Idle switch question

[fixkick]

hello and welcome
what year is car?
first what is in your Escudo, what engine, what trans.?
G16? engine? susuki use lots of engines world wide. yes, is it 8valve or 16valve if 4 cylinder, 1.6L engine SOHC. (single cam)
the Escudo came in Sq416 and SW420 versions, 4 cyclinder 1.6 and 2.0 liter engines up to 2003 and 1 diesel you dont have.
and radical different EFI too, ever seen a JDM version of a car and wow (some are smog free, no CAT, no EGR, no 02 sensors)
10 gallon tank? (or in liters what?) 9 L/100km is normal. (highway miles not city)
cold bog is serious. but is not really a full on bog but is just small hesitation.?
how low RPM , or tacho missing in dash?
your fire wall next to battery , has Huge TAG, that shows what car you really have, for sure this. see 24 there. what is your 24, means country code)?

Hey everyone, I'm after a bit of help with my Suzuki escudo. Symptoms are:
I'm only getting 320km from a full tank of gas. 320km is 200miles, 10 gallons is 20MPG, and is 6 low about. but the liters used Id need to know.
Slight bog on acceleration (hot and cold), but only when first pressing accelerator pedal. (so WOT wide open throttle has full power?)
Revs and accelerates great right up to 100kph otherwise. ok just hesitation,
Low rpm at idle, engine shakes a little and seems to misfire at idle. hot idle is 800RPM , how low is low? RPM=

I have tested and calibrated the tps according to fix kick instructions.
Everything checks out right apart from the idle switch goes from 0v at idle to 11.7v off idle.
Shouldn't it be 5v? (but only on our cars, in USA, are 5v) no engine stated.
Is this a clue to some of the symptoms I'm experiencing?

I've given it a good tune up. New HV leads, timing belt, spark plugs, dizzy cap, checked and repaired sheared crankshaft keyway, set ignition timing, checked compression (155 all cylinders), checked fuel pressure (36psi). (at idle?)

Any advice would be awesome thanks!
Brendon