thewanderlustking Posted March 20, 2025 Posted March 20, 2025 Is the “cheat code” for adjusting timing on a 1994 3VZE the same as the 22RE? I wasn’t getting any timing change between jumper and pulling jumper out. And the timing wasn’t stable/locked. So is this the same deal where I need to loosen the TPS first? The FSM doesn’t mention this and I didn’t find any procedures online mentioning it either… Quote
extech Posted March 20, 2025 Posted March 20, 2025 newest info i have is for 89. it says the same thing as on the 22. t to e1, pull the throttle back towards idle to see if timing stabilizes. Quote
thewanderlustking Posted March 23, 2025 Author Posted March 23, 2025 (edited) Well no matter what I did, the timing was a bit "bouncy"... But loosening the TPS and turning it back defiantly made it bump down. I couldn't get the timing change between jumper in/out. Although its also hard to see a 2 degree change when its not a rock steady flash anyways. Whatever the case, the truck was not timed correctly. It is super sensitive to the TPS position, and idle air speed. Jumper in, loosening the TPS, adjusting the idle to 800rpm (per the timing light), adjusting timing to 12, adjusting idle back, checking timing again... I was able to get it happy and then crank the timing gun advance to 12 to verify on the zero mark. For whatever reason this seems to steady the timing flash. But it also gave me a clearer reference to look at. Truck is running pretty good now! Three LONG loops around the neighborhood with zero hiccups, burps, misfires, or backfires. Before I was only making it about halfway through the short loop, and then barely making it back. I'm actually looking forward to playing around with timing via a laptop/MegaSquirt. This engine starts to come alive at 12, and I suspect a little more would make it even happier. I am not sure what it was actually timed at, but it was WAY advanced because the idea was too high. I am likely going to have to revisit this soon after a bit of a "break in" period on the heads. The valves sounded a bit noisy, compared to before. I am likely going to need to adjust them, then I will pop a light back on it. Edited March 23, 2025 by thewanderlustking Quote
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