vems trigger problems on aan

[jade]

Are you sure thats your problem before welding more on your flywheel

[diesel des]

A few grams won't make a difference on this. It's not a full race engine. The sensor already seemed less than 1mm away so I think welding is my best option. Would like a picture though. Cheers des.

[terrybullwon]

Welding on to a factory balanced fly wheel sounds like a really stupid idea.

Moving the sensors closer buy removing metal sounds alot better. If you really have to make the timming pin "bigger" maybe worth going to a machine shop and have one with a off set made so its closer to the sensors and then it can also be weight matched.

[terrybullwon]

Welding on to a factory balanced fly wheel sounds like a really stupid idea.

[diesel des]

Ok the welding to the flywheel sounds like what to do. Should i use a piece of mild steel and weld with normal rods. Or do I need dissimilar cast rods. I'm ok with a mma arc welder. What size of steel should I use. Any pictures. Wish I had of asked this last week when it was appart.

[jade]

I ran a 7a flywheel no problems, The map supplied with my Vems started my car but would of destroyed the engine if I tried WOT was not even close I am a good mechanical fitter engineer but without Repo,s help I would not of got anywhere with my vem and would of destroyed my engine. Get professional help to start with as most have

[A80Avant]

no, no need to swap your flywheel, but the problem is there as Marc explained to me and eventually solved the problem.

2 solutions:

1) try and grind some metal off the bracket that holds the trigger sensor so that it turns slightly to 'see' the pin on the flywheel better. (that didnt work for me + we took the sensor closer as well, and even damaged one before realising that we werent progressing that way. BUT marc says sometimes it works

2) take the starter off, manually turn the crank to see the pin on the flywheel. YOu will need to weld some more iron next to the pin,make it wider or make a proper block of it. Make sure the height is the same as the OEM one or the dual mass flywheel one, and flatten the surface. After that it should work. Thats what made my car fire up and drive after that. Mine as soon as it fired, it hit 1500rpm and then fluctuated between 1500 and 15000 rpm reading making the car practically undrivable.

hope it helps

[diesel des]

Ok will do tommorow when I'm on my computer. I haven't actually looked at the config file is it just a text file. Jamo I really don't feel like swapping the flywheel 2 days after doing the clutch. I don't want to ever see the dam flywheel again LOL.

[Jamo]

Post your vemconfig file up

BTW the 7A flywheel could be the issue, as A80avant found the pin on the flywheel wasn't wide enough to trigger correctly.

[diesel des]

Ok I'm trying to setup vems on my aan. I now actually have two brand new vems ecus. Both have the same issue. Car is fine on motronic. So I swapped the red and purple wire on the crank home sensor as described on the net. The car starts fine. But between 2k and about 3.5 k rpm approx I get triggering errors. Eg the rev counter bounces about mad and I get big backfired etc. If I keep the revs up the car drives fine but between these revs its undrivable. it actually seems better with the wires as standard.

Now the funny bit. If I start the car then set secondary trigger to disabled, then disconnect the sensor the car runs fine with no trigger errors. But the car is a balls to start like this. Sometimes it does sometimes not. It always starts easy with the secondary sensor turned on.

My vems supplier is helping resolve this hence the second ecu. But anyone any thoughts. Firmware is 1.74 and I'm using vemstune. Now I use a 7a flywheel but have been told this isn't the issue as new vems is ok with that. and I have just changed the clutch this week so I don't Fancy pulling the gearbox again. The pin looks fine on the flywheel.

Cheers des.