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97 5.7L Vortec, Timing advance connector C/K Car Forums . Ok, I have read that thread and many more on this forum and still cannot verify if the 1997 vortec 5.7L has an EST wire, i.e. the brown wire w/black trace that the computer uses to advance the timing by whatever means. Feb 08, 2009 · When timing newer engines you set it at base timing 0 with the distributor pointing to #1 plug and it should fire, the computer will adjust the timing as needed up to 50 degrees one way or the other, make sure all vacuum hoses are in good shape. And make sure the vacuum tree is not leaking. 43 Vortec Engine Chevy 4.3 v6 firing order and wire placement Requesting the Firing Firing Order 43 Vortec Engine - amsterdam2018.pvda.nl Generally, the firing order for a Chevy (L) is 1–8–4–3–6–5–7–2. Jan 13, 2016 · One of the biggest breakthroughs was the development of variable valve timing (VVT), a new system that utilized advanced (for the time) electronic technology to apply variable electronic signals ... Jan 18, 2018 · You could make up for the EGR with higher ignition timing at cruise speeds. I haven't done it on a older 5.7 but several times on 3800's that run EGR and early model LS trucks that ran EGR from 99-01. I see no problem removing it. As a result, usually more ignition timing is needed. The amount of increased timing for alcohol fuels is very dependent on the amount of enrichment. More enrichment of alcohol fuels usually needs more ignition timing. Example: For blown gasoline at around 2 atmospheres, 28 degrees of ignition timing is common for best power. For the same blown ... Holley 21-152 Timing Chain Cover 1996-Up EFI Small Block Chevy Vortec With Crank ... SBC Small Block Chevy Gasket Kit Gaskets Sbc 5.7 305 Vortec 350 86-93 1pc Rear ... Rickracer ASE Certified Master Automotive Technician (well over 4 decades of experience, ) '93 S10 SB,RC, Comp XR276 Hydraulic Roller, Vortec head 363, 400 + hp, built 700R4, JW 2800 stall lockup converter, 3.73 posi, disc brake, narrowed 8.8 Exploder rear, LS Camaro front discs, Cal-Trac clone traction bars, Best N/A passes to date: 7.76 in the 1/8th, [email protected] mph in the 1/4, gonna spray ... I hooked up a timing gun and when the car is fully warmed up it reads about 5-7 degrees ahead of tdc. If I unplug the vacuum line from the EZL, the ignition does not change. Moving the distributor doesn't affect timing. You could have weak spark, causing the rough running and occasional stalling, but it...We have 2 Indmar 5.7L Vortec manuals available for free PDF download: Operator's Manual ... Ignition Timing. 63. Fuel System. 64. Carburetor Adjustments. 64 ... Dec 25, 2007 · Re: 96 vortec 5.7 timing questions the timing can be adjusted but not in the traditional manner and not for performane. On my 98 305 I pulled the dist for an intake gasket job and while putting the dist back in, the tabs that hold the cap on broke. Jul 14, 2020 · The ignition timing of the 1999 4.3l Vortec engine is not adjustable with traditional methods. In older engine designs, rotating the distributor caused the spark to fire earlier or later, changing engine timing.