Lingenfelter Fuel Pump

[Bob Eyres]

Originally Posted by dredgeguy

Bob,
You only get the two fuel pumps with the socks for $200. You can get replacement fuel pumps with the socks for about $25 each from RockAuto.

This is what I did. After removing the whole assembly it looked to be in good shape, so we replaced just the pumps with the RockAuto units,(listed on their site as replacements for 91' Corvette 5.7 liter DOHC engine), it has ten pounds more pressure now and runs great. Also replaced the in- line fuel filter too.

Note: Although the car started and ran when those old pumps were running with low pressure, it did not crap out completely. So this led me to believe that it might not be the pumps. (this problem crept up on me, getting worse over time )
But installing two fresh pumps cured another problem that I've had for years, long cranking at start up. The starter always worked for 5-10 seconds before the engine fired.
With the new pumps in there, it fires up immediately when you turn the key.
So, if any of you guys have an LT5 that takes a long time to spark up, even though it "seems to run ok", check the fuel pressure, a feeble fuel pump may be the cause.

BTW, thanks for all the advice, this is a great forum.