Looking for some input that seems to be a bit different from what I have found after searching the forum.
1995 XJ 4.0 with 91,300 miles. Has been getting progressively worse on hard start but it seems to start up just fine when the engine is cold or has sat more than a few hours. Did fuel pressure test a month ago and was showing little to zero bleed down so started with cleaning the IAC valve, noticed it was sticking a bit so replaced it. Still hard start.
Next, moved on to replace the fuel pump. Bought a Bosch 69544 which is the listed part number for a 1995 XJ, but to my surprise when we pulled the fuel sending unit / pump assembly it has a fuel sending unit / pump assembly that matches which I 'think' is from a 1993 XJ as the fuel pump looked more like the Bosch 69302 (which of course seems to be out of stock any place we could find in the next 3 days so went with the Napa / Carter pump for a 1993 XJ and got to work; my best guess is when the previous owner installed a new fuel tank the shop he had do it installed the fuel sending unit and pump assembly which was for a 1993.
So...new IAC valve, new Napa / Carter fuel pump (circa 1993 version) and STILL hard starting. Thus here are the questions I am hoping this group can provide some insight to...
1. Did the factory ever in 1995 use a fuel sending unit and pump assembly which would not allow a direct replacement pump Bosch 69544 to fit?
2. Is there any reason I should now replace the entire fuel sending unit and pump with which I assume is the correct version for a 1995 XJ (one which would allow the use of the Bosch 69544)?
3. Given I am still having hard starting issue, in particular when the engine is a bit warmer is the next step to try installing Bosch 4-hole injectors or is there anything else I should try first?
Thanks for any insight.
1995 XJ 4.0 with 91,300 miles. Has been getting progressively worse on hard start but it seems to start up just fine when the engine is cold or has sat more than a few hours. Did fuel pressure test a month ago and was showing little to zero bleed down so started with cleaning the IAC valve, noticed it was sticking a bit so replaced it. Still hard start.
Next, moved on to replace the fuel pump. Bought a Bosch 69544 which is the listed part number for a 1995 XJ, but to my surprise when we pulled the fuel sending unit / pump assembly it has a fuel sending unit / pump assembly that matches which I 'think' is from a 1993 XJ as the fuel pump looked more like the Bosch 69302 (which of course seems to be out of stock any place we could find in the next 3 days so went with the Napa / Carter pump for a 1993 XJ and got to work; my best guess is when the previous owner installed a new fuel tank the shop he had do it installed the fuel sending unit and pump assembly which was for a 1993.
So...new IAC valve, new Napa / Carter fuel pump (circa 1993 version) and STILL hard starting. Thus here are the questions I am hoping this group can provide some insight to...
1. Did the factory ever in 1995 use a fuel sending unit and pump assembly which would not allow a direct replacement pump Bosch 69544 to fit?
2. Is there any reason I should now replace the entire fuel sending unit and pump with which I assume is the correct version for a 1995 XJ (one which would allow the use of the Bosch 69544)?
3. Given I am still having hard starting issue, in particular when the engine is a bit warmer is the next step to try installing Bosch 4-hole injectors or is there anything else I should try first?
Thanks for any insight.