Intermittent fueling issue?

[johnleddo]

No ive not tried that yet. It'll have to be tomorrows job now but I'll definately give it a go thanks

 

[johnleddo]

I loosend the fuel feed to the injectors today and turned the car over for about 5 seconds and no fuel came out. I then loosened the banjo bolt with the mini filter and pumped the primer pump on the fuel filter and diesel came squirting out at the banjo.

Is it possible theres an air lock in the fuel pump? Or would it indicate a problem with the fuel pump itself?

I appologise for all the basic questions but i passed my limit of mechanical knowledge a while ago with this one!

 

[Banshee]

I loosend the fuel feed to the injectors today and turned the car over for about 5 seconds and no fuel came out. I then loosened the banjo bolt with the mini filter and pumped the primer pump on the fuel filter and diesel came squirting out at the banjo.

Is it possible theres an air lock in the fuel pump? Or would it indicate a problem with the fuel pump itself?

I appologise for all the basic questions but i passed my limit of mechanical knowledge a while ago with this one!

Oh no!!!! This sounds like another NATS problem Someone else has had this recently I'm sure

 

[johnleddo]

Oh no!!!! This sounds like another NATS problem Someone else has had this recently I'm sure

What does NATS mean? It sounds expensive!?

 

[Banshee]

What does NATS mean? It sounds expensive!?

It's the NissanAntiTheftSystem

Sounds like the pump is still "armed" and as such will not pump fuel.#

More testing is needed though before we can confirm this

 

[johnleddo]

A friend came round tonight &after a few battery charges we managed to get fuel to the injectors. The engine started relatively easily as well. We left it ticking over but it eventually cut out again started it a few times&it cut out every time sometimes as if it was running out of fuel and others it would just stop dead.

He took the sloenoid out of the fuel pump&removed to plunger to see if the solenoid was at fault however it cut out again with the soleniod plunger removed. I'm going to bypass the priming pump tomorrow to see if that makes a differance incase there is air getting in there.

Other than that am i looking at a new fuel pump?

 

[RJL Services]

sounds to me like it's getting air in somewhere if it starting then cutting out

 

[Banshee]

A friend came round tonight &after a few battery charges we managed to get fuel to the injectors. The engine started relatively easily as well. We left it ticking over but it eventually cut out again started it a few times&it cut out every time sometimes as if it was running out of fuel and others it would just stop dead.

He took the sloenoid out of the fuel pump&removed to plunger to see if the solenoid was at fault however it cut out again with the soleniod plunger removed. I'm going to bypass the priming pump tomorrow to see if that makes a differance incase there is air getting in there.

Other than that am i looking at a new fuel pump?

sounds to me like it's getting air in somewhere if it starting then cutting out

Good news and bad news then, if you got fuel at the injectors then you don't have NATS issues which is a relief!!!

I agree with RJL, sounds like you are drawing in air from somewhere :nenau Filter is a good shout, I've had issues with non sealing filters before. I'd replace the 6mm and 8mm rubber pipes from the filter to the bulkhead pipes for some clear tubing and look for air pockets and work backwards :thumb2

 

[johnleddo]

Clear fuel pipe is on order! Ive tried by passing the priming pump with an inline filter today &dispite my best efforts I've ended up with a bubble of air in the inline filter which i now can't get rid of, so the clear fuel pipes sound like a good idea. I had a look around on ebay for related stuff& found you can get a seal kit for the fuel pump. Has anyone used one of these kits with any success? As i guess its possible my air could be getting in through a perished seal in the pump?

I'll start with the simple stuff, just preparing myself for the worst!

 

[solarman216]

I would be doing a test tank on the roof, say 5 ltr, this will eliminate any air ingress problems, if it runs good like this then you have pipe/filter air leak probs, if it still runs the same then injector pump is the issue, Rick

 

[solarman216]

Alternatively you could put a low pressure "Facit" electric pump in the flow line at the tank, this will put the whole pipe run under positive pressure and so eliminate air problems on the whole system including the injector pump, after a while of running like this any air ingress point will become a leak so much more easily traceable, Rick

 

[johnleddo]

A pump in the diesel flow sounds like a good idea otherwise tracing the leak is a bit of a mine field. Would this need to be wired into the ignition somewhere? It makes sense that it would need to come on at the same time as the ignition and stich off when the ignition did? Just not sure my electrical trickery is good enough to find the right place to attach the positive wire.

 

[RJL Services]

I think what Rick is suggesting is to fit pump temporary to put the system under pressure to find a leak as the fluid will be easier to find than air so straight to battery will be fine rick will tell you the best way if he means permanently to fit it but you would still need to fix leak once you have found it either way:thumb2

 

[panelbeater]

oh dear another hard to define.i fear its the pre pump in the ip as its showing symptoms that i had,changed pump and all ok since.

 

[johnleddo]

I can cope with a temporary set up straight to the battery, ive ordered a pump of ebay for £12 so its definitely worth a try.

Panelbeater when you say pre pump in the ip is that the one in the tank? If so where did you get a replacement from?

 

[panelbeater]

sadly no,not in tank just swirl chamber with return/out feed pipes.
inbuilt into the ip is a suction pump that sucks fuel from the tank.if this fails as mine did the only way to get it running was drip fuel into inlet manifold direct,on os of the inlet manifold turn over and it will run but it stops when fuel stops,if ip is ok it should run like rick says from a high up small tank to go direct to ip inlet pipe.you know fuel gets to banjo also to injectors that were cracked to get air out.
now if stops from direct tank its the ip. sorry to be the bringer of bad news.
rick might have a spare usable ip,he supplied mine.

 

[johnleddo]

Thanks for the info. I can try running it from a tank high up tomorrow whilst i wait for this universal pump to arrive. This might be a silly question but what does ip stand for? Does this refer to the main fuel pump hence the bad news broken ip = new fuel pump required!?

 

[Blocky10]

That's injection pump:thumb2

 

[solarman216]

ip stands for injector pump but these pumps also have the lift pump built in, if the lift pump fails then a work round is to put an electric pump as said before close to the tank, not sure on the 2.7 what the average pressure should be, you may need to rig up an adjustable bleed to the return pipe in order to reduce the pressure if it is too high, all trial and error here I am afraid, Rick

 

[johnleddo]

Thanks for the clarification. The work round would seem like a good option at the minute, i just really need it back on the road!

Maybe i could install the pump near the tank and then one of these ebay item number 301754626103 further up maybe in the engine bay to regulate and adjust the pressure.