Gas cuts out over bumps...?
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Joined: Apr 2009
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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
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
Le Mans Master
Joined: Jul 2007
Posts: 5,043
Likes: 8
From: Tampa Florida
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.
The fuel level sender may need to be cleaned up also but it sounds like you got it all covered though.
Pro
Joined: Nov 2005
Posts: 602
Likes: 0
From: North Bay Ontario
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; May 9, 2010 at 11:20 AM.
