VK EFI - Rev Surge Problem

[darkmoon]

Hey y'all,
Have an EFI VK and when I start it cold or give it a sharp boot (Even if cold or warm) the revs surge and eventually stalls if I don't put my foot on the throttle.

This only happen at idle and otherwise runs fine. It doesn't use more fuel than it should nor does it run hot.

I have changed all filters, air and fuel and checked over the inlet and exhaust and their doesn't seem to be any leaks.

It has no oil leaks, the front seal and harmonic balancer has just been changed and no other leaks are apparent (thought there might have been a crank case pressure prob).

Any ideas???
Ted

[newtownbob]

tacho relay or dirty air sensor (the swinging one) just after the aircleaner, I forget the name

[darkmoon]

Awesome, last best hope I think. Thanks heaps mate
Ted

[darkmoon]

Thaks to newtownbob, you were spot on mate. i went into repco and priced a new air flow sensor at $250 so I bought some contact cleaner, I thought a non-residual evaporative cleaner would be the shot and it worked a treat. The car no longer surges its revs, power is noticable better.
Well done

[newtownbob]

Thats exactly what I did, EXACTLY!!

[Bastian]

My VK EFI 202 has the same problem as what yours has. I have to give it some throttle when I start her up, otherwise it'll stall. Probably the same reason?

Power is noticeably better?

[frosty_82]

hey dude.I had the same problem with my 202 efi run fine give it some it would cough then die.I changed the head and EFI manifold and that solved my problem.Lets us know how you get on with it.

frost