I recently had a JDM 2nd gen swapped into my st185 and was wondering what sort of issues there might be relating to the differences between JDM and US versions. I ask because the car has started overheating after highway trips and is knocking (94RON gas) at about 2300 RPM around town, after reaching operating temp. The car is currently in the shop that did the swap.
Now I'm no mechanic, but I was thinking one cause may be the EGR system. So I check out my parts bin to find the old EGR parts (like the valve) from the original engine and realized the old US manifold is on the car - because the manifold I have lying around has no EGR - just an undrilled bung on the manifold. Should I be using the JDM intake manifold? Even if this is not causing the overheating/knocking, are there any other issues with this swap? I know Japan uses higher rated gas, but would that cause overheating?
BTW: The car is currently stock aside from an IC fan and boost gauge.
Thanks
Now I'm no mechanic, but I was thinking one cause may be the EGR system. So I check out my parts bin to find the old EGR parts (like the valve) from the original engine and realized the old US manifold is on the car - because the manifold I have lying around has no EGR - just an undrilled bung on the manifold. Should I be using the JDM intake manifold? Even if this is not causing the overheating/knocking, are there any other issues with this swap? I know Japan uses higher rated gas, but would that cause overheating?
BTW: The car is currently stock aside from an IC fan and boost gauge.
Thanks