Club 80-90 Forums

Hi

I have just started the aaz I have been putting in my van, When I start the engine it goes to full revs at which point I turn it off cause I dont want it revving that high, Which is the screw to bring down the idle? there are two screws on the back of the carb what do they do? Is there a pump starting mode? could this not be turning off? Is it possible the governor could have siezed? Pictures of my injector pump below

There are two long threaded screws i can see one in the image.That would be for adjusting the stop for max revs.Where the lever on the pump for the throttle cable is this sits against the other long screw which can be adjusted for low or max revs.If its screwed up against the lever to much the engine will rev high.But it could be the lever for the throttle cable has been incorrectly assembled on the splines that go into the fuel pump.Looking again at the pict the throtle lever is well a way from the max rev screwed thread stop.Has the lever been taken off the pump body& then refitted in a wrong position on the splined shaft .If it has been taken off make sure the splined shaft is moved into a positon to low revs on tick over then fit the lever assembly

Presume it didn't run like this in the donor car before being removed. probably not so must be somethimg you have done. Before adjusting anything on the pump, which shouldn't need touching have a look at what you have done. Try disconnecting throttle cable and running. Does it still rev high then. look at the modified accelerator lever, corrrectly position and is the throttle sitting on the stop.

Has the lever been taken off the pump body& then refitted in a wrong position on the splined shaft .If it has been taken off make sure the splined shaft is moved into a positon to low revs on tick over then fit the lever assembly

Please answer

Guys

I have ensured that the throttle lever has been fitted correctly, I too it off yesterday to check, it sits on the return stop, I removed the throttle lever, and ensured the sharft was turned clockwise as far as it would go. Am i right in thinking the shaft has a spring on it inside the injector pump which is connected to the governor? Is it possible the covernor could be stuck?

I noticed last night that between the pump and the engine there looks to be a lever which takes a cable, any idea what this is for? and where it should be i.e. fully forward, fully back or in the middle?

thanks

That would be the cold start device.It advances the pump timing slightly.I still think its the spline shaft wrong position.You could take off the lever&spring then start it up checking the spline shaft by turning it to see if the revs go down

I still think its the spline shaft wrong position.You could take off the lever&spring then start it up checking the spline shaft by turning it to see if the revs go down

So do I... it's not a simple setting like a throttle lever on a carb... it's actually a factory setting that can be hard to find again if not scribed up before removal..

The only opther thing that occurs to me is whether it is 'running on oil' , but presumably you would say if it was

a) giving out black/grey smoke by cloudfull

b) not stoppable on the ignition (required stalling)

Gents

Its defo not running on oil, it is stopped via the key everytime.

Any ideas how to reset the throttle then? Is it going to be a case of trial and error to get it right? surely this would not lead to the revs going up to full? There is a how to on the caddy forum which details mods to the governor, it looks simple to remove the top of the pump using this how to is it worth removing the top and inspecting the governor? the shaft does not feel like it connected to anything as without the levers on the shaft just stops at whatever point you turn it too.

Would the cold start lever cause it to rev high?

No the cold start lever woukld not AFAIK

surely this would not lead to the revs going up to full?

Could well seem to, with no-load how could you judge?

If the throttle lever doesn't return have you re-coiled the large (helical) return spring enough, or even latched it up correctly?

Yes, its probably a matter of trial and error to find the correct position.

Did you have trouble keeping everything connected up inside, whilst replacing the top cover - I found this is not an easy operation!

HarryMann wrote:
Did you have trouble keeping everything connected up inside, whilst replacing the top cover - I found this is not an easy operation!

I have not took it apart yet but I am contemplating it. I will have another look at it tonight

Ah, the arm just came off

Seriously...

a) They are sometimes already scribed up (look very closely)

b) Is the spring connected properly, or was that (one) reason the arm was off?

I removed the original throttle lever setup to replace with the old levers off my 1.6D engine, in hindsight it was foolish before I started the engine to check it ran ok in the van. Caused a whole load of trouble, I will remove the levers and start the engine then I can adjust the knob by hand and see what difference it makes.

Right its sorted, as you suspected the throttle position was incorrect, I followed the caddyforum how to for removing the top on the injector pump, removed it so I could determine what the throttle was doing, the throttle was working but backwards on the can if you get me, anyhow all sorted ticks over, now gotta fill up the water in the rad.

Moral of story - mark throttle position before moving the arm!

thanks for help

the throttle was working but backwards on the can if you get me

Not exactly...

But good result anyway!