VT L67 Getrag - hunting for idle

[chrismoddy]

Hi Guys,

New member to this forum but I have been following for quite awhile.

Alright so I have recently stuck an L67 into my VT S Pack manual. conversion went good but I have this problem with whenever it warms up its hunting for Idle pretty bad, the revs go up and down from about 650rpm to 12oorpm. it has a slight miss as well when on idle but not missing when driving or under load.

The things I have replaced and checked are:

Replaced spark plugs
replaced all coil packs
Replaced DFI module
Compression test - all ok
Swapped and replaced injectors
Replaced leads
Replaced IAC module
Replaced MAF meter
Checked for vacume leaks - all ok
Checked codes using tuner pro - no codes
Memcal is setup for L67 - Getrag
Valley gaskets have been done
Supercharger gasket done


The only real mods that have been done are the 10psi pulley

I have recorded a short log of when it's Idling and was wondering if anyone one with a bit of knowledge could have a look at it for me when they get a chance, and just see if any of the data looks out of place would be much appreciated?

Thanks

[Dylan]

Just to throw an idea out there. I've read of people having idle trouble and decal troubles after manual conversions on these.
What I've heard of them doing is comparing some IAC settings from an ecotec manual tune. With good success afterwards.
Its been spoke about on here in the past.

[chrismoddy]

Thanks for the idea Dylan appreciate it.

Definitely something for me to look into.

It was originally a manual ecotec so its got the Ecotec Manual ecu and the Memcal setup for L67 getrag but it could still be something to do with the IAC settings. That will definitely be a path I'm going to go down.


Thanks for your input Dylan I have uploaded the Log file if anyone can have a look

[VX L67 Getrag]

Have you modified the bin to suit manual?
There's normally a fair bit you have to change!

If you haven't changed anything start reading & changing/testing, if you have tried modifying the bin post it up so people can try & help!

[chrismoddy]

Hi VX L67 Getrag,

Thank you I haven't modified the bin at all I bought the memcal off ebay


So it should be all setup for manual but who really knows what they have changed as far as IAC settings etc.

Thanks

[VX L67 Getrag]

Without knowing what's been changed it's a guessing game, you really need to read the data off the memcal or through the serial data port of vehicle & then start from there, I doubt it would be hardware issue's more likely something NQR with the file on memcal!

[immortality]

Thanks for the idea Dylan appreciate it.

Definitely something for me to look into.

It was originally a manual ecotec so its got the Ecotec Manual ecu and the Memcal setup for L67 getrag but it could still be something to do with the IAC settings. That will definitely be a path I'm going to go down.


Thanks for your input Dylan I have uploaded the Log file if anyone can have a look

When you say manual ecotec was it originally a getrag or T5 box?

There was another thread about a manual conversion that was troublesome, I remember something about changing the timing maps to reflect the manual timing as this is quiet different around idle/low rpm areas.

[chrismoddy]

Hi Immortality

It was originally a getrag box.


Thanks VX L67 Getrag.

Yeah I wouldn't know where to start really I might just get someone with a bit of knowledge to set me up another Memcal to suit.

[Dylan]

VXL67GETRAG is your man. He can sort you oit with a good tune.
Id make contact with him.

[Dylan]

Try connecting to the ecu with this program and do a "Get BIN" so you can see what you're starting with.