New engine, serious idling problem - Not Icv? - Saxperience

Vtralex · 10th October 2010, 19:52

Fitted a vts into my vtr, however the ecu is off a different vts to the engine I fitted. It starts fine but the idling will idle at about 3k untill revved. It then fluctuates between 1500 and 2500 constantly bouncing up and down. Any idea what it could be?

LeeM · 10th October 2010, 20:01

Idle control valve

iSlayeR · 10th October 2010, 20:05

or new map sensor

Vtralex · 10th October 2010, 20:17

Is there any way of telling which of these it would be?

iSlayeR · 10th October 2010, 20:23

Quote:

Originally Posted by Vtralex

Is there any way of telling which of these it would be?

Clean the ICV with carb cleaner

move the map sensors wires gently, i soon as i did that on mine the revs went crazy and stalled, new sensor fixed it, Also remove it and clean it.

Vtralex · 10th October 2010, 20:33

Cool

Anything else it could be and will try sort it tomorrow

Stevo123 · 11th October 2010, 20:31

Also check simple things like is the brake vacuum pipe on? Are any aux pipes secure and in good condition (not split). Is throttle cable to tight holding the throttle open?

Just daft stuff that we easily overlook during the excitement of fitting a new engine!

Good luck mate

shane1234567 · 11th October 2010, 20:35

revs sticking may be coolent temp sensor, only £12 from shitroen for a vts, fixed my fault and it was the same as urs

Vtralex · 14th October 2010, 15:20

Just found a random plug that isnt plugged in... Also ran car for about ten minutes and it got very hot very quickly to the point the red light came on. Revs seem stick really badly also. Anyway yeah this isnt plugged in? Am i meant to have used the vts or vtr loom?

Vtralex · 15th October 2010, 22:19

Still no ideas?

shane1234567 · 16th October 2010, 11:20

have u a larger pic were that sensor is by as i cant make it out lol...

have u tried the temp sensor?? just when its over revving disconnect it and if the revs drop / temp then job done, get a new 1
its the green top sensor

Vtralex · 17th October 2010, 13:47

Will try that in a minute, and that one is next to the temp sensor above the gearbox.

Edit: Just tried and all it did was make it rev a bit hgher. Still had the same probem.

Also if it helps when I first start the car it idles at about 1200 then as it warms up it idles higher and then after 5 minutes or so goes completely stupid

wesley-saxo · 18th October 2010, 17:54

did u find out if it was your icv??

Vtralex · 18th October 2010, 21:02

Wasnt that either

Oc2 · 18th October 2010, 21:06

Ive got this, replaced ICV and Throttle body, no avail. check my thread titled Right... im rreally clutching at straws, but oh well

Vtralex · 20th October 2010, 15:53

Just cleaned ICV again, when spraying the carb cleaner through the TB the revs drop completely till it cuts out which is normal, but now instead of the revs gradually building they shoot up to about 3800 and dont ove unless you rev it, which causes them to go higher. No bouncing though so maybe i put it back together wrong?

lwigmore · 20th October 2010, 16:02

I saw that pic, it looks like the coolant temp sensor isn't even plugged in?

Vtralex · 20th October 2010, 16:18

The only one not plugged in is the brown one as there is nothing coming off the loom for it?

lwigmore · 20th October 2010, 21:41

Quote:

Originally Posted by Vtralex

The only one not plugged in is the brown one as there is nothing coming off the loom for it?

Im totally sure that's the coolant temp sensor though?

I'll have a look on my VTS tomorrow before work and see if im right

Vtralex · 20th October 2010, 21:49

Cheers mate

, I thought that was the green one for some reason. Out of interest should I have used the vts or the vtr loom?