Two problems. Whoever solves both wins an all expense trip for two to Paris or our deep thanks, at our election.

1. Virtually no heat coming out the driver side vents when the passenger side vents have plenty of heat. I have seen 411,612,938 discussions regarding this on the Internet and I gather it is either a blend motor or a clogged radiator under the dash. I would much rather try back washing the radiator first but why would a blockage in the radiator only affect one half of the heating supply to the car? Are there two separate "radiators" under the dash, one for the right one for the left? That part doesn't make much sense to me but it's easy enough to check as a first step.

2. According to one of those plug-in gadgets I am having a misfire on cylinder number one. It clears up and then comes back. Mostly at idle and it'll misfire every eight or nine seconds. My original thought was a clogged fuel injector and a poured a bunch of seafoam and stuffinto the gas and it did help a bit but then it will come back again. If you had an intermittent missing on your number one cylinder in what order would you attack it? More gas additive? Spark plug wire? Spark plug?

The car is a 2006 Range Rover sport HSE and has approximately 200,000 miles on it. Open to any and all suggestions. Thanks all

 

Number one is probably a blend door issue. Number 2 replace the coil (no wires) and spark plug