Panko

Haha now you have me thinking about it. Im sure the ISC was working ok when i tested it ok when i finish my coffee ill go try it haha.

Ok EFi nuts, please help! I have been having an issue with my XF for some time now, but its getting a heck of a lot worse, and I've decided i really need to do something about it. The issue - When the car is coming off cold start, the engine develops a miss, a big miss. when this occurs, it bumps the idle up, but drops 1 cylinder, and runs like a dog on 5 cylinders. which cylinder, i haven't tested yet. its been doing it for probably 18 months now, but the past few months is becoming so much of an issue i can't drive it while this is happening (it stops after a few minutes and runs normal) I think I have put it down to ignition system. trying to fault find, in the last year or so I have replaced injectors (which needed doing anyway) rotor button and distributor cap, ignition module (with a genuine Ford NOS unit), currently have another coil the same as i already had, but less work, temp sensor (the one for the ECU) which helped with cold start in the sense it brings the RPM down over a longer period rather than being on a switch going from high rpm to low rpm, high pressure fuel pump (again was desperately needed) fuel filter. Its not a fuel supply issue, because the fuel pressure is perfectly fine while this is all happening. Its an electronic issue, and i can only think it will be ignition. Later this week i plan to fit new plugs and new coil, but I'm fast running out of ideas as to what it could be Its also developed an issue where it will occasionally just stall, but not cough before dying, just switch off like I have turned the key off. So any ideas would be well considered, because I have no new ideas regarding this problem

Thats what i thought, but unplugging it doesnt appear to make a difference

Dave, I'm not throwing your offer in the bin, because your offer on that engine is tempting. but just not yet, my priority for now is to get the diff built and fitted, because although my engine is tired, the diff is whats making the car a real bitch to drive. i do want to try one more thing tomorrow regarding the engine. I discovered this morning watching closely, the issue with it playing up when its warming up, seems to start the moment the thermostat opens for the first time. the reason i picked this? the temp gauge goes up to normal, then basically as soon as it starts shitting itself, the team gauges drops back down, and the base idle spikes for a couple of minutes until the missing goes away and its all back to normal.

I just re-read that Neo, you would want something with longer life if your doing those kms. If i remember correctly, the continentals had a 60,000km guarentee on them. So for me i should get 2+ years out of them

In that case, i would recommend the Yokohamas. as mentioned above i have them on my XF in a wider size, and been really happy with them, but like i said are beginning to wear out because of age, not use. Or on my other car, I have continentals, ContiContact MC5s, in an 18". So far so good. they are a mix of performance and touring tyre, super grippy, and after about 20,000km, have barely worn. This is my daily, where i do mostly FWY driving, and i average about 25-30,000km a year. so at the 12 month mark it will be to see how they are going.

Performance as in grip? or performance as in life span? Its rare to find a tyre that will do both really well. you need to look at how many kms a year you do? because there is usually a point where the tyres will go hard and be as good, because they have been on the car for longer than it has taken to wear the tread out. Im currently finding this on my XF. I'm running Yokohama C Drive 2s, in 225/60R15,which are a softer, grippier tyre, about over $200 a corner, they have been on there for 3.5 years, and still have a bit tread left on them, but because i dont do a lot of kms in the car, they are going hard, and i feel it when i drive the car, they dont feel as good on the road anymore, even though they have a fair bit of tread left on them, maybe another 10,000km. i guess what I'm getting at is, if your not going to do 80-90,000km in 2-3 years, your going to be wasting your money on tyres with that sort of life spawn.

Yeah Dave im not saying your wrong, but i just figure if it was down to the comp, wouldnt play up all the time? I guess if im going to throw a new engine in it, i might as well limp this one along until i can put my turbo engine together for it. And i have to way up my part of the cost of getting the xe turbo wagon back on the road, as to whether i keep mine n/a and cheaper to put a new engine in, or sell on or strip the xe so i can afford to turbocharge mine.

Well like i said the compression isnt the best, i knew that. But go back to before it started having this miss, ive tested it numerous times before, the compression hasnt changed much at all, if any over the past couple years. I now run a bit thicker oil, which may explain why i was a little surprised at the reading on a couple of the cylinders, which previously i have thought were worse off. I know the engine is tired, but the fact it runs so well after its few minutes of madness, is why im so confused by it.

I dont think compression is the issue.

Well i have another engine, but in bits lol. The other engine was always intended for the turbocharged build, which im certainly not ready to do, with the other turbo wagon build already on the go.

Hmm ok maybe its worth a shot. its still very much an electronic (or would appear to be) issue, very distinct when it starts and stops. Im screwed if the engine is up for a reco. I cant afford that lol. Just had the gearbox done, and now the diff has gone, definitely hadnt planned on building a motor.

Well i havent done for a while, but i do know it was pretty average last time i checked. But it does have 325,000km on it untouched. Another theory i had, which i want to seek views on. When i had the gearbox replaced recently, the transmission shop told me the head gasket was leaking slightly at the back of the head, dropping a bit of coolant, which i have no seen for myself. Could there be a chance that under certain pressures as the engine warms up, the head gasket is spraying or leaking a bit of coolant into the cylinders, or 1 cylinder, causing the engine to missfire until it either builds up enough pressure or temp to seal the leak, or it dries whatever coolant out and starts to fire the cylinder again. I stuck my inspection camera down all the cylinders recently when i checked the plugs, and it appeared there may have been a slight bit of something seeping into a couple of the cylinders where the head and block meet, from the passenger side of the engine. However,my camera wasnt clear enough to make out what it was. Also the pistons looked very dirty on top, or crusty, but again couldnt make it out.

I set the timing when i replaced the module last year, but my timing light has since shit itself. Plugs seemed fine when i checked them, but they are LPG plugs, i just never got around to replacing them. Haha try 9.5-11L/100km on the hwy, 13 around town I did clean the AFM last year with proper aerosol cleaner stuff, made a difference in the way it drove, but didnt help the miss. Volts are all good. Well should be, i have both the normal digital volts guage in the car, and an aftermarket analogue VDO volt gauge, which reads about 14.1V all the time.

yeah exactly my thoughts Thom. There is a wire in the injector loom that they broke and tapped into for the fuse and LPG solenoid, which i had to re-solder join together. i have checked that, and that join i put in seems to be holding up ok, BUT, somehow that engine fuse is still bypassed. I suspect that wherever that bypass is for the fuse, maybe the bad join thats causing the stalling

No I haven't got a spare AFM, maybe i should try that. And no it definitely can't run without the AFM. I have just discovered, like 5 minutes ago, that the "engine" fuse in the fuse dox does NOT A THING! if i pull it out while the car is running, it keeps running, and starts fine without it too. I tried pulling the injector loom apart while it was running, and it did exactly what it does when it stalls. identical symptoms. So i tried wriggling wires around on the looms, and couldn't get it to stall. Same with the temp sensor for the ECU, unplug it while its running, and it shows identical symptoms to when it stalls on me. but again, no luck wriggling its wires etc while running. I think the the stalling issue might be a intermittent broken wire somewhere, but where i got NFI. The bigger issue is still this horrible misfiring issue.

The ecu didnt help in regards to the miss. The car felt to have a bit more power, but that was about it. Plug leads was a thought, but because the miss starts and stops at specific moments, i cant see how leads wpuld cause it, however i have another 2 sets of leads, second hand i could try.

Yeah i ran a NOS one i borrowed off sparky dave for a couple months.

What bosch plugs? Part numbers? I looked up bosch, ngk and champion part numbers, so will be interesting to see what bosch units you run.

Ok cool. I need to replace mine, im still running NGK R (cant remember exact part number) for lpg, and i removed the gas 18 months ago. Its a stock efi crossy, extractors, manual. Just want something that will perform properly

wow. Finally found your thread to take a look at. I have spoken with you on Facebook about this car a few times. Good luck with it. I honestly thought i was diving into the unknown buying the turbo xe wagon, but i think our XE is a little better off than this. Ill be watching your progress mate.

Yeah i guess it was just extra slippery today, but like i said never known the wagon to be so easy and suddenly uncontrollable. I think what got me was the fact i had zero warning when it really let go. Just went from fine to shitting myself looking at a wall hoping not to hit it.

I figured that, but its been raining all night. A good 12 hours of rain down here i would think most of that gone.

Hi guys, avout to change the diff in the wagon, while its out i want to reset the leafs. What is a ball park figure of cost involved, and what do i need to do in prep before i take them in to be done? Cheers

yeah it went straight on. the only thing is i need a different type of retaining spring for the other end to hold the sleeves in.