a puzzling misfire on a Factory MGBGTV8 and finding replacement wiring harness
Ian Ailes had experienced a misfire on his MGBGTV8 which
he eventually put down to a crushed fuel line above the filter on the bulkhead.
However the problem came back. So he decided to replace the Newtronic electronic
ignition with an Accuspark unit. This seemed to transform the engine on a test
drive until he pulled up in his drive and it promptly and conveniently cut out!
I got it to start again, but then the same old problem again - as he shut the
bonnet the engine cut out. .
Looking very carefully around the engine
bay he then noticed the front wiring loom was damaged; it had been fouling on
the bonnet catch and of course, the catch had worn through the loom. Thankfully
the problem was finally solved and was temporarily fixed with some tape.
Ian thought that when the car was resprayed by a previous owner, they must have
discarded the wiring harness clips which go on the panel above the oil cooler
(the bonnet lock platform) and in their place put in "P" clips neatly
underneath. The original MGB loom would have gone through the hole in the brace
panel below but the V8 loom is too thick so the Factory introduced clips, which
the rubber bumper cars also use, to fix it to the front of the panel well away
from the bonnet catch. Imagine my relief at solving this one.
Ian then sought help in tracking down a source of replacement clips
- he asked Peter Beadle "are they available anywhere?"
Beadle responded saying "there are two sizes of this clip - BHA4232 the
smaller clip is designed to support two cable bundles up to 1/4"dia each
and BHA4233, the larger clip which is designed to support two cable bundles up
to 5/16"dia each. Both sizes were used on MG Midgets whereas the MGB Parts
Catalogue AKM0039 only lists BHA4233 Clip -edge on page 108-H 50. I think
that both Moss
Europe and Brown & Gammons supersede the two part numbers above to a "similar"
clip, BHA4473, which performs the same function and still looks correct.
They both currently have a stock of BHA4473 (Wiring Edge Clip) at approximately
60p each." See
our illustrated note
do these clips go?
They support the wiring loom and four clips are attached
to the front edge of the bonnet lock platform in front of the radiator and cooling