Corsa D 1.4i (Z14XEP) cold start issue.

[gerriecpt]

Hi all

I have a 1.4i Corsa D with the Z14XEP engine. The car start very difficult when it stood for a while. It seems that when the car is cold, the fuel mixture is very lean. While trying to start it, i push the petrol peddle also and after the third to forth attempt it will start. While trying to get it to start one can hear that the engine is getting fuel but it seems to be to little. I have also observed that when I spray easy start into the intake a cold start is much easier.
Once the car is hot, it starts first time every time.

I have done the following:
- There are no error codes
- I replaced the 2 terminal temperature (multi function) sensor as this can cause too lean mixture during cold start
- Compression on all 4 cylinder is good and almost identical
- New spark plugs
- New air-cleaner
- Checked for vacuum loss on the intake.
- Checked the spray pattern of the injectors.
- Eventually when it starts (cold) the vacuum is 20.4 in/Hg (reported by the ecu)

What more can I check or try?

-

[gerriecpt]

One more comment: I have new petrol and tested the fuel rail pressure and it is fine

[racin-snake]

Have you checked manifold flaps are working ?

any fault codes ?

[Meat-Head]

Fuel filter blocked

battry voltage on crank?

check engine rpm on crank

[hid3]

Corsa D Z14XEP does NOT have fuel filter...

[gerriecpt]

As per original post: No error codes. Crank and cam position sensor works since the car does eventual start. It is as if there is not enough petrol during the cold start that is why I described it as running to lean.

Yes no fuel filter. This must have something to do with the cold start system. Not sure how to check the manifold flaps.

[Meat-Head]

OFF TOPIC:-

ford fiesta like year 2000 have two idle maps, one gets corrupt and when idle map 1
once over 5mph map 2 which ups rpm a little.

get to traffic lights, cuts out, unplug speed sensor so never off idle map 1 no stalling

ON TOPIC

ASK local dealer cost of reflash ing software in ecu

[autoden]

Try to start with no pedal push. You are putting it in clear flood mode.

[Meat-Head]

You are putting it in clear flood mode.

awesome post, love them #antiflood features, normally only works when fully planted
awesome idea if ever there was on. Great for flattering batteries of people you don’t like .

to prove that get it warm and repeat the experiment