What now!
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haircutmike

Original Poster:

22,511 posts

234 months

Saturday 14th April 2012
quotequote all
I've solved the noisy tappet problem by setting them as described by Dom!

Now, a weird problem has raised it's head and I haven't touched anything, honest!

It starts straight away and revs at 1800 Rpm with the air screw tirned right down on the plenum.

As the engine warms, it wants to cut out all the time as you try and rev it.

I have a wideband fuel mixture gauge and it is reading 8-9, way too rich.

I lowered the fuel pressure to 20psi and it now revs cleaner and the gauge is running 11ish.

Fuel pressure should be 36 ish I believe but at that pressure it wants to cut out all the time.

Suggestions?

I have another car here so I may change the AFM.

haircutmike

Original Poster:

22,511 posts

234 months

Saturday 14th April 2012
quotequote all
Swapped the ECU with a 5.0 and problem solved.

Anyone know the correct fuel pressure?

Alexdaredevilz

5,697 posts

209 months

Saturday 14th April 2012
quotequote all
haircutmike said:
Swapped the ECU with a 5.0 and problem solved.

Anyone know the correct fuel pressure?
You will need to drive and keep checking the AFR gauge to tweek your pressure to suit your car imo

36 or 38 psi might be good for one car but might be out for yours

neal1980

2,584 posts

269 months

Saturday 14th April 2012
quotequote all
Your car is screaming out for a fully mapable ecu and coil packs! Come on get it sorted..... Best money you can spend now

haircutmike

Original Poster:

22,511 posts

234 months

Saturday 14th April 2012
quotequote all
neal1980 said:
Your car is screaming out for a fully mapable ecu and coil packs! Come on get it sorted..... Best money you can spend now
You're dead right!

All I have to do is make a bit of money this summer then sort it.

I fancy an emerald.

Just tweaked the fueling and it really does go.
Took out a standard 5.0 just after and although the 5.0 had plenty of power, my 4.6 feels that much more lively and urgent, better then at Shakey smile!

carsy

3,019 posts

195 months

Saturday 14th April 2012
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How and what did you eventually set the tappets to Peter and are they now nice and quiet.

haircutmike

Original Poster:

22,511 posts

234 months

Saturday 14th April 2012
quotequote all
carsy said:
How and what did you eventually set the tappets to Peter and are they now nice and quiet.
6-7 thou on the heal of the cam, actually set in the order of that yank website that slideways put up.

Quieter but not nice and quiet!