Gas cuts out over bumps...? - CorvetteForum - Chevrolet Corvette Forum Discussion

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

Gas cuts out over bumps...?

Reply

 
 
 
Old 05-09-2010, 10:25 AM
  #1  
aspeters
CF Member
Thread Starter
 
aspeters's Avatar
 
Member Since: Apr 2009
Posts: 70
Thanks: 0
Thanked 0 Times in 0 Posts
Default Gas cuts out over bumps...?

Hi - started having an issue with my '92 street/track car. When going over a bumps in the road, occasionally the car stops accelerating and the "Service Engine Soon" light flickers on. I lift off the gas, and a second later everything is fine.

Separately from this, on the last fillup, my gas gauge went up to full, but the "Miles to Empty" did not change; the dash computer now flickers with SYS.

Possible causes: At my last trackday, I got a bad batch of gas that I think had water in it; so had to add some drygas.

I also did a few laps at less than half a tank, and started getting some lag when accelerating out of corners, ie fuel starvation. Only after the session did I learn the engine goes lean and could get damaged.

Possible ideas: Fuel filter is clogged from the water/drygas; fuel pump and or sock are ruined from starvation; fuel pump wiring is old and the vibrations make the connection come loose; or, sending unit has gone bad.

Possible solutions: I already ordered a new filter and a Walbro 190lph pump kit that includes wiring harness. Any other thoughts?

Thanks for the help,
Andy
aspeters is offline  
Reply With Quote
Old 05-09-2010, 10:56 AM
  #2  
engle1147
CF Senior Member
Support Corvetteforum!
 
engle1147's Avatar
 
Member Since: Jul 2007
Location: Tampa Florida
Posts: 5,043
Thanks: 0
Thanked 1 Time in 1 Post
Default

Order a new gasket for the fuel tank: http://www.ecklers.com/product.asp?p...&dept%5Fid=239
The fuel level sender may need to be cleaned up also but it sounds like you got it all covered though.

engle1147 is offline  
Reply With Quote
Old 05-09-2010, 11:17 AM
  #3  
pletzvet
CF Senior Member
 
pletzvet's Avatar
 
Member Since: Nov 2005
Location: North Bay Ontario
Posts: 602
Thanks: 0
Thanked 0 Times in 0 Posts
Default

Fuel filters are cheap and always a good idea to keep fresh, however a new fuel pump doesn't fit the same criteria - unless you were considering doing fuel pump upgrade anyway. I'd be checking for a loose ground, broken/pinched wires or loose connections everywhere. Symptoms sound more electrical than fuel related to me. Also, since your SES light is coming on - you might have some stored codes that could be enlightening, so I'd recommend checking for stored codes. Just my $.02.

Last edited by pletzvet; 05-09-2010 at 11:20 AM.
pletzvet is offline  
Reply With Quote
Old 05-10-2010, 08:45 AM
  #4  
aspeters
CF Member
Thread Starter
 
aspeters's Avatar
 
Member Since: Apr 2009
Posts: 70
Thanks: 0
Thanked 0 Times in 0 Posts
Default

Thanks for the tips, will let ya know how it goes.
aspeters is offline  
Reply With Quote

Thread Tools
Search this Thread
Quick Reply: Gas cuts out over bumps...?


Sponsored Ads
Vendor Directory

Contact Us Archive Advertising Cookie Policy Privacy Statement Terms of Service

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.
 
  • Ask a Question
    Get answers from community experts
Question Title:
Description:
Your question will be posted in: