'79 CIS TO EFI
Posted: Wed Nov 20, 2024 11:28 am
I am posting this on IB, but as I have been asked to cross-post here ....
Well, it was supposed to happen a couple of weeks ago, but it didn't. However, it did finally start today......
The poor, unsuspecting CIS System, sitting there waiting to go out to play
and for those that don't know what an SC engine bay looks like ......
complete with auxiliary heater blower
So, new plan includes replacing this
with some of this
and these (when they've been cleaned, had new injectors, etc)
Alex, the Garage b1tch (aka GFB on biker forums) came over, so we needed an initial TODO List (not a chance we would do much more than make a start on it today though)
So, where to start. Well how about air filter off, and then the rubber boot that joins the throttle body to the inlets.
Next let's remove the aux blower fan. First by increasing access by ditching the dissie cap and leads
Then disconnect all the fuel lines (well maybe not all the first time around, as we discovered a little later)
Then, working our way around the engine, we disconnected all of the electrical connectors and pipework. Alex busy at work, trying to remove the inlet manifold nuts
It is possible to remove the CIS without dropping the engine, although we did also have to remove the aux air pipework that runs behind & under the CIS stuff, loosen the bracket thingy that the throttle return spring connects to, and a bracket at the rear.
This is the bracket at the rear that I forgot about initially
I did remember the rear electrical connections for the 7th injector & the throttle body flap switch, although it needed the CIS system rotating slightly to get decent access.
I did have to remove the engine breather pipe completely, as I had routed it neatly out of the way during the resto, or maybe that should be had unfortunately woven it through a lot of pipework and cables under the CIS. I also removed the aluminium pipework that goes to the Aux Air Valve, amongst other things and spend a while unweaving harness wires.
Nevermind, out it did come, to be replaced temporarily by some good, old, blue paper towels
Next was the CDI Box, leaving some loomage work to follow
Next we popped underneath, and whipped off the exhaust and manifolds, ready for lambda bungs. I"ll be running a separate sensor for each bank
Oh, and in a minute of excitment, I also removed the passenger seat to gain access to mount the ECU (also for another day)
All in all, a successful day (which also included replacing a parking sensor on my X1 daily to fix the PDC, and collecting the bits to fix a neighbour's Audi Q5 - he thought that he had stuffed his gearbox, but when I peered under the hood, I suspected that the injector for #4 cylinder probably shouldn't be sticking out 100mm due to a failed retaining bolt, and maybe that is why it wouldn't run nicely. Fitting his bits in the morning).
Watch this space .......
Well, it was supposed to happen a couple of weeks ago, but it didn't. However, it did finally start today......
The poor, unsuspecting CIS System, sitting there waiting to go out to play
and for those that don't know what an SC engine bay looks like ......
complete with auxiliary heater blower
So, new plan includes replacing this
with some of this
and these (when they've been cleaned, had new injectors, etc)
Alex, the Garage b1tch (aka GFB on biker forums) came over, so we needed an initial TODO List (not a chance we would do much more than make a start on it today though)
So, where to start. Well how about air filter off, and then the rubber boot that joins the throttle body to the inlets.
Next let's remove the aux blower fan. First by increasing access by ditching the dissie cap and leads
Then disconnect all the fuel lines (well maybe not all the first time around, as we discovered a little later)
Then, working our way around the engine, we disconnected all of the electrical connectors and pipework. Alex busy at work, trying to remove the inlet manifold nuts
It is possible to remove the CIS without dropping the engine, although we did also have to remove the aux air pipework that runs behind & under the CIS stuff, loosen the bracket thingy that the throttle return spring connects to, and a bracket at the rear.
This is the bracket at the rear that I forgot about initially
I did remember the rear electrical connections for the 7th injector & the throttle body flap switch, although it needed the CIS system rotating slightly to get decent access.
I did have to remove the engine breather pipe completely, as I had routed it neatly out of the way during the resto, or maybe that should be had unfortunately woven it through a lot of pipework and cables under the CIS. I also removed the aluminium pipework that goes to the Aux Air Valve, amongst other things and spend a while unweaving harness wires.
Nevermind, out it did come, to be replaced temporarily by some good, old, blue paper towels
Next was the CDI Box, leaving some loomage work to follow
Next we popped underneath, and whipped off the exhaust and manifolds, ready for lambda bungs. I"ll be running a separate sensor for each bank
Oh, and in a minute of excitment, I also removed the passenger seat to gain access to mount the ECU (also for another day)
All in all, a successful day (which also included replacing a parking sensor on my X1 daily to fix the PDC, and collecting the bits to fix a neighbour's Audi Q5 - he thought that he had stuffed his gearbox, but when I peered under the hood, I suspected that the injector for #4 cylinder probably shouldn't be sticking out 100mm due to a failed retaining bolt, and maybe that is why it wouldn't run nicely. Fitting his bits in the morning).
Watch this space .......
