Lost the Low side pump

TJay74 · 08-15-2019, 07:48 PM

I felt like power was down some. I noticed it right after I went to the 1/4 mile track, I blew it off thinking it as from only having 1/2 tank of gas. Then a couple of weeks ago I noticed that on WOT runs after the car crossed 5700rpms the power dropped off.

I got my HPT out and logged it and sure enough, my hunch was right. Power was dropping off, fuel pressure on the low side was tanking around 5500rpm and down to 25psi eventually.

Went ahead and replaced the low side pump, took the car out and i can now say, "Captain, this is Scotty. I am giving you all she's got..."

The power is back and running great now. Made some adjustments to the tune and hopefully wont see this happen again.

Watch the low side on your force induction rides peeps, it is doesnt feel right log it and make sure before you push them too hard and cause any damage.

Joshinator99 · 08-15-2019, 08:37 PM

Glad you caught it before anything went boom inside your engine...! Are you running a voltage booster on your low-side pump? Just wondering.

TJay74 · 08-15-2019, 10:31 PM

Yes, I have the JMS box on it. It was setup per the instructions and checked several times. I turned it down to 16.25v for now and adjusted the voltage in the tune. So far the pressure it holding at the correct points now.

08-15-2019, 07:48 PM	#1
TJay74 Drives: 17 Camaro SS 1LE & 16 Sierra AT CC Join Date: Nov 2016 Location: Norman, OK Posts: 2,424	Lost the Low side pump I felt like power was down some. I noticed it right after I went to the 1/4 mile track, I blew it off thinking it as from only having 1/2 tank of gas. Then a couple of weeks ago I noticed that on WOT runs after the car crossed 5700rpms the power dropped off. I got my HPT out and logged it and sure enough, my hunch was right. Power was dropping off, fuel pressure on the low side was tanking around 5500rpm and down to 25psi eventually. Went ahead and replaced the low side pump, took the car out and i can now say, "Captain, this is Scotty. I am giving you all she's got..." The power is back and running great now. Made some adjustments to the tune and hopefully wont see this happen again. Watch the low side on your force induction rides peeps, it is doesnt feel right log it and make sure before you push them too hard and cause any damage. __________________ 2019 Corvette Z06 2LZ A8 - Halltech CAI, AWE non-catted X-pipe, Mamo V2 ported TB 592rwhp, bone stock 566rwhp 2017 Camaro SS 1LE - Procharger D1SC w/ Tial 2" BOV & Race intercooler / ARH full length catless headers / Alky meth injection system - 650rwhp on conservative tune SOLD

08-15-2019, 08:37 PM	#2
Joshinator99 Drives: 2017 Camaro 2SS A8 Join Date: Aug 2018 Location: Petersham MA Posts: 4,749	Glad you caught it before anything went boom inside your engine...! Are you running a voltage booster on your low-side pump? Just wondering. __________________ 2017 Chevy Camaro 2SS A8 Whipple 3.0, Mast Black Label heads, Fore triple in-tank pumps, 112mm TB, LPE +52% injectors, LPE BB HPFP, 15” conversion *1059 WHP/944 WTQ, 9.48@150*

08-15-2019, 10:31 PM	#3
TJay74 Drives: 17 Camaro SS 1LE & 16 Sierra AT CC Join Date: Nov 2016 Location: Norman, OK Posts: 2,424	Yes, I have the JMS box on it. It was setup per the instructions and checked several times. I turned it down to 16.25v for now and adjusted the voltage in the tune. So far the pressure it holding at the correct points now. __________________ 2019 Corvette Z06 2LZ A8 - Halltech CAI, AWE non-catted X-pipe, Mamo V2 ported TB 592rwhp, bone stock 566rwhp 2017 Camaro SS 1LE - Procharger D1SC w/ Tial 2" BOV & Race intercooler / ARH full length catless headers / Alky meth injection system - 650rwhp on conservative tune SOLD

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