Running problems

[clipperjay]

get new plugs things have to be spot on even take one out check its running rich i.e soot!
When I speak about fifth injector the WUR could be the other fault

[klapwijk]

I've checked all the plugs and they are dry and look ok, but i will replace them anyway on thursday. Is replacing the WUR and fifth injector just a case of unbolting, fitting a new one and then bolting it all back up?

[clipperjay]

Yes you have the other 16ver to swap so lucky just for testing! Just make sure there is little pressure when mucking about with fuel okay!

[klapwijk]

I'll make sure there is no pressure! need to get this one running for Big Bang next weekend or its a case of putting the other one back together!

[clipperjay]

By the way if it was runnning fine for a few days are you sure the idle screw is not moving via vibrations and the seal is just too old tippex it and see if it deviates from that position! it might be just a simple new idle screw?
 

[klapwijk]

Good idea, I'll check that. Could this also cause the hunting?

When the problem started again, ye car started idling at 3000rpm again. Thought that ye Jose that came off had come of again. Turned the car off and left it for five minutes and it was just hunting again.

[clipperjay]

Good idea, I'll check that. Could this also cause the hunting?

When the problem started again, ye car started idling at 3000rpm again. Thought that ye Jose that came off had come of again. Turned the car off and left it for five minutes and it was just hunting again.

I once knew a chap who played about with the idle screw so much he damaged the brass screw and thats all was causing his hunting problems 
Well yeah it lets in too much air?
Warm up regulator can play up you my friend just need to start waspping stuff out for good parts!
Check voltages are present on the over run valve plug that caught me out but in my situation I forgot to push the pipe back on properly and caused massive co being out!

[klapwijk]

I'll get out the multimeter tomorrow then and check what voltages I get from it. When I disconnected it and started the car it idled at 2000, with no hunting. It is definitely on properly as I made sure, made the same mistake myself! Again what I am finding weird is why it only does it when its warm, would the idle screw not be causing it to hunt all the time? I can start the car, no hunting problem. Five-fifteen minutes down the road, hunting. Rev the car a couple of times - hunting goes away. Then it sometimes will idle at 1500rpm. Disconnect ISV, problem goes away - idles fine. Turn car off and on again sometimes it will hunt, sometimes it won't.

Thought it could be a sticking plunger in the metering head, took intake boot off and lifted the VAF a few times and it was moving freely. Gave it a good clean while I was there.

Do you think the thermotime switch could be causing any issues?

[clipperjay]

No it controls the fan and the one behind the block is a over run temp sensor for the fan hence sometimes when you turn the engine off and its hot the fan still runs on so highly unlikly to affect your symptoms.
Only thing left is WUR if its stuck open when its warm it will make it rich and lumpy?
By the time you fix her you will know everything about the the whole KR ballache 
As for the metering head the (VAF) flap as long it returns back to its position smoothly its should be alright. 

[klapwijk]

Thanks for your feedback once again! I'll replace the WUR and fifth injector and see how I get on. Hopefully this will sort the cold starting issue I've got as well. I'll replace them an then do the CO and idle speed again.

Is it normal after setting the idle speed with the red connector disconnected, to 1050 for it to then idle lower once reconnected?