24hrs is a bit overkill, 5 mins is more than enough !

Jim


Matthew Wastell wrote:
Ate you using a different manifold and injectors with old ecu? It could be they are mismatched. Otherwise if you swapped the ecu and no intake temp sensor it could be missing that.

You can also easily scramble the learning map on the ford ecu so need to follow the bed in procedure. Unfortunatly I can't remember exactly how it goes, but something like, leave battery off for 24 hours, start and idle for 5 minutes then do a full and varied drive cycle for 30 mins.

Give us a few more pointers and  sure we can give you more suggestions.

Matthew
(2.0 litre zetec turbo 2+2)




On 3 May 2010, at 21:26, Rolf <[email protected]> wrote:

Hi all,
I recently swapped my 1600 zetec engine (1996) for a slightly newer ,
also 1996 engine, but there are some differences.
The intakemanifold on the old engine is alloy, the newer is plastic.
The swap took a while, but everything went in place. Only an intake
air temp sensor was not connected because there used to be none.
All went well, but after a drive on the motoway i noticed lack of
power. On the return journey the engine rocked about at 30mph.  When
climbing in the revs on full throttle, it staggers at 4000rpm.
Releasing the throttle a bit "releases"more power and it climbes to
6500 rpm smoothly. It's hard to describe, because it doesn't happen
all the time.
What can it be?

The oxygen sensor replaced(coulored red , due to additives (?)
accoring to Bosch.
Tried old throttle position sensor on newer throttlehousing.
Tried to replac the airmass sensor, but not yet possible due to
"plumbing"problems...
Tried resetting the computer.

Does any zetec specialist have a clue?

Regards,
Rolf

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