Is 12v mod required (TT denso)
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Is 12v mod required (TT denso)
Hey all,
I searched but could not come up with a definitive answer. When upgrading to a TTdenso pump is the 12v mod required in order for the car to run ?
I installed the pump yesterday and the car would not start until I did the 12v mod.
I really did not want to do this since I would like to keep the dual mode operation.
I searched but could not come up with a definitive answer. When upgrading to a TTdenso pump is the 12v mod required in order for the car to run ?
I installed the pump yesterday and the car would not start until I did the 12v mod.
I really did not want to do this since I would like to keep the dual mode operation.
#4
12V mod
There is no reason it shouldn't operate fine on the lower voltage. I'd check to be sure that the FP ECU is in fact putting out any voltage at the low setting.
However, you say you've already done the mod. I wouldn't worry about it. I've run my pump continuously at the 12V setting for several years, and never experienced a problem with it.
However, you say you've already done the mod. I wouldn't worry about it. I've run my pump continuously at the 12V setting for several years, and never experienced a problem with it.
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The biggest thing is the noise for sure and running the pump like that is pretty needless for my goals at this point. Anyone know if the supra tt fuel computer will work in our cars ?
#10
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bingo, any position but off. doesn't bother me much cause I either am sitting there with the engine running to let it cool down some or I just turn it off. you could run a relay to turn it on only when the engine is on. do a search for the wiring diagram.
Last edited by Ali SC3; 03-22-10 at 10:08 AM.
#12
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YeA 2jZ
ok but lets say i am waiting on someone and i am listening to the radio engine off would and is the pump actually pumping fuel into the engine or is it just active ???
ok but lets say i am waiting on someone and i am listening to the radio engine off would and is the pump actually pumping fuel into the engine or is it just active ???
#13
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it goes from the pump through the rail and back from the return line.
Since your engine is off the injectors are closed, so no fuel gets into the engine.
most cars have a fuel pump prime of a few seconds, where the pump comes on to pressurize the system, just think of it as a long priming. no biggie.
The 1 dangerous situation I could think of is if something happens (accident or something) that causes your car to spring a fuel leak. normally this would cause the engine to die (lack of fuel) and when the engine shuts off so does the pump.
with the 12v mod, you would have to still pull the key out, and then it would still pump fuel for another 5 seconds or so. as unlikely as this is it can be avoided with the use of the stock fuel ecu as a trigger to a relay which gives 12v to the pump.
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