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VEMS Engine management systems, plug & play ECU upgrade
- Thread starter PhilKent
- Start date
jameswalker1
New member
blade7
Well-known member
PhilKent said:it's got a fairly well sorted enrichment curve as it warms probably about 200% at -5degC, 175% at +5degC and easing off up to 100% at 69degC which is my min running temp.
Is that Peeps cold start mapping or have you adjusted it ?
TTM
Well-known member
blade7
Well-known member
PhilKent said:It's mostly what peep sent over with small tweeks to get a smoother idle as the temperatures rise from cold. Peeps Base map is a brilliant starting point.
Any updates?
I've been thinking about doing a stealth install and going back to a standard looking engine bay. What's so appealing about VEMS is it's versatility.
The story so far is:
Worked fine when recovered from winter storage.
Removed the ECU to install a switch to activate/de-activate the bluetooth module so that I could 'hardwire' to the PC if needed. (I also want to do the same for the A/B config setup)
Now the car is a pig to start/run.
All usual checks are okay, including continuity checks with the wiring harness but currently investigating a poor spark at plugs. Coil spark is okay but possibly a bit weak (new coil, although I've ordered a second just to rule it out)) But at plugs it's either non-existent or very weak (No. 2 being the strongest). This would suggest poor reference signal timing I think.
I have an auto-electrician booked for 6th August to investigate further.
I wonder if there are any VEMS users in the UK that might be able to loan me an ECU just to do a side/side test while the electrician is here?
PhilKent said:Re-awakening this thread as I've been having some issues of late with my ECU.
The story so far is:
Worked fine when recovered from winter storage.
Removed the ECU to install a switch to activate/de-activate the bluetooth module so that I could 'hardwire' to the PC if needed. (I also want to do the same for the A/B config setup)
Now the car is a pig to start/run.
All usual checks are okay, including continuity checks with the wiring harness but currently investigating a poor spark at plugs. Coil spark is okay but possibly a bit weak (new coil, although I've ordered a second just to rule it out)) But at plugs it's either non-existent or very weak (No. 2 being the strongest). This would suggest poor reference signal timing I think.
I have an auto-electrician booked for 6th August to investigate further.
I wonder if there are any VEMS users in the UK that might be able to loan me an ECU just to do a side/side test while the electrician is here?
Good evening, looks like I still get notifications for this, not something simple like the rotor arm, if the coil is good? Failing that, if it’s anything like mega squirt there’s 2 ignition drivers that can be burnt out if the settings are wrong. Pretty easy to replace, not sure about Vems tho.
blade7
Well-known member
PhilKent said:Coil spark is okay but possibly a bit weak (new coil, although I've ordered a second just to rule it out)) But at plugs it's either non-existent or very weak (No. 2 being the strongest). This would suggest poor reference signal timing I think.
Thought about going for wasted spark?
I have also seen the resistance on the plug caps go out of spec, (they have a fixed amount of resistance),
Tony
I've checked and cleaned the ignition switch.
All I can think is either ECU fault (but what I'm not sure, as I say I have fuel and signal to coil) or a ground 'leak' somewhere.....but no signs...
PSH
PCGB Member
Hope you get it sorted soon Phil, I know that it would drive me mad, luckily for me with these sort of problems I just hand it over to my son.....auto electricians aren't cheap...good luck
Pete
So sparks could the weak sparks be down to test method? holding against head? jump lead from battery onto plug should eliminate that. Double check Air (replace or clean filter) is VEMs MAF or MAP any way to test sensor? Leaving Fuel, you have some is there enough whats the pressure like in the fuel rail?
There is buried in the manuals somewhere a resistance value for each side of the coil,
Good luck!
Tony
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