Join Date: Apr 2002
Location: Houston (Clearlake), TX
A bad fuel pump is possible, but there are many things on the CIS system that could cause this. I wouldn't replace parts until a fuel check is done. Some checks are: fuel flow (volume per time), unregulated fuel pressure, cold fuel pressure, and hot fuel pressure. Fuel flow can be checked with a measuring cup and the pressures are checked with a CIS gauge set.
2014 Cayman S
2011 Cayenne Turbo
1979 930 (475 rwhp at 0.95 bar)