evening all, im in need of some help regarding cold start. What i need to know is what components on the z could the very cold weather possibly condensation/damp get to that would prevent it from starting under these conditions.

Edited May 4, 200916 yr by snoopy

It sounds as though you may just have ignition problems which is causing it get over rich and sooting the plugs up resulting in a misfire, black smoke amd flaming. Check the connectors on the PTU and the CAS to make sure they are clean (use alloy wheel cleaner then very lightly coat in vaseline). If no joy then you have to think about plug coil packs which do break down with age and gets amplified when in damp cold atmospheres.

i'll bet its something to do with the o2 sensors.

 

Ive recently fitted an air/fuel gauge and ever since tapping into the wire my car doesn't want to start in the cold, it fires first time but then is real lumpy for about 20 seconds like 'uncle buck's car.

then a sudden lease of life and its fine

Iv.e got no vac leaks as far as i know. (but havent done leak test as dont have compressor)

 

I Have 2 set of plugs (ngk11b's) and (Ik20's). keep cleaning each set and drying in the oven as they are getting soaked in fuel with all the starting attempts.

 

Standard ecu not boosted.

 

All oils and filters recently done.

 

replacement rad fitted 6 weeks ago. (But not much anti freeze in there).

 

New water pump fitted 6 weeks ago.

 

new o2 sensor fitted 2 weeks ago.

 

Spliced 4 new coil pack connectors in today.

 

6 new injector connectors fitted not long ago.

 

4 Replacement coil packs fitted for test purposes....

 

I checked the main earth cable from the battery 2 days ago and the thread had stripped on the connection at the back of the block so i relocated it to a bolt hole about 2 inches away. and at the same time i cleaned and tested the earth connection right round the engine, all is ok.

 

today i checked and cleaned every single electrical connector i could get my hands on, so all is good there.

 

I also checked all vacume hoses etc that i could get too, they are all good, (I checked the intercooler clamps around 3 months ago so they should still be ok).

 

I have also bell tested the wiring loom from ptu connectors to coil connectors, to earth, to ingition relay all is ok.

 

All injectors click when cas is turned.

 

Cheers Jay

Edited May 4, 200916 yr by snoopy

Consult or datascan will not read your timing.It only shows what base timing the ecu is set for.

Consult or datascan will not read your timing.It only shows what base timing the ecu is set for.

 

Hi Jimmer, I understand that but if you have consult or datascan plugged in with ignition on and cas bolts loose and you turn the cas clockwise or anticlocwise, should the timing reading on consult or datascan change according to the position of the cas?

No mate.The ecu can not read what your base timing figure is.It assumes youve set it at the correct figure of 15 degrees as this is what it looks for and uses for any advance of the ignition.The figure you get on your datascan will read 15 as the ecu is looking for that base setting.