84 upgrade
Thread Starter
Instructor
Joined: Jun 2018
Posts: 111
Likes: 1
So there have been a few good suggestions on the rich smell. Another thing to check, the oxygen sensor and the thermac. Do the flaps on the air cleaner ever open up?
For the oxygen sensor, there is a way to test it with a paper clip on the aldl connector but that eludes me at the moment. It will also tell you if you're running rich or lean. I'll see if I can dig it up.
The other thing it could be is if the cat is gutted or bad and broken you'll get that smell too.
On the coolant sensor, does the car ever idle down to ~7-800 rpms? It never will if that isn't reading right.
For the oxygen sensor, there is a way to test it with a paper clip on the aldl connector but that eludes me at the moment. It will also tell you if you're running rich or lean. I'll see if I can dig it up.
The other thing it could be is if the cat is gutted or bad and broken you'll get that smell too.
On the coolant sensor, does the car ever idle down to ~7-800 rpms? It never will if that isn't reading right.
Last edited by Radioway; Feb 18, 2019 at 05:47 PM.
Le Mans Master
Joined: Aug 2017
Posts: 6,941
Likes: 1,490
From: New Jersey
Vacuum leaks are easy, using starting fluid just spray around the throttle body bases, the lids and vacuum ports. If you get a sudden rpm change there is an air leak.
For timing, that may be easier to watch a YouTube video on. But I will say this, to get it in base timing mode there should be a tan white with a black stripe by the brake booster with a plug in the middle. Disconnect that before starting.
And before all this, did you disconnect the battery while doing the cap and rotor. If so the high idle may be the fact that the iacs haven't done their relearn yet.
Thread Starter
Instructor
Joined: Jun 2018
Posts: 111
Likes: 1
Yea. You unplug the connector then remove the 4 or 5 torx screws on the top plate and pop it out. Pretty simple.
Vacuum leaks are easy, using starting fluid just spray around the throttle body bases, the lids and vacuum ports. If you get a sudden rpm change there is an air leak.
For timing, that may be easier to watch a YouTube video on. But I will say this, to get it in base timing mode there should be a tan white with a black stripe by the brake booster with a plug in the middle. Disconnect that before starting.
And before all this, did you disconnect the battery while doing the cap and rotor. If so the high idle may be the fact that the iacs haven't done their relearn yet.
Vacuum leaks are easy, using starting fluid just spray around the throttle body bases, the lids and vacuum ports. If you get a sudden rpm change there is an air leak.
For timing, that may be easier to watch a YouTube video on. But I will say this, to get it in base timing mode there should be a tan white with a black stripe by the brake booster with a plug in the middle. Disconnect that before starting.
And before all this, did you disconnect the battery while doing the cap and rotor. If so the high idle may be the fact that the iacs haven't done their relearn yet.
Le Mans Master
Joined: Aug 2017
Posts: 6,941
Likes: 1,490
From: New Jersey
Well, the old adage goes, if it ain't broke then don't fix it. If you're concerned about the fuel smell get it hooked up to a scanner but honestly, a little fuel won't kill it.
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
Safety Car
Joined: Apr 2016
Posts: 4,648
Likes: 1,059
From: N.E. Ohio OH
Finalist 2020 C4 of the Year - Modified
Safety Car
Joined: Apr 2016
Posts: 4,648
Likes: 1,059
From: N.E. Ohio OH
Finalist 2020 C4 of the Year - Modified
Intermediate
Joined: Feb 2017
Posts: 28
Likes: 4
So you live close to Summit Racing then? I'm in Cornersburg, right around the corner form Radioway.
Safety Car
Joined: Apr 2016
Posts: 4,648
Likes: 1,059
From: N.E. Ohio OH
Finalist 2020 C4 of the Year - Modified
So you live close to Summit Racing then? I'm in Cornersburg, right around the corner form Radioway.
Safety Car
Joined: Apr 2016
Posts: 4,648
Likes: 1,059
From: N.E. Ohio OH
Finalist 2020 C4 of the Year - Modified
We go over that way quite often. To the fair, occasionally a Corvette show in Canfield, etc. Once spring gets here and the roads are dry, I'll drive over that way and meet you in the middle somewhere. We can have coffee and I'll hook the scanner on your car and see what we can see. I don't know what all yours will report, but at least we can look for codes and anything else it will tell us.
Thread Starter
Instructor
Joined: Jun 2018
Posts: 111
Likes: 1
We go over that way quite often. To the fair, occasionally a Corvette show in Canfield, etc. Once spring gets here and the roads are dry, I'll drive over that way and meet you in the middle somewhere. We can have coffee and I'll hook the scanner on your car and see what we can see. I don't know what all yours will report, but at least we can look for codes and anything else it will tell us.
