C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

85 dies while idling in Drive

Thread Tools
 
Search this Thread
 
Old Apr 3, 2007 | 05:55 PM
  #1  
c4_4ya's Avatar
c4_4ya
Thread Starter
Pro
20 Year Member
 
Joined: Dec 2000
Posts: 555
Likes: 2
From: RDU NC
Default 85 dies while idling in Drive

Greetings, I noticed a couple of months ago that my 85 would hesitate, but very seldom. Yesterday I drove around town, and while idling at a light, it died. Just like killing it with the key... no stumbling, no erratic idle, no error codes. It would start right back up. I could not get it to die while idling in P or N, and it wouldn't die while driving. It runs perfectly otherwise... any ideas?

I rebuilt the TPI 6 or 8 months ago, new FMS injectors, new vacuum lines and afpr with new diaphram. Fairly new fuel filter. It has an MSD blaster coil that's 6 years old, the 6AL totally crapped out 2 years ago.
Old Apr 3, 2007 | 08:44 PM
  #2  
Midnight 85's Avatar
Midnight 85
Le Mans Master
15 Year Member
 
Joined: May 2004
Posts: 5,866
Likes: 60
From: Hellinois
Finalist 2020 C4 of the Year - Modified
Default

Did you reset the minimum air idle adjustments?
Old Apr 3, 2007 | 08:45 PM
  #3  
quiksilver458's Avatar
quiksilver458
Melting Slicks
15 Year Member
 
Joined: Apr 2002
Posts: 2,546
Likes: 0
From: Orlando FL
Default

Did you test the throttle position sensor "TPS"?
Old Apr 3, 2007 | 09:50 PM
  #4  
c4_4ya's Avatar
c4_4ya
Thread Starter
Pro
20 Year Member
 
Joined: Dec 2000
Posts: 555
Likes: 2
From: RDU NC
Default

I removed the TB as a whole, didn't mess with the IAC or the TPS. But I should recheck them anyway I guess. Would either of them cause the car to just shut off?

I had it idling (fairly steady) in Drive at 540-550 RPM for several minutes before it died the first time, then again after about 2-3 minutes of idling just fine. Then again after just a few seconds of waiting for a car to turn in front of me. Then it was fine the rest of the 5 mile drive home.

Almost seems ignition related as fast as the car dies, then immediately fires right back up! Any other ideas?
Old Apr 4, 2007 | 07:48 AM
  #5  
mk842766's Avatar
mk842766
Pro
 
Joined: Aug 2000
Posts: 666
Likes: 0
From: Richmond TX
Default

Originally Posted by c4_4ya
I removed the TB as a whole, didn't mess with the IAC or the TPS. But I should recheck them anyway I guess. Would either of them cause the car to just shut off?

I had it idling (fairly steady) in Drive at 540-550 RPM for several minutes before it died the first time, then again after about 2-3 minutes of idling just fine. Then again after just a few seconds of waiting for a car to turn in front of me. Then it was fine the rest of the 5 mile drive home.

Almost seems ignition related as fast as the car dies, then immediately fires right back up! Any other ideas?
Ignition module....they get hot and shut down. Either have it checked at Autozone(they said mine was good, when in fact it was fried!), or replace...easy job.
Old Apr 4, 2007 | 08:13 AM
  #6  
onedef92's Avatar
onedef92
Team Owner
20 Year Member
 
Joined: Oct 2000
Posts: 96,443
Likes: 9
From: Fort Knox, KY
Cruise-In IV Veteran
Cruise-In VI Veteran
Cruise-In VII Veteran
Cruise-In VIII Veteran
Default

Check and replace your PCV valve, too. Many people forget this routine tune-up item but it can cause idle problems, too.

Get notified of new replies

To 85 dies while idling in Drive





All times are GMT -4. The time now is 02:20 AM.

story-0
10 Ugly Corvettes That We Still Kinda Love

Slideshow: 10 ugly Corvettes that we still kinda love.

By Joe Kucinski | 2026-06-03 10:34:17


VIEW MORE
story-1
Top 10 Most Expensive Corvettes Ever Sold on Bring A Trailer

A lot of money has changed hands at the online auction house over the years.

By Brett Foote | 2026-06-03 10:21:50


VIEW MORE
story-2
10 Things Every Corvette Owner Needs (2026 Edition)

Slideshow: 10 great gifts Corvette enthusiasts actually want for Father's Day!

By Michael S. Palmer | 2026-06-03 15:43:40


VIEW MORE
story-3
8 Most "Only Corvette Owners Understand" Quirks and Problems

Slideshow: These are the quirks, annoyances, and oddly lovable problems that every Corvette owner eventually learns to live with.

By Pouria Savadkouei | 2026-05-28 09:31:39


VIEW MORE
story-4
10 Reasons the C6 Z06 is Still A Performance Benchmark After 20 Years

Slideshow: 10 reasons why the C6 Z06 is still a performance benchmark after 20 years.

By Joe Kucinski | 2026-05-27 17:20:09


VIEW MORE
story-5
How Much Horsepower Every Corvette Engine "LOST" in 1972

Slideshow: How much horsepower every Corvette engine lost in 1972.

By Joe Kucinski | 2026-05-27 16:54:53


VIEW MORE
story-6
Top 10 DOs and DON'Ts for Protecting Your Convertible Top!

Slideshow: How to Protect A Convertible Top: 10 DOs & DON'Ts

By Michael S. Palmer | 2026-04-03 00:00:00


VIEW MORE
story-7
Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!

Slideshow: The 10 most explosive Corvettes ever built based on power-to-weight ratio.

By Joe Kucinski | 2026-05-20 07:23:03


VIEW MORE
story-8
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter

Slideshow: From C1 to C8 we compare every Corvette generation by the numbers.

By Joe Kucinski | 2026-05-12 16:54:12


VIEW MORE
story-9
8 Coolest Corvette Pace Cars (and Replicas) of All Time

Slideshow: Some Corvette pace cars became collectible legends, while others perfectly captured the look and attitude of their era.

By Verdad Gallardo | 2026-05-11 09:50:51


VIEW MORE