Wait/Water in Fuel light Q

[l1a1man]

Ok, Did some work on her with fuses, relays etc. Have had the wait light and water in fuel light come on even when warm and driving ( they are dim) but do a flickering thing off and on together and at diffrent times. Also have been hearing chatter behind them too. Any ideas?

 

[Sgt Hulka]

Yes. I went through a very similar scenario chronicled here on SS recently. I can't speak to the connection between the work you did and problems you're having, but I can tell you my problem was ultimately a flakey GP controller card. Weird wait light behavior and a chattering relay... I did not experience the water in fuel light behavior though... Good luck!!!!!!

 

[Stihl029]

Mine two was a glowplug control card with a fried IC, Q2 and diode

 

[Sgt Hulka]

Hey Stihl029,

How did you diagnose that? Would love to have that data "in the bank." BTW, I have an 026...

 

[Cucvnut]

how do you tell if your GP card chatters ?

 

[Sgt Hulka]

Yikes. here we go... The GP Relay and the GP controller card are two very different things. The GP relay is located on the engine compartment firewall on the drivers side. The controller card is, well, you know, inside under the dash. A failing GP controller card can cause the GP relay to "chatter" close on and off real fast that you can hear in the driver's seat... The card can't chatter, it has no mechanical parts.

 

[Cucvnut]

like a ticking sound ? all the time behind the dash ?

 

[Sgt Hulka]

Yup. That's it.

 

[Cucvnut]

so i need a new card i take it ? how much are thoes ?

 

[Sgt Hulka]

GP cards are unfortunately getting pricey. 150 - 300 new on Ebay... I'll PM you...

 

[l1a1man]

Yes, a clicking sound. Some rapid some not. Once the truck is warm, it stops. Now i had these before replacing the GP relay, GP's, voltmeter fuse, and GP starter relay. Cleaned up the card housing so just need to wait for my next card to show up and hope it is cured. Will have to see if the board can be rebuilt. The lights continue to flicker off and on though.

 

[Sgt Hulka]

You're tracking it down. Stay with it. GP card will be the key.

best!

 

[Stihl029]

Hey Stihl029,

How did you diagnose that? Would love to have that data "in the bank." BTW, I have an 026...

Sarge here is how I figured it out.

 

[Sgt Hulka]

LOL! Mine didn't look like that! Thanks!

 

[l1a1man]

OK everyone. After all that work I went out and started her up and she ran great. Started better than before. This morning I go out and lots of white smoke, excellent cranking, but no start? Where should i look now?

 

[4bogginchevys]

did you pull out the controller card and verify that it did not get cooked again??

 

[l1a1man]

No, Put a new one in today after I tried to start and still a no go. Going to pul a GP and make sure it is ok. I noticed it is leaking fuel from the bottom of the fuel filter and the peticock is tight. How to I swap filters and make sure no air gets in?

 

[Sgt Hulka]

Swapping the filter is a no brainer. Just release the top and bottom clips and remove and replace. Check the TMs. Be careful though. Move the filter straight in and out over the input and output pipes. HOWEVER, it's very possible the leak is coming from the filter base. They must be replaced are available from a few sources including ebay. And yes, this could very well be part or all of your starting problem. Hang in there!

 

[Sgt Hulka]

Sorry, I may have led you astray initially. And I'm still concerned about the wait light behavior. But the air/fuel leak-filter base flaw can exhibit those symptoms and create a hard start condition. I went through the whole merry chase myself, and needed both the GP card and the fuel filter base (and a new fuel filter).

 

[l1a1man]

Just found the new GP's are buldged!! What would cause this and how do I get them out??