Hi everyone, I have a little bit irritating issue with my car, subaru impreza 1.6L 2007 automatic transmission
Engine and transmission reached a state of "non-repairiblity" due to extreme mis-treating by the previous owner (I got it for about half the regular price, so I guess it's a win)
I thought it was time for an engine and transmission swap, so I went to the local workshop and got a 2.0L system swapped in.
The performance and acceleration were extremely higher than before, but fuel consumption was ~17L/100km which is really high for driving on highways at moderate speed with no excess pressing on the gas pedal (roughly 1-2.5 RPMs all the time) without air conditioner
The mechanic "tuned" the ECU and the fuel consumption was reduced to ~11L/100km, but performance was cut to almost half what it used to be when it was first swapped.
Then he tuned it once again and got a weird behavior regarding fuel consumption
Highway driving gets me ~7L/100km
But a mild ocassionly traffic or a couple of road bumps during the highway gets high as ~13L/100km
Is this difference expected when comparing highway with really mild traffic? Or even slowing down for a couple of road bumps during the highway?
And the performance is like 75% of what it was when it was first swapped.
The deal was to swap in a 2.0L impreza system, I doubt it's what was swapped but a 2.5L legacy instead:
The old engine got an EGR while the new one doesn't, although the EGR is still conncted and "Check engine" light comes on when disconnected, is it right to still use the old ECU with the EGR attached or use a Legacy one that's a match for the new engine without an EGR?
Unusual high fuel consumption suggests it's a 2.5L not a 2.0L? This fact is supported by "Reducing fuel consumption = Reducing engine performance"?
Lastly, I couldn't find any info using all the numbers found on the transmission or the engine block or heads:
Those numbers are on the transmission body: 218700 and TZ1A4ZFCAA
And those on the block right next to the transmission body: B087819
And those on the left head: 227276
An image of the engine is attached
Engine and transmission reached a state of "non-repairiblity" due to extreme mis-treating by the previous owner (I got it for about half the regular price, so I guess it's a win)
I thought it was time for an engine and transmission swap, so I went to the local workshop and got a 2.0L system swapped in.
The performance and acceleration were extremely higher than before, but fuel consumption was ~17L/100km which is really high for driving on highways at moderate speed with no excess pressing on the gas pedal (roughly 1-2.5 RPMs all the time) without air conditioner
The mechanic "tuned" the ECU and the fuel consumption was reduced to ~11L/100km, but performance was cut to almost half what it used to be when it was first swapped.
Then he tuned it once again and got a weird behavior regarding fuel consumption
Highway driving gets me ~7L/100km
But a mild ocassionly traffic or a couple of road bumps during the highway gets high as ~13L/100km
Is this difference expected when comparing highway with really mild traffic? Or even slowing down for a couple of road bumps during the highway?
And the performance is like 75% of what it was when it was first swapped.
The deal was to swap in a 2.0L impreza system, I doubt it's what was swapped but a 2.5L legacy instead:
The old engine got an EGR while the new one doesn't, although the EGR is still conncted and "Check engine" light comes on when disconnected, is it right to still use the old ECU with the EGR attached or use a Legacy one that's a match for the new engine without an EGR?
Unusual high fuel consumption suggests it's a 2.5L not a 2.0L? This fact is supported by "Reducing fuel consumption = Reducing engine performance"?
Lastly, I couldn't find any info using all the numbers found on the transmission or the engine block or heads:
Those numbers are on the transmission body: 218700 and TZ1A4ZFCAA
And those on the block right next to the transmission body: B087819
And those on the left head: 227276
An image of the engine is attached
Attachments
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