just cant get it to go hard.... fuel filter primer that is.

[legendgamesmaster]

'92 2.4 running on biofuel

Right, I have changed the fuel filter, which was a doddle. I filled the new filter up with clean fuel before final screw on, and then pumped the primer. and pumped and pumped and pumped...... and I cant get it to go hard.

Truck fires up, grumbles, splutters, dies. I guess its air in the filter.
Could it be that I have a fcuked primer? Or do I need to pump it baby, pump it... for AGES???

The black cap is broken off, so the screw is held up by a large washer, which in effect acts like the black plastic button, so shouldnt make any odds. It does plunge down OK, and the spring returns it OK too.

Anyone got a spare filter top (the whole thing with bolts 'n' all) they want to sell me?

Any sage advise on this matter?

[Morr]

'92 2.4 running on biofuel

Right, I have changed the fuel filter, which was a doddle. I filled the new filter up with clean fuel before final screw on, and then pumped the primer. and pumped and pumped and pumped...... and I cant get it to go hard.

Truck fires up, grumbles, splutters, dies. I guess its air in the filter.
Could it be that I have a fcuked primer? Or do I need to pump it baby, pump it... for AGES???

The black cap is broken off, so the screw is held up by a large washer, which in effect acts like the black plastic button, so shouldnt make any odds. It does plunge down OK, and the spring returns it OK too.

Anyone got a spare filter top (the whole thing with bolts 'n' all) they want to sell me?

Any sage advise on this matter?

Remove the filter once more, and check the seal at the top, if there's any grit or dirt on it or unser it, it may prevent it sealing properly causing an air leak, also look at the seal seat area in the filter housing to make sure its clean. Coat the seal on all faces before refitting with a thin smear of fuel or oil to aid sealing.

If this is all ok, it could be that your primer pump is knackered. You can try bleeding the air by slightly loosining one of the lines at the injectors whilst cranking the engine.

[legendgamesmaster]

now its hard, but still wont fire up

OK folks, I wasnt pushing the plunger down far enough. Now it goes hard with a few pumps. there is plenty of fuel flowing freely, but she still fails to fire up.

just turns over - no smoke out the exhaust, just as if its out of fuel.

I bet if I go out in an hour or so, whe'll start first time..... sounds very similar to Razorhoofs problems.

TonyN - any ideas as to why this could be happening?

air filter is new, fuel filter is new, was very low on fuel and the last filter had quite a bit of water in it, however if i pull the fuel pipe off and pump the primer I get nice clear fuel coming out.

I dunno, thought diesels were easy!!??

[stormforce]

Have you tried cranking it over with one of the injectors slackened off incase there is air in them

[legendgamesmaster]

injectors

just seen both injector replies... ooh, no. thats a new one on me. So, er, where exactly can i find the injectors? is it obvious? i'll give it a bash tomoz.

ta.

[stormforce]

just seen both injector replies... ooh, no. thats a new one on me. So, er, where exactly can i find the injectors? is it obvious? i'll give it a bash tomoz.

ta.

right hand side of engine as you stand at the front.hope you can make this pic out ok as there are 4 of these pipes and only 1 in the pic

[legendgamesmaster]

gottcha. am i right in thinking that an air lock in the pump might prevent adequete fuel delivery? and by slackening off the injector, the air bleeds out, and fuel delivey is resumed?

[stormforce]

gottcha. am i right in thinking that an air lock in the pump might prevent adequete fuel delivery? and by slackening off the injector, the air bleeds out, and fuel delivey is resumed?

something like that yea.I had to do the same on an old tractor every so often aswell

[Sim1964]

Try priming her with the igniion turned on to allow fuel past the solenoid.

[The Hornet]

I had exactly the same probem today. I had put the pipes back on the wrong way round I'm gonna mark them with tippex next time I remove them

[AndyLala]

If all the rest of this sage advise fails... clean the primer head thoroughly (?) and make sure its nice a dry, so you can see any leaks... Had the same thing... turned out to be a cracked primer head (fine crack)... swapped one from one of Jottos breakers... worked a treat... till that one cracked the other day... (pants) ended up buying a new one from Roughtrax... filled it with injector cleaner.. and primed it.. and it worked a treat.

symptoms: slowly became harder to start from cold. It wouldn't hold the pressure to feed the pump till the engine fired up... remember that the fuel pump drags the fuel from the tank... so if you got no pressure on the line to start with... so pump it furiously... oooh err missus...

[legendgamesmaster]

here's a question then....

if the fuel pipe from the filter to the pump is removed from the filter and connected to a large bottle of fuel, held up like a medical drip, it should start OK?

i don't understand the problem. starts fine from cold, first time, but run it for a while and then try to start again, and nadda, nowt, nuthin....

I am going to try all the suggestions tomoz.

[NiftyNev]

i don't understand the problem. starts fine from cold, first time, but run it for a while and then try to start again, and nadda, nowt, nuthin....

If cold start is fine I would suspect seals are allowing air to enter the pump when warmed up. If it starts ok with the bottle of fuel when engine is warm then there could be a problem with fuel supply between tank and filter, although I doubt this would happen only when warm, unless the vent is blocked and causing a vacuum in the tank, which could dissipate when vehicle is left standing for a period of time.

Nev

[legendgamesmaster]

arp arp arp....

hey Nev,

the seal thing sounds plausible. There WAS tank vacuum, well WAS since I now have a small breather hole drilled in the cap...

In your experience, is it the filter seals or pump seals that go?

And would it be better to replace them with sea-lions? All the documentaries Ive seen seem to show sea lions have more capability that seals. They can do all kinds of sh!t like hold a ball on their nose and clap with their flippers and everything.... All seals seem to be able to do is, er, blow.

You ever hear about that penguin with white stuff all over him? He'd blown a seal..... ha ha ha... Well, it was funny when I was 14.

[legendgamesmaster]

further conundrums

Got it started, ran for 10 mins till hot. turned off. wait 2 mins, wouldnt start. hosed it down with cold water (just over the pump) for 2 mins and it then started. bizarre. that backed up the 'only happens when its hot' theory.

anyway, was running fine, after that, but then wouldnt re-start even when cold.

undid an injector, and turned it over. fuel just kinda dribbled out - I was under the impression it should be under high pressure. checked filter primer and it does appear there are some hairline cracks, but its hard to tell if they are actually cracks and if they would make any difference anyway.

tried fitting a bottle of fuel to the pump 'in' pipe but it really didnt draw any fuel.

Looks like a pump issue then, with a primer fault as a secondary issue.

I'm going in search of pump diagrams now. anyone any ideas? is there a solenoid on the pump or a valve that might be stuck?

anyhow, thats the current situation!