how smooth should a zed idle?

 

i ahve beem trying to iron out all the bugs from my zed. im not sure if i still have a problem or not. i stilll feel it could be better.

 

it deffinatly does not misfire but still has a slightly lumpy idle which infact feels worse when touching the body of the car than touching the engine.

 

i have replaced all the connectors

checked the temp sensor resistance

replaced the pcv valves (they were new anyway)

cleaned up the cas today and set timing the 15 btdc- was about 11

cleaned out throttles

replaced all vac hoses

checked coil packs and the springs that go to the plugs

cleaned out idle valves etc

deleated carbon canister and aiv

checked tps voltage is 0.45v

 

all the above seem to have inproved things but im still not entirly happy. when sitting in the car holding the wheel you can feel some vibrations.

 

 

a few things i thought it could be are knackered box mount which i will change when doing my manual conversion.

 

i also noticed when setting the ignition timing that the cas is not centred now and is most of the way to anti clockwise (you can still see a bit of the slot though) i also checked the cam belt and it is not perfectly lined up with the markings. the belt was done about 2 years ago, by z world i think so should be fine.

 

i did clean out the maf a while ago and seemed fine- could this be the culprit- is there a difinitive test for it?

 

i have also noticed that some times it starts as soon as you turn the key, other times it takes a second or two- maf? it also can smell of petrol when booting it.

 

sorry to waffel on

You could change your ptu. mine started to do this when it was on its way out.

 

Also it use to take 4 turns of the engine to start. now it is back to one :)

did you go for a series 2 or just a new series 1?

any advise on this jeff?

It should be near Rolls in quality! Well smooth and slow anyway.

 

Clean the idle valve and reset the tickover afterwards following the manual instructions and doing it like it says with the ecu connector off it then re connecting it. It makes a huge difference to the idling and this valve can be well clogged at this age.

 

Gizmo at the back of the passenger side plenum!

unfortunatly i did that last week. set the base timing with the connector disconected then connected it. the revs did not rise though as i thought they should.:(

 

also started nearly stalling when starting up so i think the control valve may be shot/ faulty aswell now. perhapse i wired it up the wrong way:smash:

the revs did not rise though as i thought they should.

 

 

 

There is a distinct change in revs with this connected.

 

I also have erratic idling from time to time on mine with too high tickover but a wiggle of the connector and wiring under the tps always sorts it and it settles back down to an even steady smooth idle. Hardly scientific but it always worked till now.

:Dthe tps wiing is one thing i have not messed with yet. perhapse that could be part of the problem as i did have it disconnected when i cleaned the idle valves. thanks

 

keep the ideas coming and ill keep checking