PistonHeads.com Forum

misfire / poor running when cold

misfire / poor running when cold

Author
Discussion

willibum

Original Poster:

81 posts

107 months

Tuesday 17th July 2012
quotequote all
Hoping someone can help with an issue I have with my wife's 1991 Eunos 1.6 auto.
It's an excellent car and runs really well but has a really irritating problem before it warms up. When cold it feels like it wants to stall, the revs are slightly erratic but once warm it runs beautifully.
Before I take into my local independent I wondered if anyone had any ideas.
I have recently had some work done on it including cambelt kit, water pump, thermostat & housing and temperature sensor - not sure if this is relevant but the car didn't display any erratic running when cold previously!
Thank you in advance.

VladD

6,266 posts

173 months

Wednesday 18th July 2012
quotequote all
willibum said:
Hoping someone can help with an issue I have with my wife's 1991 Eunos 1.6 auto.
It's an excellent car and runs really well but has a really irritating problem before it warms up. When cold it feels like it wants to stall, the revs are slightly erratic but once warm it runs beautifully.
Before I take into my local independent I wondered if anyone had any ideas.
I have recently had some work done on it including cambelt kit, water pump, thermostat & housing and temperature sensor - not sure if this is relevant but the car didn't display any erratic running when cold previously!
Thank you in advance.
I'm not an expert here at all, but I have a feeling that when the battery is disconnected for some time, the ECU takes a while to relearn it's configuration. Keep driving it and it may get better. I'll see if I can find a reference to this somewhere.

mneame

1,440 posts

119 months

Thursday 19th July 2012
quotequote all
Try swapping the temp sensor out for the old one. Maybe the wrong gap on the plugs as well?