First off I would like to thank all on this group for thier wonderful
information. It has made my first Rover experience very good,
especially for troubleshooting. I had been stumped by my stalling and
cut out problem since buying the truck a month ago. I had replace all
I could think of, short of the fuel pump, with no improvement. I was
getting ready to replace the pump when I read a post about the
occasional ECU dry solder problem. I thought why not give it a try.
So, I pull the ECU, open it up and re-solder the main transistor
joints, although they did not look real bad. I had the the ECU out for
about 45min. I reinstalled the ECU and the truck fired up, the check
engine light was off, and I have not stalled in 3 days. Also the truck
seems like a completely different vehicle. The power and acceleration
is up dramatically and the fuel economy is also improved. So, the
real question is- did I fix a dry solder joint or is this happy
rezzurection from restting the ECU alone? (Starting a new fresh fresh
fuel mapping from the factory default) I thought perhaps it could be
from the reset. If so, I'm amazed. Even if I changed the correct part
that was causing the fault would the ECU still behave as if I didn't
unless it was reset? And therefore run the injectors the same (stall)?
Fingers crossed that this fix holds.
you don't say which ecu but some certainly have the ability to learn, I
remember seeing an article or post on resetting and the drive/trip
(about 20 min ISTR) you should do to reset it properly.
did you get any diagnostics first, like P1176-9, I think these are the
ones that deal with air/fuel mixture learnt offsets.
It is the fuel injection ECU under the passengers seat (USA). Keep in
mind, my reset was accidental as I removed it to repair it. I drove it
around the neighborhood for 20 min, the engine light didn't return,
and it did not stall so I took it out to the freeway and ran it at
65mph for about 8-10 miles. It's been great so far. I am glad I took
it out to the highway for awhile because if resetting it causes it to
remap fuel and driving behavior, i'm glad I got that in. All purely
accidental. Of course there is always the remote possibility that I
actually repaired a dry joint in the ECU. I just can't give myself
that much credit. One thing troubleshooting sure does is get you
familiar with you vehicle very fast.
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