The fuel injectors and a bunch of other devices in the engine bay are connected to the engine harness via a 2 pin (female pin) connector, PN 443906232. This is Item 11 in this engine bay harness diagram (there are a bunch of devices that use this connector):
Andy P (here on the S2Forum) had issues with a miss on his ABY S2. Naturally we gave him lots of ideas (coils, plugs, connectors, etc etc). Eventually, he fixed his problem by doing a bunch of things at the same time (plugs, better ground(s) and fixing a wiring issue at one (two?) of the injectors. It is likely that the issue was the injector wiring (where did we here *that* one lately)(1gcrazy's miss was based on broken injector wire).
Here is what a hopefully good injector connector (one of mine) looks like (note the purple plastic pin holder):
Here is a shot of one of Andy P's good purple pin holders:
Photo courtesy of Andy P.
Here is a shot of one of Andy P's bad pin holders:
Photo courtesy of Andy P.
Here is another shot of a bad pin holder:
Photo courtesy of Andy P.
It is easy to imagine the possibility of the two wires going to the fuel injectors touching (arching) in one of those bad pin holders, causing a lean mis-fire (not enough fuel in that cylinder).
Andy P replaced the bad pin holders with a new one-piece two pin connector like this one:
Photo courtesy of Andy P.
Bottomline: We now have another thing to check when misses are experienced. (Sorry) :-(
Hints on dealing with the purple pin holders are found in this POS pin swapping post:
This info is also in my fuel injector wiring post:
Andy P (here on the S2Forum) had issues with a miss on his ABY S2. Naturally we gave him lots of ideas (coils, plugs, connectors, etc etc). Eventually, he fixed his problem by doing a bunch of things at the same time (plugs, better ground(s) and fixing a wiring issue at one (two?) of the injectors. It is likely that the issue was the injector wiring (where did we here *that* one lately)(1gcrazy's miss was based on broken injector wire).
Here is what a hopefully good injector connector (one of mine) looks like (note the purple plastic pin holder):
Here is a shot of one of Andy P's good purple pin holders:
Photo courtesy of Andy P.
Here is a shot of one of Andy P's bad pin holders:
Photo courtesy of Andy P.
Here is another shot of a bad pin holder:
Photo courtesy of Andy P.
It is easy to imagine the possibility of the two wires going to the fuel injectors touching (arching) in one of those bad pin holders, causing a lean mis-fire (not enough fuel in that cylinder).
Andy P replaced the bad pin holders with a new one-piece two pin connector like this one:
Photo courtesy of Andy P.
Bottomline: We now have another thing to check when misses are experienced. (Sorry) :-(
Hints on dealing with the purple pin holders are found in this POS pin swapping post:
This info is also in my fuel injector wiring post: