How I tune a V6 Essex 3.0L.

[whitemice]

Dave is right about a 1/4" drive socket and swivel, 3/8" or !/2" tend to not give any clearance at the clamp bolt/distributor for a good fitting, i use a 13mm !/4" socket and 1/4" swivel then an adapter into a long 3/8" extension and ratchet drive.

[davev6newman]

White mice,

You got twin Weber on your van?

Ive just put service kit on mine and i cant get it to run right now, any thoughts on set up procedure?

Also just looked at carb on my pinto and the accelerator pump moves with the throttle, but i see no sign of it moving on the V6, should it?

[whitemice]

I've got single carb.

What carb have you got? 38/40 weber?, accelerator pump will be out of picture when higher rev band is achieved @1500rpm plus, it's only there for the low fuel draw condition (low airflow) during initial transition to main fuel and air jets.

Have you got hesitation when driving, eg. low to higher revs, ie. intermediate pedal 'flat spot'?

[davev6newman]

Ive got a Weber 38dgms carb, and yes i have a major flat spot from low to high revs and it will stall if i put peddle straight down from low revs or a stand still.

[whitemice]

Ive got a Weber 38dgms carb, and yes i have a major flat spot from low to high revs and it will stall if i put peddle straight down from low revs or a stand still.

Did the van always have this carb and was it ok before the strip-down 'service' , eg. in the sense that there was no flat spot beforehand.

[davev6newman]

I dont know the history of this engine, all i know it had it when i got it. Ive only driven it once properly when i drove it home from Linconshire. From what i can remember it drove fine then. The only reason i serviced it was to try and eliminate the smoke from the exhaust.

I cleaned the carb blew all the jets and gallyways with a can of compressed air, fitted the new bits inc a power valve diaphragm, the only thing that is missing is an o ring in one of the idle jets, i have that coming.

The original question about the accelerator pump is because i noticed the one on my pinto engine moving at low revs and i never noticed this one moving.

Could this be the problem or am i just not setting it up correctly?

[whitemice]

Could be seized accelerator piston/valve/linkage if it's not moving at all, take air filter off and you should see a healthy squirt of fuel into the venturi when you quickly throttle up from idle, if not there is probably a sticking/blockage fault with accelerator pump.
You can check choke setting and that the butterflys are fully open at pedal WOT at the same time.
plenty of info on them on net...
http://www.thecarburetorshop.com/Troubleshooting.htm
http://www.google.co.uk/webhp?source=se ... 66&bih=667

[davev6newman]

Well im officially a prized muppet,

I checked the accelerator diaphragm again today i had put the spring in wrong way. Instead of the spring bieng between the main body and the diaphragm i had put it betwwen the diaphragm and the lever. Consequently the spring was getting caught in the lever and the whole thing jammed up. It runs much better now.

[whitemice]

Sorted, next thing i would do Dave is focus on getting the timing/mixture just right as the V6 is susceptible to the two rear cylinders overheating.

[robbie.cee]

just read in haynes manual it says use the blanked off port on inlet manifold for vac gauge connection- but where is this?

i stuck my vac gauge on advance pipe to dizzy- got a measly 8 in/hg.

got blowing exhaust manifolds to sort first, then new dizzy/vac unit then spend time tuning her up! bloody helpful info here just need to find a vac unit that works and fits!

[davev6newman]

i used the blanking plug on the servo to fit my vacuum gauge, have you got one of those?

[davev6newman]

Sorted, next thing i would do Dave is focus on getting the timing/mixture just right as the V6 is susceptible to the two rear cylinders overheating.

I had ago on this today and followed instruction on weber site to do it by ear.
First to wind out idle screw so its not touching, then wind it back in to half a turn past touching,
(but i had to wind mine in more than that as it wouldnt run)

Then wind both mixture screws in till it stops and then back out a quarter turn at a time untill it runs at it best and fasted. Then set the idle speed.
But it did say if you you need to wind them out more than 1.5 turns you might need bigger jets, i had to wind mine out 2.1/4 turns

I also tried to compare this with a colortune kit. What i did find when i took no 4 plug out and fitted kit then tried to adjust the right hand mixture screw i only got any change if the screw was all the way in or all the way out, no change in colour between these points.

So anyhow when i adjusted the screws i adjusted both at the same time, but only the left hand side on was making any change in engine speed.

[Neil]

[quote="whitemice"]I've got single carb.

SO HAVE I UNTIL MONDAY THEN ITS HAVEING A NICE NEW WEBER

[davev6newman]

I've got single carb.

SO HAVE I UNTIL MONDAY THEN ITS HAVEING A NICE NEW WEBER

twin choke? 38dgms?

[robbie.cee]

i got 38 dgas on mine. 40 dcnf or summit are also used ive read...