Totally lost!

[Adam campbell]

I own a vy 2002 ecotec ute I’ve recently had an issue that I can not figure out. Started when I was driving sorta felt like it was starving for fuel stuttering and splattering got home started with the fuel filter new fuel didn’t fix it. Started looking into it more it sort of starts playing up around 2500 rpm and after 3500 rpm goes and away and drives normally till you try and give it some and starts playing up again. I’ve replaced-
Spark plugs
Leads
Coil packs
Injectors
Cam shaft position sensor
Still ran like ass ended up doing the inlet manifold gasket so fixed that
Still got no idea any help would be appreciated

 

[ant797]

throttle position sensor? they are dirt cheap by the way must be common problem

 

[ant797]

could try giving your maf a clean if you havnt done so also

 

[greenacc]

I second what Ant said. TPS play up like that. Around $70 for a genuine one. Don't waste your time with a fake one off eBay that doesn't work!

 

[ant797]

I second what Ant said. TPS play up like that. Around $70 for a genuine one. Don't waste your time with a fake one off eBay that doesn't work!

Pretty sure i got mine from here and works fine half the price https://automotivesuperstore.com.au/catalogsearch/result/?q=Vy+throttle

 

[Trevor loves holden.]

Did you check the codes?

 

[ant797]

Did you check the codes?

you need a aldl cable to check codes on a vy v6 $70 ebay

 

[Trevor loves holden.]

If TPS doesn't fix it, dfi. fuel pressure regulator, CAS, fuel pump.

 

[greenacc]

Pretty sure i got mine from here and works fine half the price https://automotivesuperstore.com.au/catalogsearch/result/?q=Vy+throttle

Well AFI is usually a good brand but I'd still be 50/50 on a TPS. With a bit of luck it might be a genuine part in disguise.
Now that I know the superstore is doing AFI stuff I'm going to check them out for something else I'm looking for since sparesbox Don't seem to sell it any more.

 

[krusing]

Replace the IAC Valve when you do the TPS,
Also could be a simple vacuum leak,
remembering the Rubber hoses/tubing could be breaking down after all these years,
And the plastic fitting, like plastic vac joiners.