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As the title says, 1998 Wrangler TJ 4.0 with manual transmission running cold in winter weather. Located in Watertown, NY this past week outside temperatures have been about 15 degrees F all week. TJ refuses to get up to normal operating temp and will just sit around 140, about halfway between...

thank you both for the reply. Is 40-42 psi showing an issue which i should be concerned with immediately though? or is there some life left in the pump that i can squeeze out before she dies completely?

thank you for the reply. should i be looking to replace the entire assembly or just the pump? if replacing the entire assembly what is my best option? im seeing some stuff about delphi 1353, but more on what brands not to buy then with what to actually go with. Should I just replace the pump...

ran another series of tests today, when primed the fuel pump will pressurize the rail to 30 psi no matter how many times the key is shut on then off. When started today the Jeep held pressure at 42 while running and when rev'd would dip just below 40 psi and jump right back up to 42. When...

ran another series of tests today, when primed the fuel pump will pressurize the rail to 30 psi no matter how many times the key is shut on then off. When started today the Jeep held pressure at 42 while running and when rev'd would dip just below 40 psi and jump right back up to 42. When...

1998, TJ, 4.0, 5spd. Have had some stumbling issues while driving recently, and have always had the long start issue, but always when hot. Always starts on first crank in the morning. bought a pressure tester and showed 40-42 psi while running hooked up to the serader valve. When rev'd psi...

did you ever figure this problem out? having pretty much the same issue and im unsure about whether or not its a leaky injector or a check valve

****Started this post on some other forums and haven't gotten much feedback, hoping this site will provide me with some answers***** First let me apologize for another starting issue thread. However, I am looking to confirm that my suspicions of a bad fuel pump are the problem before I tackle...