Zafira 2.2 cold starter - no MAF

maxtsu

Hi All
Being searching about for help with my car, and found myself here.
Hoping I can gain some of your expert knowledge.
Have a Holden Zafira '01 (Same as a Vauxhall) 2.2 auto. It has a z22se engine.
It has suddenly become a cold starter. Lumpy idle, and no power when cold. 200m down the road it is fine.
I would have said that the if it had a carb, then the choke was off.
This all pointed me to the MAF, and I went to clean it.
After a lot of head-scratching, and looking at pictures and diagrams, I finally worked out that there is no MAF in the z22se engine.

So my query: if there is no MAF, what does the same/equivalent job?
And what else could be causing my problem? since there is no MAF

Any help appreciated.

Cheers

JohnnyN

The z22se has a MAP Sensor, Manifold Absolute Pressure.

http://www.bosch.com.au/content/language1/html/4596.htm

There is also an Air Intake Temperature Sensor that is located at the inlet pipe that exits the air filter box and joins to the throttle body.

.....and, there is another sensor, Coolant Temperature Sensor that can affect fuelling. This is located at the rear of the cylinder head next to the exhaust manifold to the R/H side if you are stood in front of the car.

Welcome to the site!

:thumbup:

Daz

I've got a map sensor here if u need one fella.... mucho cheapness too....

maxtsu

Thanks guys.
Daz: if you can post to Oz, I may take you up on the offer.
But first things first, I want to clean the MAP sensor first to see if that will fix it.
To get it out (correct me if I am wrong) I need to remove the throttle body.
The connector to the throttle body will not shift. Was trying to pry it off, but the plastic started to crack, do not want to damage it.
Anyone know the trick to the getting the connector off the throttle body?

cheers

jwalker

Push down on the tab and remove, but be gentle

maxtsu

Wanted to drop an update of my results in case other people search the forum with the same issue.
I was eventually able to remove the connector to the throttle body, some previous owner "glued" the connector on!
Reading on the computer showed no fault.

I replaced the MAP sensor, and the car ran smooth-as afterwards.
So faulty MAP that did not show up on the computer.