TBI problems after changing injectors

[Bent77]

Depends on the harness, some years it’s brown with a black trace, some years gray w/ black trace IIRC

unplug
Start
Set timing
Shut off
Reconnect

 

[Bent77]

87-91 TBI wiring Diagrams

TBI wiring diagrams for 1987 to 1991 C/K/V/R trucks. 1 to 5

ck5.com

 

[bp71k5]

Yep saw that on some you Tube videos, there was an insert with the dizzy that talked about 6 degrees for 88 - 91 firebird, but I did some research before I trusted it.

So can I unplug the small connecter at the dizzy or do I have to be able to just disconnect the one wire in that connector? The brown wire goes directly into a wire loom, I haven't looked yet to see if there is something under the dash with a disconnect for it. It's a Howell harness with the computer. Time to hunt my wiring diagrams.

The stock tbi has a connector kinda close to the distributor. I’d think Howell did the same thing.

 

[6872xtc]

Just an FYI, I did 2* on mine at 5K altitude.

 

[70jimmy]

Eagle Mark is still helping people from Heaven.

Interesting the vid I watched showed it on the 2 prong connector, but those diagrams, my manuals, and my manual from Howell all show it in the 4 prong connector. I will have to look at it again tomorrow in the daylight.

texted a former co-worker to borrow a timing light so he will drop it off tomorrow.

 

[Wes Harden]

you have RAM horn exhaust manifolds on a tbi motor? Ram horn spark plug wires are much longer then log type manifold wires. Ram horn wires path between the heads and firewall, come up from below to spark plugs. The front wires are clipped to block near exhaust pipe. I haven't looked for ram horn wires in while I'm sure there out there.

 

[imiceman44]

I do not like asking my wife to help me with my truck. Any time I ask her to help me with my truck she just starts whining, and saying things like "How long is this going to take?", or "I'm busy can't we do this later". I just gave up and don't bother asking anymore.

That's my wife.
Even on her car.

 

[70jimmy]

Ok found the right wire that had a disconnect plug under the hood, set timing, road test runs good and smooth, still not great for power but normal for TBI. I am gonna drive it back and forth to work a few times to road test it more, time to start cleaning, organizing, and packing, along with bolt and nut check normal checkover stuff.