Quote:
Originally Posted by basel_520
i was under the impression that the ecu is pretty smart when it came to adjusting fuel air mix sure the stock ecu never does it ur way but it does it some way....i mean the injectors did look identical
so i figured it out...i started disconnecting things one at a time and seeing what would happen...4th try tps that nazi. yanked the tps out and got a 300% improvement....
drove around and now im seriously thinking did they put the tps in there just so it can break then you have to pay toyota for a new one to fix it... i really really dont see why you need one but you can use urs all you want...i cant afford a new one yet...and when i can im buying something else
and i didnt get out of my car IN traffic i was driving up to my friends house to wake him up for school 5 hours early i just took a while to get get there
edit: thanx for the help btw, i was convinced it was mechanical at first
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TPS is important part for the ECU to cauclate load and accel enrichment, keep driving it like that and you will need an new engine eventually, because with an incorrect load, timing and fueling will be off, i am not even sure the ecu will go to closed loop without a TPS, meaning you will run rich, all the time with the upsized injector.
Test your TPS according to the BGB, if its bad replacement is only about 70 dollars from the dealer.
the ECU can compensate for a small amount here and there, not a drastic change, and just that a part looks similar on the outside doesnt mean its the same, injector flow requirment is different between a 2.0L and 1.6, and you can be sure that the engine is running rich. also the injectors could have different resistance value and lag time, these are not air flow sensing device like carburetors, everything is pre programmed into the ecu, with the specific sensor and injectors, if you change one parameter, ie, AFM spring tension, injector size, you just put everything out of range, the pre programmed value in the ECU is no longer valid, so you really cant just swap in some injector from different engines and expect it to perform correctly.
you see a lot of guys swapping bigger injectors in for turbo'd 4age and call it good, and thats a half ass way to tune a car, because you are never on boost 100% of the time you are not using the added capacity of the injector when you are off boost, and thats 80% of the time. over fueling will kill an engine over time by diluting the oil with fuel and wipe out the bearing, and wear out rings.