VS rough on start up, then fine

[PSYKO PHOENIX]

ok i did the restart thingy!

checked codes, code 49, took +ve off for 10 mins, re connected and started her up and...............

SHE GOT WORSE!!

imediatly re loged the code 49 but my god she ran horribaly!! coughd and splutterd, nealy stalled several times and was generly crap, ofcorse once i let her idol for a lil bit and warm up she was fine but the start was truly crap!

now im realy mixed up, if it was an electrics issue surly it shouldent have been that crap!

 

[OzJD]

once warmed up, was she fine?
and after warm, did you try her in a moving gear? results?

 

[PSYKO PHOENIX]

yea she was fine after she warmed up and same in reverse and drive, im so confuzed by this

 

[delcowizzid]

dfi cas or cam sensor/or wiring for them or even ecu ide say ide start by trying to borrow someones DFI and coilpacks.plus allways dissconnect the -ve battery terminal not the +ve your ecu will love you for it.

 

[PSYKO PHOENIX]

how much is all that gunna cast, i dont know enough people with coil packs and dfi's would holden have some etc?

 

[OzJD]

Just noticed this over here: Unofficial Holden Commodore Archive - Technical Tips

VN - VY V6 Commodore hard starting and misfiring under load

Fault- coil pack or DFI module

From: Peter Forster

Also on a VN onwards Commodore V6 (especially VN). If the DFI module (the module sandwiched under the coil packs) stuffs up on you on the side of the road try this... remove the coil packs and then turn on the ignition for a minute or two. The DFI module is spit into 3 separate modules (as the coil pack is also 3 separate coils). After the ignition has been on for some time feel (with your fingers) each individual module section and see which one is the hottest (careful, one may be very hot). The hottest one is the one that is shorted out. unplug that individual module and tape up the wires. Then replace the coil packs and you can limp home on 4 cylinders. A tip from my brother who does roadside assistance work for RACQ in Queensland.

From: Markus

 

[WogBoyz]

well im getting new coils n leads soon aswell as that thing fixed on friday so if non of them fix it it cud be my dfi although my doesnt backfire when driving or under load and runs perfectly

 

[FstStig]

Hey guys,

This sounds like a very similar problem i had with my VS. I replaced the DFI Module and Coil Packs, now she is running as good as new. I picked up everything from the wreckers for $70.

Here are some pics, incase some people are unsure where the DFI module is located.

Hope this helps

Cheers

Mumbo Man

 

[delcowizzid]

the dif and cas replacement was really directed at psyko pheonix as he had code 49.

 

[WogBoyz]

ohh so the black piece the coils are sitting on is the DFI? thats the impression i got from them pics anyway