Leaking Injector & IC Pump issues

[PhoonFun]

Back again with a few more issues after you guys helped me sort out my turbo coolant lines. Finally got the truck up and running after a long 5 years sitting so I assumed it was gonna have a few more problems. Figured Id just make a single thread rather then clutter up the forum.

Anyway my first issue is I've got an injector (#2 I believe, passenger side front) leaking fuel from the bottom up, IE from the injector bung upwards. It seems to be spitting almost fizzing fairly steady as soon as the rail sees any pressure. Could this be just an o-ring or is the injector possibly cracked? Where might someone find factory replacement injectors?

Second Issue I ran into was after putting a new Johnson IC pump (hot wired), Sport machines Lower IC, and Heater hoses through the fender. For some reason I cant get the pump to turn on, its hot wired from the firewall relay. The factory pump worked just fine albeit slow and weak. So I'm not entirely sure where I should start looking. A second note about proper flow aswell, Ive searched quite a bit to help determine proper flow but for some reason Im still unsure. With a Johnson pump which side is your Suction and Outlet I assumed it was the straight fitting on the end was the suction and the other 90 was the outlet is that correct?

Third issue which might or might not have anything to do with the IC pump issue. I noticed the under hood light would flicker without any real pattern with the truck running. I've installed a brand new battery and double checked the alternator is charging just fine. Haven't had a chance to test the power bank on the firewall yet to see if its receiving adequate voltage.

Any help would be greatly appreciated?:tup:

 

[Pertti K]

Re: Leaking Injector & IC Pump issues

My under hood light does the same. I think it has a mercury(?) position sensor, which may be sensitive for the vibration.

I have also a Johnson pump waiting for installation. Where did you take the voltage for the pump?

 

[PhoonFun]

Re: Leaking Injector & IC Pump issues

Didn't even think about a position sensor for the hood being open, ill have to take a look at that. As far the pump goes, I cut the connector off the old pump and soldered it onto the Johnson pump leads so it would plug back into the factory connector, I had already "hotwired" the IC pump on by grounding the yellow wire at the IC relay on the firewall.

 

[Don W.]

Re: Leaking Injector & IC Pump issues

Anyway my first issue is I've got an injector (#2 I believe, passenger side front) leaking fuel from the bottom up, IE from the injector bung upwards. It seems to be spitting almost fizzing fairly steady as soon as the rail sees any pressure. Could this be just an o-ring or is the injector possibly cracked? Where might someone find factory replacement injectors?

If you're talking about where the inj fits into the manifold there is NO fuel pressure on that 0-ring. It just acts as seal between the inj and the manifold.. There IS fuel pressure on the o-ring where the rail attaches. Look closer, it sounds like the inj itself. It's rare but it happens. Had one myself. Injs are available. After 5 years of not running it's prolly a good to just change them all.:2cents:

 

[Davemc1963]

Re: Leaking Injector & IC Pump issues

Try these, I've just fitted them to my Ty.
STANDARD MOTOR PRODUCTS Part # SK57 $1.37 each ( 6 required to do them all)
STANDARD MOTOR PRODUCTS Part # SK18 $1.99 you'll need these too.
STANDARD MOTOR PRODUCTS Part # SK14 $0.73 2 x injector seals, 1 for your FPR and you'll have a spare.
Prices from Rockauto + delivery.

Re. Pump, Have you wired it the correct way round +/- ? Do you need to uprate the fuse for your new pump? Is your 'Hot wiring' still good/sound? Next, Try wiring it direct to the battery to rule out the wiring and/or the relay.

 

[Slyclone]

Re: Leaking Injector & IC Pump issues

Sounds like the o ring has dry rotted or not doing its job.

When they see liquid/fluid the seal will swell. If dry..will dry out and crack, lose its properties.

5 years? Was the truck stored inside or outside?

 

[PhoonFun]

Re: Leaking Injector & IC Pump issues

Truck has been stored inside for 4 of the 5 years. I'll have to pull the intake plenum to get at the injectors to check for sure, but it doesn't sound like a bad o ring more along the lines of what Don W mentioned as the injector itself is buggered. Reason being where would it be leaking from that would force its way up out of the injector bung on the lower intake, wouldn't the only place fuel be present below the bung be at the injector tip? Where are people sourcing a full set of factory replacement injectors for a decent price?

As far as the pump goes wiring all looks correct, I'll have to double check the fuse and that would be the one behind the alternator?

You guys are awesome as always

 

[fivetodrive]

Re: Leaking Injector & IC Pump issues

I offer an injector exchange service to the syty community. $50 plus shipping and your old injectors gets you a set already flow matched. If the injector is truly bad I will only assess a small core fee for the broken one. ($12)

 

[randy merritt]

Re: Leaking Injector & IC Pump issues

I offer an injector exchange service to the syty community. $50 plus shipping and your old injectors gets you a set already flow matched. If the injector is truly bad I will only assess a small core fee for the broken one. ($12)

This is the way to go IMO.

 

[KDBL1TY]

Re: Leaking Injector & IC Pump issues

Flickering light is more than likely the ground. Try tightening the mount that houses the bulb and the ground on the firewall.

 

[PhoonFun]

Re: Leaking Injector & IC Pump issues

Well I had some time to try and diagnose a few problems, under hood light seemed to just be a ground as a few you pointed out. I checked the fuse behind the alternator and sure enough it was blown, put a new one in it blew as well. So I started looking for shorts couldn't find any until I tested the New Johnson pump I got from Sportmachines, and sure enough the brand new pump is shorting out. It spins a handful of times and then just blows the breaker on my Power Probe. So ill be contacting them shortly and hopefully they can make things right. As far as the injectors go I'll have to wait for the weekend here to dig into that project, but ill keep that in mind fivetodrive. Out of curiosity are the Standard Motor Products FJ65 injectors correct for a stock truck.

Thanks again

 

[Davemc1963]

Re: Leaking Injector & IC Pump issues

According to Standard parts website it is the correct injector. However, I think Aarons offer is the better (best) option if there is doubt about your injector/s integrity. You will also get a matched set.
If I was in your position, that would be my choice.
He's a stand up guy and stands by what he sells. I can personally vouch for that.

 

[PhoonFun]

Re: Leaking Injector & IC Pump issues

Well I couldn't sit still any longer haha :rotf:, between waiting to hear back from Sportmachines about the defunct pump and the uncertainty of the injector I dug into it and got it apart, and I found #2 injector missing 1/3 of the pintle cap. The o rings looked old but not cracked or brittle, so i'm assuming the missing pintle cap was the culprit. Also noticed on #2 and #4 the caps themselves looked to have seen a fair bit of heat.

As far as Aarons offer I have no doubt its more then likely the best option, unfortunately its the turn around time between the shipping back and forth that has me on the fence.

 

[Davemc1963]

Re: Leaking Injector & IC Pump issues

They look pretty crapped up!
Do you think you might have issues with the inlet valves on #2 and #4 causing blowback? The pintles may be crapped up too as well as the caps. The pintles are not easy to clean yourself, as they are pretty delicate and very easy to damage and write off the injector.

Might pay to do a compression check if you haven't done so already. Unless I missed somewhere that you have already.

 

[Don W.]

Re: Leaking Injector & IC Pump issues

If I remember correctly 2 & 4 intake valves are next to each other. Because inj 2 & 4 are so mucked up I'd also have to suggest that the intake manifold gasket is bad. If you've got the upper intake plenum off you're half way there.

None of this explains your original issue of fuel coming from #2 inj. Something we're forgetting is that with the engine off and the key on the pump runs for 2 secs then stops. There should not be any fuel at the bottom of the inj. Or anywhere else for that matter. Based on your description and the pics of 2 & 4 those injs may be stuck open. Regardless new/rebuilt/matched injs are required.

 

[PhoonFun]

Re: Leaking Injector & IC Pump issues

I've spoken with Aaron and we've set the exchange in motion, so here's hoping to have a set show up in the next couple weeks. I will be redoing the intake gaskets after pulling the plenum off and having the gasket near disintegrate in the process it only seemed logical to do the lower intake aswell if its anywhere near as bad. I've done a compression check years ago and all seemed in good order, maybe its time to do another.