2.9 V6 Engine issues

[M3CHA-MONK3Y]

Hi Guys,

I'm having an issue with my TVR. It's running the Ford 2.9 V6.
Anyway, I rebuilt it over Christmas after the head gasket started to go, took 3 months but was sorted, checked out and all good as new.
My problem is, at the moment its running rich on the emissions and is hesitating and spluttering below 3500 rpm. It's idling fine, but chucking out some serious emissions out the back. I've done the timing twice while the ECU is set in service mode, once at 12 degrees (Ford recommended)where it ran lower on emissions but has low power and once at 15 degrees(Other TVR owners recommended) where it was high in emissions but pulled a lot better. Hesitation at low revs remained whatever I did.
Any ideas what would cause poor low range power and spluttering. I'm convinced its fuel related, maybe fuel pressure? I'm completely stuck and could do with some advice from somebody who knows a bit about Ford engines.

Cheers

[Justin S]

Have you changed the throttle pot?.I had headaches with mine running rich on my S3 and as soon as I changed that was sweet. It is on the throttle body and are known for failing and causing rough running.2 screws and a connector ans was done.I would look at that.

[Mr_B]

Had this engine in a Ford Sierra XR4x4. Does the TVR use the same double air flow meters ? These can loads of trouble on my car. Any water ingress and they were shot. Maybe borrow some from a fellow owner to check ?

[Simon Says]

Mr_B said:

Had this engine in a Ford Sierra XR4x4. Does the TVR use the same double air flow meters ? These can loads of trouble on my car. Any water ingress and they were shot. Maybe borrow some from a fellow owner to check ?

Agree with the above,also worth checking the hoses from Throttle body to Airmass meter if they are holed or perished the car will run like crap inlet manifold gasket failure was common also but that normally causes a go lean and misfire problem,could be worth checking the CTS output also.