no power under load when cold

[globy]

hi, we have a 98 1.8 rs, it will not go up our drive when cold without much revving and clutch dragging(ugh) have changed plugs and leads, have just discovered that the breather pipe that goes from the bottom of the rear of the inlet manifold to the exhaust is missing in the parts diagram it is called the pipe egr which is under the egr valve, could this be the problem?the car runs ok the rest of the time.

[blackbetty]

im well confused as to what you mean is missing???
maybe post a pic?

[sprsta]

its the EGR pipe wich shouldnt caus the peroblem its just for emissions
there will be blanks where it was connected


when was the last time you did the plugs?
if you havent done them thats where i would start
itll probibly will have bkr5e 11 plugs in there (cheap and plentiful)
try get some bkr6eix 11 (not so cheap but a good iridium plug)
if that doesnt help then replace the leads

the ecu will be putting more gas in when its cold so you will need a good spark to burn it

[globy]

thanks, yep done plugs bkr511s and leads genuine mazda $70 from local dealer, idles 900 perfectly when warm, runs on bp98 or mobil 97.5. i think ineed to plug up the hole in the manifold & what about exhaust, what say you

[blackbetty]

is there anything to be lost or gained by blanking of the egr?

[sprsta]

nothing what so ever

[zorruno]

did you get this sorted? My 94 1.8 had an idle on cold problem for a while (wouldn't idle at all for the first few mins after starting)

Don at Autoway Services sorted it for me when he did other work - I forgot to ask what he had done though.

[sprsta]

also you could try cleaning the throttle body if its not fixed yet

run some carb cleaner down the intake while giving the engine some revs

[Greenracer5]

Try a new or reconditioned coil pack. NBs are notorious for these giving up in later life.
Maybe someone could swap out a good one for you to try first??

[Euen]

I am not sure if the JDM cars had EGR till NB which could explain why the pipe is missing.

The ecu has a separate temperature sensor which allows it to adjust the mixture at various temps and also the idle speed control. If this is not working properly it could be causing your problem. Did you notice if the plugs were showing signs of excess fuel when you took them out?

The coil problem of the 1.8s would be more likely to manifest itself at high temps rather than when cold. I have a spare if you want to try it however it is the 3 terminal variety. There are 2 types, 3 and 4 terminal. If you are in Auckland send me a PM and we can organise something.

Cheers
Euen