[sbowling]

I have a 2002 ZX5, 2.0L Zetec DOHC that the idle trys to drop out when it's cold. It does this a couple of times in the morning when I drive to work while the engine temp is cold and I come to a stop. As soon as the engine gets up to temperature, it idles fine but I do notice a little fluxuation in the idle at stop lights, but nothing major.

Anyone with an idea, DPFE, IAC, MAF, EGR...???

 

[PhilAIV]

Does your focus pop any codes when it happens? The reason I ask is that I had it happen to my focus (01 zx3 dohc) twice, but hasn't happened since (around four months ago / same thing early morning, coldish). Mine didn't pop any codes, so I didn't even bother since it only occured twice, but if anyone has any suggestions, we're all ears.

 

[[email protected]]

I have a 2002 ZX5, 2.0L Zetec DOHC that the idle trys to drop out when it's cold. It does this a couple of times in the morning when I drive to work while the engine temp is cold and I come to a stop. As soon as the engine gets up to temperature, it idles fine but I do notice a little fluxuation in the idle at stop lights, but nothing major.

Anyone with an idea, DPFE, IAC, MAF, EGR...???

How many miles??? your spark plugs could be old, and clean your MAF.

 

[sbowling]

miles are around 92k and no codes.

 

[zx5Ye]

if you are still on stock spark plugs, then def try to replace them first

 

[whynotthinkwhynot]

Idle issues are generally IAC problems, but you should clean your TB, MAF, and replace spark plugs first before declaring the IAC as the cause.

 

[[email protected]]

ya with 92k its time for some plugs and clean your TB,MAF....and make sure your plugs are gaped right.....0.50

 

[sbowling]

I did a complete tune-up about 2 months ago and replaced plugs, plug wires, FF, PCV valve, installed K&N intake... I think that's it.
The car drives great and I get around 27-29 mpg in the city so I can't complain too much but it's those little things that drive me nuts. I've been tinkering with cars all my life so when something happens that I know isn't normal, I just have to find out why and fix it.
Also, cleaned the MAF but not the TB.