hi now ive finally got the 306 dt to start again it idles very rough and pushes out lots of white smoke, also when idleing the fuel primer has no pressure in it at all it's just soft and no pressure will build in it by pumping, does this indicate an air leak if so where is the likely source? i didn't replace the o ring on the fuel filter housing so im suspecting this is the fualt? also i think there may have been water in the diesel i put in would this explain the smoking? could anything else be at fault?
cheers
chris
|
Sounds like the pump injector sprocket is out by a tooth. Need to use a torch to put cranked 8mmm bolt in flywheel and 10mm bolts in cam and injector sprockets. Or could be bad air leak.
If it's got air in should see bubbles in clear pipe between filter and pump.
|
could you tell me where the clear pipe between pump and filter is please
chris
|
My money's on the pump timing being out too. Time to get the belt covers off and check it again. It's very easy to get the belt on a tooth out on the injection pump. Probably explains why you had difficulty starting it after putting the head back on too.
--
RichardW
Is it illogical? It must be Citroen....
|
all the markings line up so definately ok on that front just suspecting that water in the diesel and an air leak are causing the rough running
cheers
chris
|
Chris...The pipe between the filter and pump is clear plastic on 97 on 306's DT's i have seen with lucas injection system. If yours is an earlier engine or has Bosch pump it might not be fitted.
Known timing marks to line up perfectly and timing error caused by worn/damaged key between shaft and sprocket so might be worth a look if they were disturbed during the rebuild.
Water usually all collects in filter canister then when its full causes engine to stop in my experience but could be causing your problem.
|
mines 96 and has no clear pipe unfortunately but is definately a lucas pump, theres certainly an air leak as the primer is holding no pressure which im sure is the fuel filter o ring as it wasn't renewed and it's a common area for leaks
cheers
chris
|
The fuel primer is not expected to hold pressure whilst the engine is running, as fuel is flowing through it. It should only hold pressure when the engine is off, and the primer is pumped a few times, after which it should stay hard.
If you had a fuel leak or air getting into the system, you would have difficulty starting the engine after being switching off for a while (due to air ingres/ fuel leak).
Does white smoke indicate over fuelling? If its a turbo, check the tube that runs from the intercooler to the injector pump for any leaks.
|
there is actually a split in the tube you mention but im picking up a new one 2mrw so that means ill put most of my issues down to water in the diesel which is a known cause of white smoke and also would explain the rough idle
cheers
chris
|
|
|
|
ok think im starting to make progress at last, current problem is still rough idle, poor starting and lots of white smoke continuesly.
glow plugs are new and work fine, i have now ran a clear pipe from the primer direct to the injection pump and bled all the air out, the reason for this is to eliminate any air leaks caused through the filter setup. after doing this the engine is still running rough and lacks any power but now starts pretty much first turn of the key, when first started it seems fine for about 5 seconds then sounds like it's missing on 1 or more cylinders, i know the headgasket is fine as the water system is now depressuring properly after the car has been ran, Am i correct in assuming that the only causes now should be either incorrect valve clearences or timing? the timing is still spot on according to the timing marks so im beleiving to be ok for now, can anybody else think of anything else that could cause these problems that ive missed? the intercooler/inlet manifold gasket is leaking despite replacing the gasket will this contribute to the problem at all?
cheers
chris
|
|
Have you checked for water in the diesel? white smoke can indicate water in the fuel system.Your leaking joint between the intercooler and inlet manifold will cause power loss as its meant to be a sealed system.
|
|
|
Running a clear pipe direct from primer to injection pump is risky (bypassing fuel filter). Just in case there is muck in your tank and it gets into your pump.
The clear pipe from filter to pump, should help you identify any air getting into the system (eg no bubbles is a good sign).
What happens when you rev it? Are the revs more limited? Just in case its a fuel starvation problem.
Are you losing any coolant?
|
ok time for a moment of shame, having checked the valve clearences i found i got the shims for the inlet and exhaust the wrong way round on cylinder 1 so that coupled with the replaced boost pipe should hopefully rectify problems
chris
|
|
|
|
|
