speed bump stalling -or- my problems with fuel pressure
Thread Starter
Melting Slicks
Joined: Jul 2003
Posts: 2,194
Likes: 0
From: Tempe AZ
speed bump stalling -or- my problems with fuel pressure
Just recently my Vette has been exhibiting brief hesitations during accelerations from complete stops, plus I've definitely noticed that every time I go over a speed bump (very slowly of course) after the front wheels come down the engine almost stalls no matter how gentle you take the bump. This can even happen while going over train tracks. hitting little road bumps, etc. The engine has never actually "quit", but sometime it comes real close. I have a Summit fuel pressure gauge in the engine compartment. Lately it sometimes has been as high as 7, or can drop as low as 1, and you can see the fluctuations as the engine idles. I have an electric fuel pump that was installed by the previous owner, but I don't know the manufacturer. I'm assuming that it's the fuel pump that's causing the anomalies, but again, I'm no mechanic, so could there be any other likely cause for this? Anything else I should consider before just replacing the pump? Thanks! Oh yea, the fuel filter was cleaned recently.
Drifting
Joined: Jan 2002
Posts: 1,500
Likes: 0
From: N.Y
Re: speed bump stalling -or- my problems with fuel pressure (Corvette_fetish)
Your fuel pressure should be 5 to 7 psi and steady. if not it can be faulty regulator or pump. As far as the stalling over bumps goes it souds like the fuel level is to high in the carb . what typ of carb,fuel pump,and regulator are you using?
Thread Starter
Melting Slicks
Joined: Jul 2003
Posts: 2,194
Likes: 0
From: Tempe AZ
Re: speed bump stalling -or- my problems with fuel pressure (78 Vette)
Your fuel pressure should be 5 to 7 psi and steady. if not it can be faulty regulator or pump. As far as the stalling over bumps goes it souds like the fuel level is to high in the carb . what typ of carb,fuel pump,and regulator are you using?
Race Director
Joined: Apr 2000
Posts: 17,665
Likes: 194
From: Who says "Nothing is impossible" ? I've been doing nothing for years.
Re: speed bump stalling -or- my problems with fuel pressure (Corvette_fetish)
I just fixed a similar problem with mine, the secondary floats were too high, also I don't trust those fuel pressure gauges mine starts at 6psi and drops to 0psi when warmed up. Check the floats, adjust front so gas is lapping at the sight hole and do the same with the back then turn the back down one full turn. :D
