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

Dash fuel problem

Thread Tools
 
Search this Thread
 
Old Nov 3, 2023 | 12:32 PM
  #1  
Acheleon's Avatar
Acheleon
Thread Starter
4th Gear
 
Joined: Nov 2023
Posts: 4
Likes: 0
From: US
Default Dash fuel problem

Just bought a 1986 c4 corvette and i don't think the mpg to range ration is right, any idea on what's going on?
Reply
Old Nov 3, 2023 | 02:14 PM
  #2  
s carter's Avatar
s carter
Melting Slicks
10 Year Member
Liked
Loved
Community Favorite
 
Joined: May 2014
Posts: 2,851
Likes: 579
From: New Port Richey FL
Default

It's a learning process, if you hit reset/ reconnect battery it's dumb. So if you're on a fresh reset and drive like it's stolen hance the 9mpg or if you have a long history of pure idle or driving hard 9mpg.
So reset drive on nice flowing 65/70 mph traffic for 100 miles 27 mpg.

Unlike newer cars that reset when tank is filled these don't so you can have a lifetime average or last 30 seconds


Just a thought could 9.9 be 19.9 a missing digit

Last edited by s carter; Nov 3, 2023 at 02:28 PM.
Reply
Old Nov 5, 2023 | 10:07 AM
  #3  
Incorvettei's Avatar
Incorvettei
Drifting
Photogenic
Liked
Loved
Community Favorite
 
Joined: Oct 2020
Posts: 1,393
Likes: 436
From: Marlton NJ
Default

I had a similar issue so I pulled the fuel pump from the tank, moved the pump unit and saw very little change. Next I opened up the sending unit and cleaned it with WD-40 and Q Tips. Reassembled and it has been working perfectly ever since
Reply

Get notified of new replies

To Dash fuel problem





All times are GMT -4. The time now is 02:52 PM.

story-0
5 Reasons to Upgrade to an LS6-Powered Corvette; 5 Reasons to Stay LT2

Slideshow: Should you buy a 2020-2026 Corvette or wait for 2027?

By Michael S. Palmer | 2026-04-22 10:08:58


VIEW MORE
story-1
2027 Corvette vs The World: Every Model vs Closest Competitor

Slideshow: 2027 Corvette lineup vs the world.

By Joe Kucinski | 2026-04-20 17:58:41


VIEW MORE
story-2
10 Most Common Corvette Problems of the Last 20 Years!

Slideshow: 10 major Corvette problems from the last 20 years.

By Joe Kucinski | 2026-04-14 16:37:05


VIEW MORE
story-3
5 MOST and 5 LEAST Popular Corvette Model Years in History!

Slideshow: 5 most and least popular Corvette model years.

By Joe Kucinski | 2026-04-08 13:25:01


VIEW MORE
story-4
2027 Corvette Buyer's Guide: Everything You Need to Know!

Slideshow: 2027 Corvette buyer's guide

By Joe Kucinski | 2026-04-17 16:41:08


VIEW MORE
story-5
10 Things C8 Corvette Owners Hate (But Won't Tell You)

Slideshow: 10 things C8 Corvette owners hate, but won't tell you.

By Joe Kucinski | 2026-04-01 18:36:07


VIEW MORE
story-6
10 Best Corvettes Coming to Barrett-Jackson Palm Beach 2026!

Slideshow: Should you add one of these incredible Corvettes to your garage?

By Brett Foote | 2026-04-01 18:14:05


VIEW MORE
story-7
Every Corvette Grand Sport Explained! (C2, C4, C6, C7, & C8)

Slideshow: Every Corvette Grand Sport explained

By Joe Kucinski | 2026-03-26 07:13:44


VIEW MORE
story-8
Grand Sport & Grand Sport X Launch Alongside All-New 535hp LS6 V8!

Slideshow: Breaking down the 2027 Grand Sport, Grand Sport X, Stingray, and LS6 V8.

By Michael S. Palmer | 2026-03-26 13:48:45


VIEW MORE
story-9
5 Reasons Bad Drivers Crash & 5 Ways to Avoid a Costly Mistake!

Slideshow: 5 reasons bad drivers crash sports cars & 5 ways to avoid a costly shame!

By Joe Kucinski | 2026-03-25 16:32:55


VIEW MORE