CorvetteForum - Chevrolet Corvette Forum Discussion - C5 Forced Induction/Nitrous

Trouble Shooting Help Request - Supercharged (LS3) C5 Stalls at Startup (Sometimes)

MSG C5 — Mon, 18 May 2026 18:58:14 GMT

Hoping for some troubleshooting help with my 2004 C5 that has a cammed LS3 engine with an A&A supercharger. The engine and system has been in the car for over a year, but over the past month, the car has stalled after start-up and only after I've been driving it. For example, it stalled yesterday after I had stopped for gas. It started fine and idled strong at initial start-up in my garage, but then after driving 10 minutes and stopping for gas, it stalled when I restarted it and tried to move out of park and into drive (A4). It did the same thing last week when I stopped at a hardware store after driving it 20 minutes. However, it doesn't stall at start up or if the car cools down as I drove it on Friday to play golf and the car started and drove fine to and from the course but it was parked for four hours in between.

I checked for codes and the only two that showed were P0l02 and P0103 which are both MAF sensor related, however the performance shop and tuner who helped work the build told me that is common when you add forced induction systems to a stock C5. The check engine light does not come on and the car handles well otherwise. In terms of additional parts, it has a LS2 throttle body, a LS1-LS2 throttle body adapter harness, an OEM Mass Airflow sensor (Part 19220121) with integrated Intake Air Temperature (IAT) sensor, a custom made inline pipe with IAT breakout installed for the Alky Control methanol injection kit although the meth kit only sprays during WOT and was not activated during any of the short drives I took prior to the restart problem,

Hoping someone can walk me through the trouble shooting steps. I've already checked the engine fuse for the starter/ignition, checked hoses for leaks, etc. The car also has an auxiliary oil cooler but the operating temps are all in the target range, especially considering the car was only driven for a few miles before stopping and then stalling at re-restart.

Thanks!

:lurk:

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Does anyone know this APS red vert?

YNOT85 — Thu, 07 May 2026 02:41:18 GMT

I have the opportunity to buy this tomorrow. 427, built 4l60 3.90s etc. No info on turbo sizes or running videos. Hoping someone knows this car or if he was a member on here. Thanks in advance for any info!

F2 Bracket Setup

kromberg — Sat, 02 May 2026 09:37:01 GMT

I am looking for a bracket system for a C5 that will support a F2 with a direct drive option for the F2 and will support a secondary belt for an alternator & vacuum pump. Anyone know of a setup?

Forged 383 with A&A V3 Si + secondary drive

WeaponsGradeTorque — Fri, 01 May 2026 16:06:44 GMT

755 rwhp / 660 rwtq ! (STD). ....
Peak Power at 6700 RPM (will carry out to 7k RPM redline)
10 psi boost (3.8 pulley)....easily could go to a 3.6
8 rib pulley

car also has:
meth injection
BTR LS3 Stage 5 cam
243 heads
headers

The C5 is still alive !!!