenance have you done?; any other symptoms?; how many miles, i.e., maybe your fuel filter needs to be replaced?

[jrbodyluck]

My car "cuts out" while driving at speed along the Interstate.(70 MPH)

I push the gas pedal 3 or 4 times quickly and it engages back into gear to keep going.

I haven't done any maintenance since I bought it a year ago.

It happens intermittently and I never know when it's going to happen.

My car has 117,000 miles. It has no other symptoms.

I appreciate your help. Any other ideas what's happening.

Thank you.

 

[DBJoe996]

Well, let's keep this very simple.  There are three things needed to make an engine run: fuel, spark and air.  I think your symptoms point to a problem with fuel delivery.  An intermittent unpredictable event like this is difficult to diagnose. I would start with removing and totally cleaning the throttle body, passage ways, butterfly and valves.  It would not hurt to clean the MAF sensor at the same time since the airbox is out.  And replace the air filter while in there.  This could be as simple as a sticking butterfly valve in the throttle body.  The point is you are going to have to do something to begin a process of elimination.