Dead engine?

[twoquik]

no good gordo but what a perfect opportunity to chuck in a rb26

[Chris32]

I've got a dodgy injector plug that tends to play up every so often.

The wiring loom injetor plug has split, water gets in and causes a bad connection.

Every now and again it gets hard to start and runs on 5cyls until its warm.

Playing with the injector will instantly get it running on 6 again.

Looking at the plug the contacts get corroded as all buggery. Clean it up and its all good again for another 6months.

It also tends to play up more often if I park the car on grass overnight.

Mine does that occasionly as well, I will have to check mine.....

[Bobjones]

I was about to say a collapsed ring in #3, then I read that you had it back up...

Unsure how you can "unstick" a sticky valve when jiggling the ignitor...but hey.

As for the low compression test, yes a stuck open valve WILL give a lower compression reading, a leak down test shoudl then be done to find out why.

As for why it now has compression of 120psi, I have NFI, sometimes they stick but I would be running a flush through it, RB20's have hydraulic lifters and as such it might be the cause the the stuck valve...I am only assuming cause I cannot hear it nor look at it...

[46n2]

boostn32...change yiur avatar, i keep seeing yous and thinking its an old thread as thats my old avatar:)    TP for my bunghole?

Bugger to hear about all the RB20 dramas the past week, hope it is just an electrical gremlin...and engine flush is cheap and easy, may not do anything, but then again?

I hope it is something electrical :wizard:

haha yeah i second that motion...i read that you blew a piston and first glance i though it was roy

[predator]

*** FINALLY FIXED!! ***

Fuel pump rooted.. long version below

Finally fixed the damn thing.. After trying I don't know how many things. Narrowed it (properly) down to a fueling problem. So I started with replacing the fuel pressure reg and fuel filter (hmm, JECS orignal..lol) .. but after a 15 min drive discovered it wasn't either of those things.

So into the fuel tank I went. I installed a Walbro about 6 months ago - and that has been fine up until now. Checked wiring, and pump seating, appeared to be ok.. But, on checking over things closely, finally found the problem. Basically the Walbro supplied sock had crumbled (plastic - er great idea), and parts of itself appear to have sucked itself into the pump itself. It has some sort of foam stuff, but that also appears to have crumbled. A very bad design. After 6 months of use, that is inexcusable. I've always run good fuel, the tank was fairly clean, so I don't think it was anything else getting sucked in.

Now I am not *entirely* sure the sock is wholy the problem (but it wouldn't help).. and I think the pump may have slowly shat itself as well. I have noticed some irregular priming sounds when turning the key over occasionally. So I am also thinking that within about 6 months the brand new Walbro has gone dicky.

I knew that they were only good for about 250rwkw or so, but the long term reliability now I have some strong concerns about. My personal opinion is that *everybody* should stay clear of the Walbro pumps. It's not worth messing with, even if you may save $100 or so. Get a Bosch.

So back in went the stocker unit.. Car seems to pull a lot stronger now, and all issues gone. I'm going to be getting a BOSCH next time when i actually hit the stock pump limits. Learned my lesson.

I'm just glad it happened whilst my car is still running fairly mild power levels, and not once the bigger turbo was on - or it would have been goodbye rb20.

p.s. rb20det and rb25det seem to have the same fpr, even though they have different part numbers.

[Cubes]

hahah.. Isn't that a relief.

[predator]

Yup sure good to have it all working fine again.. I had sort of discounted fuel pump because I thought "pretty new pump, should all be fine".. I even checked it quickly, but didn't pull the whole thing out to look over it fully :-s

I've taken a few photos, you can see some of the crumbly rubbish, even worse you can see it would have been clearly sucking it into the pump itself..

[superspit]

well done Pred, great thread guys, proffessionally handled and the steps gone thru may actually save some poor sod's money, or Aorta heart valve!!

I won't forget this one!

Up the liner's!!

[Chris32]

Good to hear its sorted!

Hopefully none of the crap it sucked up made it past your fuel filter into your injectors

[Bobjones]

Glad to see its sorted Gordo,

Seems I will be getting the 040 instead of the Walbro...

I think it may be an idea to send them a letter and pictures of the offending pump, cause that really is inexcuseable!!!

[predator]

Think the fuel filter should have stopped most of it getting into the injectors and the engine itself. Thankfully!

I could do that I guess, but buying from another forum member (a while ago), without receipt, etc not much chance of a refund from the manufacturer.. They'll probably blame "installation error" rather than pump error, or something like "we've had a lot of people install these pumps without any reported problems". I think they are in the US.

Probably not much I could do there, but my thoughts are that the plastic has clearly started to get brittle and eaten away because of the petrol. It did start off soft and spongey. But I couldn't say conclusively.

The solution I guess is to not use the supplied sock at all, and just to run a direct hose to the bottom of the tank (no sock) and just hope your fuel filter is doing its job.

[Roy]

Did you ever run any toluene or any other funny stuff?

[Silver_r33]

I'm pretty sure you *do* still want a sock on there so that the larger particles dont get in the inner workings of your pump and wear it away prematurely - maybe try to get a new genuine Nissan part and attach that? AFAIK the fuel filter will catch the smaller particles (the ones that screw with the tigher tolerances of the injectors) than the sock does.

[predator]

Did you ever run any toluene or any other funny stuff?

nope.. 6 months.. about 5000km (haven't need to drive much this year).

Silver_r33.. I could try and attach the nissan sock to the bottom (much better designed), but basically I think I've pretty much given up using the walbro. It can go in the bin as far as I am concerned.

anyhow, enough crapping on.. but its an interesting one.

[Squizz]

I installed a Walbro into the gtr but retained the "stock sock" and it's hasn't missed a beat. The walbro sock is stupidly small and I wouldn't have used it in the first place.

[RaseR]

Great investigative work predator, I installed a Walbro in my R32 around 10,000kms ago....soon I probably would have had to go through the same process as you did, at first thinking my motor was blown........hmmm, best be pulling it out to check out the condition of the filter sock this weekend methinks!