Running rich..

Hi,
for a number of months now i have tried combating this problem, however it was doing good, but all of a sudden its back again.
My car runs far too rich.
It stinks.
i pull up to lights, all i can smell is a mixture of burnt and unburnt fuel, i clean my exhaust tip out to show off that shiny shiny aha, and within about a day its black again.

So far i have replaced: in order of latest to first
Timing belt, water pump, all tensioners and pulleys-
cranked up ignition timing to 12-13degrees
replaced O2 sensor-
bottle of upper engine cleaner
new plugs, NGK iridiums
new leads- (cheaped out, eagle 300 leads for an st185 celica, as all of the mr2 ones didnt fit properly)
New genuine dizzy cap, rotor button, and coil pack
Fuel filter, and toyota fuel injector cleaner
new coolant and thermostat. all OEM bled properly.

And today i noticed, yes its quite hot. but it occurs on lower humid days aswell, it kind of stumbles a bit down low, now i thought with the ignition timing cranked it would be pretty fiesty down low.
im thinking perhaps, my cam timing is off.. but it was apparently set lining up the marks.
it seems to get 400-500 kms per tank.
Also it idles when warm at about 800ish rpm

im not sure what could cause this.
any ideas?
tps sensor?
coolant temp sensor?

any ideas would be great.

Thanks Aaron
how would I check pressure?
will check that vaccum line however!

So problem is still here after check all vaccum lines,
im thinking perhaps maybe someone has played woth the tps? is there a way to check/reset it
also, my pedal accel has a fair amount of free play, and my adjusting nuts wont budge (seized)
most likely, can you fiddle with the butterfly adjusting screw or dont touch it? ill try and soak the adjusters in freeze and release or something to try and free them up.

Also, i was thinking it may be the igniter i want to check the values on it make sure its working to spec, but cant seem to find a write up, anyone got links to the bgb? or pdf files?
or a spare igniter i could borrow to check if it makes a difference, really racking my brain now as to what it could be,

So basically it still blows some black smoke, under revving, and heavy accel especially low end revs in high gear,
and is a bit gutless taking off untill 2-2500 rpm

Not only hot days,
running full cai that's heat shielded and runs down to the side gills,
happens in hot or cold weather,

will give the plugs a good look, and do a comp test this weekend,
could another thing be a faulty or dyiong battery?
as the battery seems to be quite old and a very cheap one (brand i've never heard of)

will post up once I have conducted some tests,

leaning more towards the igniter as it did have a real bad flat spot, changed the coil and that helped a lot, but can still feel it.
so would not be surprised if its that,

will post up once ive tried to isolate/do a few checks.

Thanks a lot! 

Ok so a bit of an update
Put on another igniter I bought from road and track
Seemed it improve things a little but not much

So finally had some spare time to go over the car added a new ground wire from the negative terminal straight to the body seems to start a bit quicker now, pulled the plugs out all seemed the same colour brown/grey at the tip black everywhere else
I'll post a picture

Did a compression test did it twice on each cylinder
Average in each cylinder was:
Cylinder 1( farthest from dizzy) 178psi
Cylinder 2 180 psi
Cylinder 3 182 psi
Cylinder 4 178 psi

Lowest reading was 175 highest was 183psi
During testing

Not sure what my problem is
Someone please help..

Only sensor I have not replaced is the coolant temp
And the sensor that sits on the engine lid (oil temp)


Everything has been replaced with a brand new genuine item
Except using another used igniter

And a denso branded 02 sensor
Still plugged right in tho,

Not sure where to look now.


All i keep thinking is the cam timing is off.

You checked the ecu coolant temp sensor? Green plug one.

The bgb will tell you how to test it. It would of been one of the first items id check or replace for your issue. A new one is cheap.