California Emissions

[cal2200]

Its a tad bit aggravating when people act like you havent thought of just leavung it off or unplugging it. I know its possible to bypass this system. I know its legal to remove this ive checked. Also i keep repeating mtself because if someone says try just unplugging it or not using it all i can do is repeat myself by saying ive tried it and thr truck with not start without it. This distributor is only made for a 305 and i noe have a 350 and would prefer to replace this distributor with one rated for a 350. There are no 350 distributors containing both.

[zieg85]

Without seeing your setup and from reading and re-reading your posts you are probably not going to find a solution without further understanding what others are saying.  First off there is really no difference in "ratings" if a 305 versus a 350 Distributor.  It only differs as to what curve, what type of advance mechanisms and whether it is for ESC or not.  You could drop a 1970 points distributor from any small block and you could get it going.  Maybe you are possibly overthinking this.  Sorry if you are getting frustrated...

[bd]

You may have to tweek the advance curve for best engine performance:  SBC HEI distributors on Ebay.

[bd]

The problem you're facing is that the '86 engine has a California feedback emissions system.  Fuel and ignition timing are managed by an onboard computer (ECM).  To accomplish your goal of removing the emissions system would require replacing the carburetor and substituting a mechanical distributor, such as one of those linked in the prior post.  In addition, you would need to remove the ECM, catalytic converter, etc, etc, etc.  Quite an endeavor.

[timthescarrd]

I understand these kind of problems can be frustrating.  So first and most importantly,

is this TBI or Carb? If carb, is it computer controlled?

As far as the distributor, no you can't just unplug it, but by cutting and splicing some of the wires to the computer you can trick it into running without the computer.

"First thing to do is unhook the spark control computer lead from the pink wire and hook the pink wire directly to the dist. cap.  Make sure you plug it into the cap at the BAT terminal.  The second thing is to locate the 4 wire connector that feeds into the ignition module.  There's a brown (D), green (C), white (B), and black (A) wire there.  The letters in () are on the black clip that the wires come out of.  You cut the green (C) and black (A) wires between this clip and where they go into the distributor.  Then all you need to do is solder the 2 cut leads from the dist/ignition module together, i.e. the green and black ones"

Or replace the distributor with a non-ESC

[cal2200]

I'm trying to replace this distributor with one that only has vacuum and is meant for a 350. So, it wont have the plug for me to solder the wires into. I will only have the plug coming from the firewall. And mine is meant for a 305, plus I don't want to run a brand new engine with an old distributor.

[VileZambonie]

You have an ESC distributor with vacuum advance like in the attached pic. You want to run a standard vacuum advance HEI Distributor and a non computer controlled carburetor correct?

So purchase a new vacuum advance HEI distributor for a SBC
Purchase and Edlebrock 1406 electric choke carburetor

Get some wire, solder and heat shrink to make a few simple electrical connections ie female spade for electronic choke, distributor coil wire connector and then adjust your ignition timing, tune the carburetor.

Remove the exhaust emissions controls and plug the evap canister and you will have bypassed all California emissions controls

[bd]

Vile, because it's a California truck a 1986 K10 could easily be an LS9 350 with feedback carburetor.  My recollection isn't totally untarnished, but isn't ESC controlled by the ECM on CCC engines?  And, will the ESC bypass still work under those circumstances without setting a code?

[VileZambonie]

BD I didn't put much effort into reading this post since it's missing a lot of information but I thought he said it was a 305 with ESC w/ vacuum advance and he replaced it with a 350. Maybe I read it wrong but I'm not going to look back. Either way I'm under the impression he is looking to run a non emissions controlled truck, no? Got projects to do and progress to make.... have a good night