V6 Engine Problem

[ihouston]

I have been advised that there are more V6 experts on this forum that may be able to help me with my problem. I have a 2.8i Tasmin that chokes its self when I accelerate hard and reach about 3000rpm it feels like it wants to cut out and die - if you ease of the throttle and let it recover it will pick up and you can get more revs out of it until the problem arise around another 500rpm or so up the scale. I have recently fitted a rebuilt engine , new ignition leads, plugs, Air Filter, and fuel filter so I can rule these out.
Is my problem electrical or fuel based - can anybody help me please and release the power in this engine freely.
All suggestions gratefully recieved.

[clarenceboddiger]

It sounds like a fuel problem to me, has it done it since you replaced the filters etc ?? I'm thinking something along the lines of an air lock in the fuel system.Just thinking that an ignition problem would tend to stay at the same point whereas this fault sounds like it is clearing once something,ie fuel supply, has had time to recover.

[Barkychoc]

Don't automatically assume that a new component can't be faulty.
Do you have any of the parts you took off - you know these work ok. eg fuel filter.

Is the distributor the original one?
I think the 2.8 has mechanical advance could be the advance weights are seized.
Problem is that it could be quite a few things......

Might also be worth seeking out a ford capri forum.
Only the S1 has the 2.8 engine, all the other V6 S's have the 2.9 which is very different from a fuel injection & ignition point of view.
The Capri always had the 2.8

Chris

Edited by Barkychoc on Thursday 18th October 16:40

[Road2Ruin]

clarenceboddiger said:

It sounds like a fuel problem to me, has it done it since you replaced the filters etc ?? I'm thinking something along the lines of an air lock in the fuel system.Just thinking that an ignition problem would tend to stay at the same point whereas this fault sounds like it is clearing once something,ie fuel supply, has had time to recover.

I agree sound like a fuel supply problem. Could be a faulty fuel prssure regulator or fuel pump not getting enough fuel to the engine in time an so stalls under hard acceleration. It will of course recover when you take your foot off and give the fuel a chance to catch up. An air blobk is also another possibilty as mentioned above.

[ihouston]

Thanks for the advice Gents - any idea where I might find the fuel pressure regulator

[clarenceboddiger]

Barkychoc said:

Don't automatically assume that a new component can't be faulty.

Good point, I've had that a few times as well.

[Le TVR]

If it fires up OK from cold, ticks over and runs fine on part throttle, I would have a look at the airflow meter unit. Probably sticking mid track and needs cleaning.

[Rockey]

Le TVR said:

If it fires up OK from cold, ticks over and runs fine on part throttle, I would have a look at the airflow meter unit. Probably sticking mid track and needs cleaning.

Agree typical afm symptoms

[Barkychoc]

Guys I think you may be missing the mark a little - this is a 2.8 and I understand that there isn't an electrical airflow meter - there is a flap that is moved by the air passing which directly acts on the fuelling mechanically.
There's not so much electric trickery on the 2.8

Could be sticking though of course, or an air leak on the intake somewhere

Chris

Edited by Barkychoc on Friday 19th October 17:36

[ihouston]

This could be why I could not find the air flow meter - I am also struggling with the fuel pressure regulator - I think this is more relevant to a system with a carburettor or am I wrong. I will check the air intake side although I am sure I have no leaks as again most of this is new clips hoses etc.
Thanks for all the help

[Barkychoc]

I think both units are combined into one housing - and it is a mechanical linkage batween the two.
This unit has a pipe to each injector from it - so hopefully reasonably obvious.

Sorry can't be of much help

Chris

[Le TVR]

The 2.8 does have an airflow meter albeit a mechanical one.
The movement of the plate is directly linked to the fuel dosage.
An example of this is the way that it creates an 'accelerator pump' effect. The mechanical flap has no movement damping and almost no friction. Sudden acceleration makes the flap swing open suddenly and overshoot before coming back to the 'correct' position. This 'overshoot' causes the extra fuelling needed.

I find that mine benefits from a clean up at every annual service.

[Barkychoc]

ihouston said:

This could be why I could not find the air flow meter - I am also struggling with the fuel pressure regulator - I think this is more relevant to a system with a carburettor or am I wrong. I will check the air intake side although I am sure I have no leaks as again most of this is new clips hoses etc.
Thanks for all the help

It would be well worth getting hold of a haynes manual that covers the 2.8 engine.
Capri / Granada / V6 sierra.

It will hopefully have a full description of the injection system along with some troubleshooting.

I'd have a look on ebay.

Chris

[tvrscw]

Hi did you sort the problem with your engine.i had a simular problem with mine

[ihouston]

No have not really got around to sorting the problem - I have cleaned the metering head and checked that the sensors are all working OK - I am thinking that it may be the fuel pump. If you had the same problem did you locate the fault and if you did what was it.
Cheers
Ian