9th injector delete
Thread Starter
Racer
Joined: Feb 2005
Posts: 338
Likes: 49
From: Quincy,Illinois
9th injector delete
I am removing the 9th injector on my 86. If I cut the wires for the injector connector and the thermo time switch, can i just cap them in the harness, or will I need to connect them? Would that close a circuit back to the ecm?
Safety Car
Joined: Mar 2003
Posts: 3,583
Likes: 504
From: Indianapolis IN
Finalist 2020 C4 of the Year - Unmodified
C4 of Year Finalist (stock) 2019
The cold start injector is not tied to the ECM. You can unplug the injector and call it done. No cutting, no capping, no re-wiring required. That injector is tied directly to the cold start thermal switch and nothing else. You don't even have to unplug the thermal switch.
Thread Starter
Racer
Joined: Feb 2005
Posts: 338
Likes: 49
From: Quincy,Illinois
The cold start injector is not tied to the ECM. You can unplug the injector and call it done. No cutting, no capping, no re-wiring required. That injector is tied directly to the cold start thermal switch and nothing else. You don't even have to unplug the thermal switch.
Safety Car
Joined: Mar 2003
Posts: 3,583
Likes: 504
From: Indianapolis IN
Finalist 2020 C4 of the Year - Unmodified
C4 of Year Finalist (stock) 2019
You're welcome. 
I sent you a PM about the thermal switch. If you are going to physically remove it I would be interested in taking it off of your hands and keeping as a spare for my '86.
I sent you a PM about the thermal switch. If you are going to physically remove it I would be interested in taking it off of your hands and keeping as a spare for my '86.
Team Owner
Joined: Jul 2004
Posts: 28,472
Likes: 3,290
From: Hartford WI
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
Top 10 Most Expensive Corvettes Ever Sold on Bring A Trailer
Brett Foote
10 Things Every Corvette Owner Needs (2026 Edition)
Michael S. Palmer
8 Most "Only Corvette Owners Understand" Quirks and Problems
Pouria Savadkouei
10 Reasons the C6 Z06 is Still A Performance Benchmark After 20 Years
Joe Kucinski
How Much Horsepower Every Corvette Engine "LOST" in 1972
Joe Kucinski
Top 10 DOs and DON'Ts for Protecting Your Convertible Top!
Michael S. Palmer
Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!
Joe Kucinski
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter
Joe Kucinski
8 Coolest Corvette Pace Cars (and Replicas) of All Time
Verdad Gallardo
Team Owner
Joined: Jul 2004
Posts: 28,472
Likes: 3,290
From: Hartford WI
Interesting. It has been said to cause longer crank times unless you reprogram the ECM to squirt more fuel at starting to compensate for the loss of the 9th injector. Supposedly it is more evident in cold weather as opposed to warm or hot.
So what's the function of the injector then?
So what's the function of the injector then?
Last edited by aklim; May 4, 2020 at 10:08 AM.
Melting Slicks
Joined: Jun 2011
Posts: 2,383
Likes: 385
From: Leland , North Carolina
Interesting. It has been said to cause longer crank times unless you reprogram the ECM to squirt more fuel at starting to compensate for the loss of the 9th injector. Supposedly it is more evident in cold weather as opposed to warm or hot.
So what's the function of the injector then?
So what's the function of the injector then?
Melting Slicks
Joined: Jun 2011
Posts: 2,383
Likes: 385
From: Leland , North Carolina
I just deleted mine ,snipped the wires and taped the ends and tucked in side the harness.
Safety Car
Joined: Mar 2003
Posts: 3,583
Likes: 504
From: Indianapolis IN
Finalist 2020 C4 of the Year - Unmodified
C4 of Year Finalist (stock) 2019
Interesting. It has been said to cause longer crank times unless you reprogram the ECM to squirt more fuel at starting to compensate for the loss of the 9th injector. Supposedly it is more evident in cold weather as opposed to warm or hot.
So what's the function of the injector then?
So what's the function of the injector then?
Team Owner
Joined: Jul 2004
Posts: 28,472
Likes: 3,290
From: Hartford WI
I think there's a misunderstanding here. I have my cold start injector hooked up. I was simply letting the OP know how these things are hooked up, and that they are independent of the ECM. I'm very aware of the longer cold start times if you delete the injector, and that's why I'd never remove mine. I turn the key when cold and it hits immediately.