n2deep
Active Member
Ok just wanted to send an update after we fixed the issue with our 2004 Cadillac xlr.
at 1st the car just died in the middle of an intersection no warning at all just died. called for a wrecker , it came, when they went load it up the car...it started again. drove it home, to town, and to a restaurant later that evening was fine. next day no start. this went on for several weeks until we just were to scared to drive it anywhere.
went onto several forums trying to find anything remotely close to the problems we were having yet we saw a lot of but no-one coming back telling the fix. or if they did get it fixed. soooo after 3 months of home work and 12 hours of mechanicing <----(not a word I know). I found the issue and hope this helps some of you guys.
1st I tried to crank the car everyday for the 3 months it sat would crank 50% of the time checked fuel rails no pressure at all faulty fuel pump rite ??? well purchased a fuel pump online got the bosch pump because of reviews and set out for the removing exhaust and shifter linkage . there is a tutorial of a 2005 corvette on youtube guy replaces his that is spot on the xlr if your going to try it yourself. its very tedious. we dropped the tank installed new pump put back press start and nothing (which im so glad it did not start ). had it would have started would have given the flase sense that it was fixed and have the same problem again.
dropped tank again checked the fuel pump wiring harness reads 11.87 volts grey wire+ black wire- when under a load crank dropped to 9.1 volts then read the pos grey wire under load different ground no drop in voltage under load was 11.87 volts started tracing wires was a bad ground in one of the harness instead of fixing that ground I made my own and dropped the factory ground now fires rite up every time. so check your wiring harness before you replace the fuel pump this is just f.y.I. im seeing a lot of people with this issue not reporting back a fix to help other xlr-ers.
at 1st the car just died in the middle of an intersection no warning at all just died. called for a wrecker , it came, when they went load it up the car...it started again. drove it home, to town, and to a restaurant later that evening was fine. next day no start. this went on for several weeks until we just were to scared to drive it anywhere.
went onto several forums trying to find anything remotely close to the problems we were having yet we saw a lot of but no-one coming back telling the fix. or if they did get it fixed. soooo after 3 months of home work and 12 hours of mechanicing <----(not a word I know). I found the issue and hope this helps some of you guys.
1st I tried to crank the car everyday for the 3 months it sat would crank 50% of the time checked fuel rails no pressure at all faulty fuel pump rite ??? well purchased a fuel pump online got the bosch pump because of reviews and set out for the removing exhaust and shifter linkage . there is a tutorial of a 2005 corvette on youtube guy replaces his that is spot on the xlr if your going to try it yourself. its very tedious. we dropped the tank installed new pump put back press start and nothing (which im so glad it did not start ). had it would have started would have given the flase sense that it was fixed and have the same problem again.
dropped tank again checked the fuel pump wiring harness reads 11.87 volts grey wire+ black wire- when under a load crank dropped to 9.1 volts then read the pos grey wire under load different ground no drop in voltage under load was 11.87 volts started tracing wires was a bad ground in one of the harness instead of fixing that ground I made my own and dropped the factory ground now fires rite up every time. so check your wiring harness before you replace the fuel pump this is just f.y.I. im seeing a lot of people with this issue not reporting back a fix to help other xlr-ers.
