Good morning All,
Last couple of months i've been rebuilding my MR2, Few upgrades along the way but I've appeared to hit a wall with getting my car to rev up.
Its a gen2 engine, I've just had it forged & decided at the time it would be a good idea to move everything over to a gen3 loom ecu injectors + sensors & the ignitor.
The car will fire up and idle fine. 850rpm and its just purring, Open the throttle and its really struggles to get over 1100rpm.
Now my garage has been through the loom and confirmed that all of the pins match to where they should be going to, However there are 2 pins on the loom/ECU that are causing the problem.
VTA2 - Seems to be going to a 4 pin plug thats not been used to the right hand side of the throttle. Wire on loom is Green/red
VC - this is going into the TPS 4 pin. Wire on loom is red/blue.
Now i was reading else where that VTA2 & VC should be bridged ive tried this and still no joy. I cant make my mind up if the wiring is correct or there an issue with the MAP sensor / ECU.
Is there something simple im missing? Just really need some rev's.
[Mk2] [Turbo] Gen2 to Gen3 loom swap, Help please not revving
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Re: [Mk2] [Turbo] Gen2 to Gen3 loom swap, Help please not revving
ok the code on the resistor should be 2R2J 1W im not sure what the replacement is for this
Re: [Mk2] [Turbo] Gen2 to Gen3 loom swap, Help please not revving
2R2J 1W should mean you are looking for a 2.2ohm 5% (tolerance) 1watt resistor, which checks out with the resistance measured on a ecu sat on my desk with similar blown caps and damaged tracks.
It always seems to be the 10mf caps that go, and there's another of these on the smaller PCB so even if that isn't leaking at he moment you might want to change that at the same time. Both were leaking in my 93 ECU.
Paul
It always seems to be the 10mf caps that go, and there's another of these on the smaller PCB so even if that isn't leaking at he moment you might want to change that at the same time. Both were leaking in my 93 ECU.
Paul
Re: [Mk2] [Turbo] Gen2 to Gen3 loom swap, Help please not revving
Thanks for getting back to me paul, thats answered my question, Looks like ill be hitting up maplins on the way home.
Re: [Mk2] [Turbo] Gen2 to Gen3 loom swap, Help please not revving
Ok, I've located the problem. I have had the faulty caps and resistors replaced, there all working awesome. Then I noticed something on the PCB. since when did a gen3 ecu have a tvis pin on it. so after spending hours testing sensors, following the engine loom point to point, turns out the ecu provided in the gen3 conversion is actually a gen2.
however everything else is correct with the package sensors and loom wise.
however everything else is correct with the package sensors and loom wise.