mk1 Valver running rough

[Stu.]

Hi guys, Been at this a while now! When starting its running with a missfire. Then when driven theres just no power, Like its struggling to breath kinda thing.

So far, I've changed Plugs, Leads, Coil pack, Distributer cap and 4 injectors. Have also cleaned the ICV and the TPS wires are all still in tact. Compression test shows all cylinders have compresion. 175 - 180ish over all 4.

When given a sharp rev it pops from the TB!

Heres a video of how it was running before, Its not as bad now when idling / running. I'm pretty stumped.

Can anyone shed any light on this?

Cheers
Stu

 

[Djw John]

Firing order 1 million per cent correct?

Did it just start doing it randomly and then you changed parts or was it after a service?

 

[Stu.]

firing order you say?

When i was using it on the road, The only issue i had is if you were driving along, Or pulled away from a junction it bogged right down then rose very slowly. However, If you were to accelerate gently it would pull no problem.

After it being parked up for about 4/5 weeks it started but running like rough as tits!

 

[Stu.]

Fuel filter has also been changed, If that makes any differece!

 

[Daniel]

On my last williams, the rocker cover gasket was so fcuked that it used to douse the spark plugs in oil.

Once I changed it, it ran perfectly. (Well, as perfectly as an old french hatchback can be expected to run! lol)

 

[Djw John]

Good point, how are the plugs looking? Good/white/soaking in petrol or oil?

 

[.Stevo.C.]

Map/maf sensor what ever its called. There's a chance it might be that as I had similar problems with the Williams after accidentally cutting the cable to it.

 

[Stu.]

On my last williams, the rocker cover gasket was so fcuked that it used to douse the spark plugs in oil.

Once I changed it, it ran perfectly. (Well, as perfectly as an old french hatchback can be expected to run! lol)

Good point, how are the plugs looking? Good/white/soaking in petrol or oil?

they looked a bit minging when it had sat for a bit. But had the plugs out today and cleaned in a spark plug cleaner. And adjusted all the gaps to suit the book. Had HT testers on aswell and all the leads are sparking as they should.

 

[Stu.]

Map/maf sensor what ever its called. There's a chance it might be that as I had similar problems with the Williams after accidentally cutting the cable to it.

This the one on the bulkhead with the vacume pipe going to it?

 

[.Stevo.C.]

That's the one mate.

 

[Laine_16v]

That doesnt sound like your typical valver missfire IMO. Sounds almost like the cambelt may have skipped a tooth, id be checking that.

 

[Stu.]

That's the one mate.

Just changed that, Didn't make the slightest difference!

That doesnt sound like your typical valver missfire IMO. Sounds almost like the cambelt may have skipped a tooth, id be checking that.

Hmm. Whats the easyest way about checking it? How could it be caused as it only really got bad after it had been sitting up a while.

 

[Djw John]

Are you sure you've not done something odd with the dizzy/dizzy cap/rotar arm? Or as I said the firing order, it does sound like its igniting when it shouldnt.

 

[The Chubby Pirate]

Maybe it's because you're gay?

 

[Stu.]

Are you sure you've not done something odd with the dizzy/dizzy cap/rotar arm? Or as I said the firing order, it does sound like its igniting when it shouldnt.

I dont think so! It ran this s**t before I touched anything lol.

Maybe it's because you're gay?

I've yet to rule this out.

 

[Fraser.J.]

+1 Danny