First up - sorry for the long post - but I'm getting desperate and need help working this out.
I'm getting the ECU in my car tuned (it's an E2 ECU with a chip on my 2.3 litre) and sofar the results the guys have obtained are fantastic and I'm nothing short of impressed with the effort and integrity they've put into this job of work.
It rolled in with 143kw atw according to their dyno and after they've started tuning HAS pulled 192 kw atw. I say HAS because he is finding that the car runs inconsistently. The next power run it did gave 177kw, then 182kw, then 156kw, then 172kw (etc etc etc). It just fluctuated and he couldn't get it to pull the same power figure more than once.
He said it's retarding timing and injecting more fuel and he can't understand why it would be doing that. His tune is great, the A/F ratios are nowhere near lean and the boost is no higher than 16psi. The thought is that the factory knock sensor is detecting something that it's reading as knock (a mechanical noise perhaps?) and pulling timing, or an electrical interference is causing it to retard the timing (I just don't know).
I've spoken to a mate who is a bit of a Mitsu tech head and he told me that the knock sensors are matched to the ECU (????) and that you MUST have the right knock sensor paired to your ECU (part number to part number). Something about our beloved Mitsubishi constantly doing tiny little changes along the line to what we believe are the same parts.....
Does anybody know where I could find out how to pair a knock sensor PN to an ECU PN? I got the ECU from one source and the knock sensor from another (it's-a-bitza combination) as he is certain that it's something to do with the knock sensor but just can't think of what would be causing it to retard the timing. He said if the car was pulling the same power figure more than once he'd be happy but it's just frustrating him now and he wants to give me the car satisfied that it's consistently performing to its full potential.
He's going to disconnect the knock sensor and ensure his dyno sensors are hooked up and try running it like that tomorrow, so if it fixes the problem - we know it's the knock sensor, but how do I get the right one to keep the problem solved!?
I'm getting the ECU in my car tuned (it's an E2 ECU with a chip on my 2.3 litre) and sofar the results the guys have obtained are fantastic and I'm nothing short of impressed with the effort and integrity they've put into this job of work.
It rolled in with 143kw atw according to their dyno and after they've started tuning HAS pulled 192 kw atw. I say HAS because he is finding that the car runs inconsistently. The next power run it did gave 177kw, then 182kw, then 156kw, then 172kw (etc etc etc). It just fluctuated and he couldn't get it to pull the same power figure more than once.
He said it's retarding timing and injecting more fuel and he can't understand why it would be doing that. His tune is great, the A/F ratios are nowhere near lean and the boost is no higher than 16psi. The thought is that the factory knock sensor is detecting something that it's reading as knock (a mechanical noise perhaps?) and pulling timing, or an electrical interference is causing it to retard the timing (I just don't know).
I've spoken to a mate who is a bit of a Mitsu tech head and he told me that the knock sensors are matched to the ECU (????) and that you MUST have the right knock sensor paired to your ECU (part number to part number). Something about our beloved Mitsubishi constantly doing tiny little changes along the line to what we believe are the same parts.....
Does anybody know where I could find out how to pair a knock sensor PN to an ECU PN? I got the ECU from one source and the knock sensor from another (it's-a-bitza combination) as he is certain that it's something to do with the knock sensor but just can't think of what would be causing it to retard the timing. He said if the car was pulling the same power figure more than once he'd be happy but it's just frustrating him now and he wants to give me the car satisfied that it's consistently performing to its full potential.
He's going to disconnect the knock sensor and ensure his dyno sensors are hooked up and try running it like that tomorrow, so if it fixes the problem - we know it's the knock sensor, but how do I get the right one to keep the problem solved!?
