99 VT clubsport no power/surging

[hsv472]

Dicky coil pack or packs?

Would they throw a code though?

[VTClubSprtR8]

Transmission been serviced lately ? These symtoms can come from a malfunctioning tranny.

[Woodchukka]

Would they throw a code though?

I would say that would depend if the fault was in the primary or secondary winding of the coils. I had a lead breaking down and there was no misfire or fault logged which would present the same as a failure in the secondary winding's of the coil as the ECU is not connected to that winding only the primary side. Not 100% sure how the ECM is wired into the primary side either so not sure if the ECM could/would detect a fault in the primary winding either. Someone else might chip in there.

[Bling Bling]

Tryed the throttle position sensor?????? or feul pump pressure good luck.

[VNV8]

Try running it with the air flow meter unplugged, see if that makes a difference. Cleaning them usually does SFA.

[hsv472]

I have a mate with a VX ss, so I might have a day in the shed and swap a few things like AFM, tps etc. One thing I did notice is that I unplugged the pcv valve of the throttle body last night and it did not affect the engine at all, not one bit. (Not blocked as I can hear the air sucking when unplugged) is that normal? I would have thought a big vacuum leak like that would affect it??

[VTClubSprtR8]

Have you physically checked the full length of the PVC hoses and connections, especially at the rear of the intake manifold where the PVC hoses run. Common problem is a rubber joiner in the PVC hose at the rear of the Intake manifold perishes/becomes soft and leaks. That could be why there is no change when unplugging it at the front of the intake.

[hsv472]

Yeah I plan on pulling the whole pcv plumbing off tomorrow. Be nice if it was something simple!

[Micks]

An ol trick with vac hose leaks is pour a small amount of fuel into a hand trigger spray bottle & carefully spray on sus vac lines whilst eng. is idling a sharp rise in rpm is generally a good indicator of where the leak is.
Disclaimer: Don't blame Mick if your ride catches on fire!!

[hsv472]

An ol trick with vac hose leaks is pour a small amount of fuel into a hand trigger spray bottle & carefully spray on sus vac lines whilst eng. is idling a sharp rise in rpm is generally a good indicator of where the leak is.
Disclaimer: Don't blame Mick if your ride catches on fire!!

Lol I'll check it all out and see how we go. If I can't fix it, the whole car might get sprayed in petrol!

[Micks]

Lol I'll check it all out and see how we go. If I can't fix it, the whole car might get sprayed in petrol!

Ya can't think out loud!

[macca_779]

Pull the plugs and see if they all look the same. Might be an injector issue