As above. Should the ecu on an impul be marked impul?

Edited February 27, 20214 yr by dipone

Not necessarily, depends on the build history of the car. The part# in the photo shows 23710-48P76. This comes up as

an ECU for a JDM 1993/09 - 1994/10 TT Auto.

http://www.jp-carparts.com/nissan/part_detail.php?maker=nissan&type=132&cartype=14&fig=226&part=2371048P76&page=1&img=226A 001

If you take the upper lid off the ECU (4 screws) you can see if the EPROM is soldered into the PCB which would indicate the factory EPROM (and MAP) is still

in place. If the EPROM is socketed (ie removable) it would indicate an aftermarket EPROM (and MAP) is likely to be present.

Brilliant thanks for the help. 

Can I just fit an impul ECU or not? I was offered one in December but just assumed mine would of had it fitted and didn’t think of buying it. 
 

 

Edited February 28, 20214 yr by dipone

Japanese aftermarket ECUs tend to be mapped for the higher octane fuel that is available in Japan (~100 ron) and are

usually more agressive in the fueling and timings as a result. This can cause issues with detonation when the using lower grades

of fuel in the UK. It all depends on the mapping Impul did.