Good morning to all of you
Have patience I write from Venice - Italy, this is my first post, but 2 years that I follow you and read, and thanks to a lot of your information here, I chose the Mio GW 89 black, and I can do the maintenance almost completely only.
Now I am writing to ask for your help in clarifying some of my doubts about the TBI conversion.
I read, a lot here and on binderplanet, and I made sure that the best TBI kit is that of Bill Hamilton, with GM parts and time control.
For the ease of installation, for the possibility of a more prone touning, and especially for the great preparation of Bill in this field.
My '89 black is now configured with all the emissions control system installed.
I changed and installed a new smog pump 2 months ago.
I installed a few months ago a new exhaust 3 "Magnaflow with cat to air intake (taken BJ), excellent performance and sound.
All vacuum lines are correctly connected and functioning, including the various CTO and EGR valve ports. Stock control module ignition.
I upgraded HEI Ford cap, new rotor, cables, coil.
It runs perfectly and strong.
I can only "complain" difficult ignition after 5-6 days of non-use, where I have to insist many times with the starter motor pima that comes on. This does not happen if I use it the day before or ten minutes before, where hot or cold comes on immediately and promptly. I believe it depends on the mechanical fuel pump, even if new.
Air choke works perfectly and after 2 minutes the minimum is lowered correctly.
No hesitation in cold or heat.
I adjusted the ignition timing with vacuum gauge, anticipating ulteriormnte until maximum reading vacuum (20-21hg) and abassed by 1 point hg to avoid ping - not preent). I believe very much in the adjustment of the times with a vacuum gauge, for me a real essential tool in the garage.
This is not my first experience with V8, I've had other American cars over the years, but they did not have such "complex" emissions control. So I read a lot to understand how it works, and to keep it at its best.
(I am aware that emissions control does not steal the engine from the hp and helps it work better, cooler and less nox emissions - so I would like to keep it as much as possible stocck).
In Italy, emissions control under review, for vehicles over 30 years, are controlled as in your States, CA.
It is checked visually that there is cat and smog pump (when this standard present).
From what I understand a TBI kit does not work correctly (false CO sensor reading) with the smog pump. Until now OK I understand why.
I wonder :
1 - Can not TBI be tuned with Smog pump?
2 - Remove the smog pump, it involves changing the cat with 3-way type without air (ok) and plug the holes on the manifold - could I leave connected but make it non-operational?
3 - EGR valve how is it connected to vacuum doors? Is a modified EGR valve required? Com works TBI with EGR valola? If I understand correctly, EGR also influences CO values when reading the TBI system. Why these settings may vary with EGR and not smog pump?
4 - Leaving EGR installed, do I have to leave also active EGR TVS on the air filter box?
5 - It is correct (for greater safety) to update with new purchase of all CTOs (the rear 5-way and the front spark, since it must remove HDC CTO to connect liquid temperature sensor cooling). Which and where can I buy a new CTO 5-door? (3 doors cto I saw sells BJ)
6 - Why I saw many of you montao kit TBI Howell, Fitech, Holley, where time control is not possible? It is clear that the true benefit of a tbi kit is the control of the times, otherwise it becomes a simple electronic carburettor - this I ask for my curiosity and perhaps because something escapes me.
Thanks for helping me to clarify some doubts with some advice. Have patience on my English, I'm getting help from Google translated.
Good Sunday to all of you