Hesitation

[jojo]

A rare engine related question from me as I'm online. I seem to have a hesitation problem on part throttle. VCDS scan comes up pretty much clear. I had an SAI fault, but it's not connected to the airbox, so I can disregard that, and there was 2 rear ABS sensor faults aswell, both sides, that would be from my Haldex not working, so I can disregard that aswell.

Anyways, it just feels the car misses a beat whilst cruising on part throttle. My N75 is newish, and the MAF is a couple of years old, under 5k miles. Under WOT, the car feels strong, and looking at my boost gauge, it's running as it should. Heat could be a factor, as it was really hot!

Thoughts?

 

[jojo]

Forgot to mention it also stalled once as I was coming upto a junction and dipped the clutch. That's never happened before.

 

[Vex182]

Vacuum leak? When I had a small leak, the revs used to drop pretty low like it was trying to stall.

 

[S3Hendry]

Maybe age is a factor. Still on your first engine?

 

[A3-Lee]

Could be a vac leak mate or a lack of use I can smoke test now as well text me

 

[CMcKenzie]

Maybe age is a factor. Still on your first engine?

I doubt age is a factor when Joe's car has done less than half the mileage of mine, and I've still got my original engine and turbo..

 

[jojo]

Maybe age is a factor. Still on your first engine?

I doubt age is a factor when Joe's car has done less than half the mileage of mine, and I've still got my original engine and turbo..

^^ What he said, currently on 65k miles I think? Had the oil pick up done just incase, power is there, which is why I'm scratching my head about the boost leak, no loss in power, it pretty quick actually!

 

[Vex182]

What are the fuel trims like? Prehaps try a throttle body alignment.

 

[jojo]

What are the fuel trims like? Prehaps try a throttle body alignment.

I will try this next time I get her out.

 

[jojo]

And she seems to be running fine again today, looks like the heat got to it last week, will report back later.

 

[jojo]

And she seems to be running fine again today, looks like the heat got to it last week, will report back later.

I tell a lie, it's still hesitating, unplugged MAF sensor and seems slightly better, pressure test next methinks.