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Emerald Ecu Map - Mpi - V Max Scart

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#1 ABZSupercooper


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Posted 13 September 2018 - 09:44 PM

Hi Is there such a thing as a basic map for the Emerald ecu that I could check my set up against  , or is it very much a case of it needs specialist set up on a dyno , my mpi runs great over 2000 revs but is a bit lumpy below, I wondered if I could check the map and tweak myself.     

#2 Bat


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Posted 14 September 2018 - 07:00 AM


At low revs and low load you can alter the map yourself without too much danger to the engine. Base maps will be the same no matter which ECU really, the units may be different but you'll be able to see the pattern.

Do you have a wideband lambda to check the mixture?

Do you know what's causing it to be lumpy? It could be an auxiliary setting rather than the map itself.

Cheers  :proud:

#3 Bobbins


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Posted 14 September 2018 - 08:23 AM

Have you reset the TPS through the Emerald software?


If you do decide to mess with the map make sure you save the original before you start ... obviously! Then ensure the engine is fully up to working temperature, ie. no air or coolant temp corrections. Playing with the fuelling at tickover is straightforward and can easily be done through the live adjustments screen, if the map was setup for the car it's usually small fuelling adjustments rather than ignition adjustments that will give a sweeter tickover. If you need to make map adjustments above tickover it's difficult without either a rolling road or someone sat in the passenger seat who knows what they're doing whilst you're driving ... you can't replicate the load sites in the map sat in the garage/driveway just by revving the engine. It's therefore a case of guessing what changes you might need to make in the ignition or fuelling screens and trial and error.


You tend to notice map issues at lower revs so it would be worth getting it on the rollers, ideally with someone who knows the Emerald ... and Aberdeen is a long way from Dave Walker!

#4 mini13


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Posted 14 September 2018 - 09:50 AM

Also, before you do anything, get a timing light on there and check the timing is what the ecu thinks it is, just incase the trigger wheel has moved.

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