1989 Corvette Dieseling Issue
Race Director
Joined: Apr 2002
Posts: 10,036
Likes: 346
From: Anaheim CA
Thread Starter
Advanced
Joined: Feb 2016
Posts: 57
Likes: 1
From: Gainesville Georgia
So far, I've fabricated an ALDL to DB9 cable to hook up to an old laptop I have sitting around. I've installed WINALDL on it but I can't get it to log anything. I've tried different COM ports, and different Baud settings. (2400 vs. 4800) I do know that I have the correct ECM setting selected. I'm thinking I made an error when building the cable so I'll go back and look at that. What's the best place in the car to draw 12v from?
Team Owner
Joined: Jul 2004
Posts: 28,475
Likes: 3,291
From: Hartford WI
Thread Starter
Advanced
Joined: Feb 2016
Posts: 57
Likes: 1
From: Gainesville Georgia
Update
Hi all, sorry for the delay in response there. I've been really busy on other projects. I had gotten the car to a point where it ran pretty well but still not quite perfect. It still hasn't ever done that dieseling problem again so that fix seems to be permanent. 
Meanwhile, I've also replaced the steering wheel, shifter boot, and I redid the seats. The interior looks way better than it did when I bought the car. Now, I've decided to try this data logging again. I bought an ALDL cable online. If I get anything figured out here, I'll be sure to post my findings.
Meanwhile, I've also replaced the steering wheel, shifter boot, and I redid the seats. The interior looks way better than it did when I bought the car. Now, I've decided to try this data logging again. I bought an ALDL cable online. If I get anything figured out here, I'll be sure to post my findings.
Thread Starter
Advanced
Joined: Feb 2016
Posts: 57
Likes: 1
From: Gainesville Georgia
Good news! Using WINALDL combined with my new aldl cable, adjusting the base idle speed using the IAC counts seems to have helped a lot. I can tell a noticeable difference with warm starts. We'll see what happens for cold starts later. This is definitely promising though so let's hope for the best
Racer
Joined: Jun 2010
Posts: 290
Likes: 5
From: Winona MN
Good news! Using WINALDL combined with my new aldl cable, adjusting the base idle speed using the IAC counts seems to have helped a lot. I can tell a noticeable difference with warm starts. We'll see what happens for cold starts later. This is definitely promising though so let's hope for the best
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