any ford know it alls out there?

[hipo1024]

I have a problem with a 2002 ford ka 1.3 endura-e engine. It idles at about 2k rpm and sounds like it's only running on 3 cylinders. When I pulled the ht leads off 1 at a time all but cylinder 3 caused a drop in revs. So I swapped the plugs around but the problem stayed with pot 3, so it's not the plugs. Google then told me that the coil packs are made of cheese so I got a new one as they are only cheap. Today I fitted said new coil pack, and it's made sod all difference at all. I then thought I haven't considered the ht leads themselves so I swapped 2 of them around (at both ends obviously) but again it stayed with pot 3.

So as it stands the plugs are good, as are the leads and the coil pack is new so the ignition system is ok. I then turned to the compression side of things, but all have around the same with 3 and 4 having slightly higher compression but not by much, so that's all ok.

Then I turned to the injectors (only thing left really lol). I did the same test as I did with the leads, disconnecting 1 injector at a time and again with number 3 injector disconnected the revs stayed high (no difference actually). So I thought aha blocked injector, so to see if it blocked I disconnected all but injector 3 and turned the key expecting nothing. But when I let go of the key it continued to run. I couldn't believe it, when everything else had told me it wasn't running on pot 3, now it is only running on pot 3 with all 4 plugs still in so it's fighting compression as well, it even revved alittle (engine speed increasing very slowly mind you). So I did the same test on the other 3 injectors and they all ran ok, BUT the other 3 did idle slightly higher then number 3. So would this be a blocked injector, a faulty injector or time to smash the fcuking thing to bits?

[RatCav]

Swap injector 2 ond 3 over and see what happens ... failing that source a second hand injector and see what happens.

I doubt a dose of redex would work but its a cheap option.

[martinkettering]

Check plug gaps,they should be around 1mm,high idle is normaly due to the icv needing a clean,swap injector for a replacement and check wiring to no 3 injector aswell.

[hipo1024]

Plug gaps are right and even across the board and I've replaced the icv, air temp/flow sensor and the tps all resulting in no difference at all lol. So we all fairly settled on the injector(s) then? I'll see if I can get a set off the bay for not very much then

[dave1966]

hipo1024,I had this problem with my 2.4 petrol Fronty and it turned out to be number 2 injector and I would think it could be number 3 injector.
Start it up and put a screwdriver on the top of each injector and put your ear to the handle end of the screwdriver and you should be able to hear if there is any differences,this is what the mechanic did on my 2.4 petrol Fronty to find the faulty injector.

[gregster]

Then try the same test on the HT leads dan, using a hammer through screwdriver so you can hear the electrickery properly

[RatCav]

[hipo1024]

I'll give that ago Greg. But I'm fairly sure it has spark . As for the injectors they are all working but 3 is definitely running at a reduced rate. I've ordered a set of 4 off the bay for a Tenna inc postage. They have been tested and come with a guarantee so can't grumble.

[gregster]

Dont try what I suggested Dan ...you'll frazzle your gingerness