I read that the coolant sensor is the one that dictates what the computer tells the engine how to operate .with everyone saying they changed this sensor that sensor and that to no avail.

 

When i start the xj in the morning i hear the pump hiss for a second then crankit about 6-7 seconds then it starts. I drive kids to school under no heavy load its ok maybe a slight hesitation not bad. When i turn xj off then start again no wait starts right up . When i let it sit for more than 5 minutes it doesnt start up right away 6-7 seconds when it starts bad idling cant even pull out of first gear. I need to feather the pedal until in cathes sort of.ive changed my plugs cap rotor cps fuel filter not done coolant temp.map,tps,02. Ive read everyone has done all those changes but not solved.going uphill it stutters pops same when i mash the pedal? Losing mind over it.

 

I'd be checking the fuel pressure before changing any more sensors.

 

cruiser54, sent you a pm. thanks.

 

i suspect when not under load meaning nuetral it can run all day without moving as soon as i drive woop woop stuttering miss hesitate call it watevers.i can sit nuetral a rev it up no miss?i know ishould test fuel pressure i did not yet i wont go get any sensors either so many sensors no change.what sensors measure the load to send more fuel air again? i was thinking change all sensors a it ok right.in the haynes manual its writtin when cahnging the sensors it does not cure the problem.wtf.?you can read that in the section thst shows codes.

 

Check the fuel pressure before proceeding. The demand for fuel is much greater under a load than when in neutral just revving.

 

so i stated that 2.5l been hesitating did this and that.today almost a week later changed fuel press. regulator still hesitate under load.about the same to crank.cleaned throttle body iac inside iac housing...hesitates still....so i changed ignition coil did a seafoam bottle ooohhh high hopes right.. no smoke? ran worse could not even go 10mph i thought seafoam either sucks or that is what is going into injectors and cleaning them?it really was bad sputt putt putt you know.got home let it sit foar awhile. got back in and jus was reving in driveway no tach but guessing @3-4 or 5000 rpms saw some smoking not much but i saw it drove it 50 yards or so if im really light on throttle advance got there ok but slow on the way back tried giving it quiker acceration stutters @ 25-30mph huh....getting dark give it a rest ok.....couple hours past its now 8:30pm i go outside start it sit in it rev it up..i decide to go around the block ever so lightly on throttle wow no hesitation each time im pick up more throttle still no hesitation i decide to go on the main road i am just waiting for it to act up i dont belive it no hesitation im going to go out and see what happens now... i dont want to believe it yet...but a engine that has lots of miles need to be cleaned internally ive read and learned so much in these forums.. just wanted to share this one will post what happens next.fyi it been raining non stop here for days i wanna go wheeling

 

Seafoam in the fuel?

 

so i went ahead and changed fuel pump with a napa carter pump and its fine for now so after a needed tuneup and some sensors replaced i hope to have the pearl sailing for a while again...happy trails and make some waves when your wheelin. Aloha for now.thanks for the help everyone who responded.

 

Glad to hear it's fixed.

 

x2