Ecotec LSJ maintenance items:
- check if your electric water pump is working for the intercooler. Common for these to wear out
their brushes.
Replace the timing chain
guide bolt with a
Dorman bolt.
If the stock bolt is broken off:
- your cam chain is stretched, and needs replacing. Sprockets too.
- you should probably drop the pan, fish the broken parts out of the bottom of the pan. I had the broken bolt, and plastic from the broken cam chain guides.
If your timing chain tensioner has a
flat top, replace it with a tensioner with the new design, bump top.
Performance items:
I bought HP Tuners, and have been learning my engine.
HP Tuners showed me that I was getting bad data from a $25 MAP sensor. Replacing that gave me a noticeable performance gain. 30% to 50% gain?
HP Tuners showed me the stock injectors (32lb green injectors) are at 100% duty cycle at the stock redline.
So if I do any performance upgrades, I need bigger injectors. With bigger injectors, I can raise the stock 6500 RPM redline to 7200, as I have heard the stock valvetrain is good for that. Also can tune the engine for E85 fuel, and gain some performance, so double win with injectors.
I have bought
- 82lb Bosch EV14 injectors (These might be too big for idle... but I am hoping the split spray and Bosch technology allows it to idle)
- 2.9" pulley (for 93 octane) and a 2.7" pulley (for E85), a bigger idler pulley to help use up some of the extra slack in the 6 rib belt.
- balance shaft delete parts.