About two weeks ago, my 99 Boxster’s engine just died while driving. I was fortunate enough to be approaching my house and was able to coast the vehicle to my driveway.

The engine would turn but not start and there were no fault codes and I deduced that the fuel pump relay probably went bad. Sure enough, I purchased an OEM fuel pump relay and installed it and the engine started up again with no problem.

I’ve been driving the car with no problem now for two weeks now when again I was left stranded in a parking lot. The engine would crank and not start and it’s fuel pump relay that has gone bad again.

Soooo, my guess is that there’s something going on elsewhere in the electrical system that may be overloading or shorting out the fuel pump relay.

Any ideas or suggestions on what might be causing this issue?

Truly appreciate your assistance and sage advice!

Fred

 

bad fuel pump or wiring or a combination.

 

ok, thank you. I wasnt suspecting the fuel pump as it's not being noisy or making any clicking sounds (typical of a fuel pump that's about to go belly up).

If it's a wiring issue, I'm not sure where to start.

 

start at the pump when you go to replace it. Check the voltage at the 12v power source and compare that to the voltage on the output pin on the fuel pump relay. If voltage at pump is significantly lower then start working your way back looking for a pinched or green death wire. Also check ground integrity maybe just as good pm clean the fuel pump ground retighten and coat in dielectric grease to prevent corrosion.

 

thank you, for the great suggestion and advice!