Weird no start condition
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Rock Crawling
Joined: Oct 2015
Posts: 258
Likes: 16
Weird no start condition
Stopped at a circle k today on way home and when I attempted to restart my Disco.... nothing. A few more attempts at starting and it cranked but I heard a rapid ticking I thought was coming from under the glove box.
Popped the hood and it turns out the ticking was the injectors firing off when the key was in position two, last stop before turning to start? Checked fuel rail and no fuel from valve. Now I put in a good quality pump a few months back and it’s been perfect.
Now here’s the part that scares me. I put in my code reader to see if anything came up and it repeatedly could not connect.
After about out an hour of occasionally trying to start, keeping battery drain in mind, it started up. I’ve been home and restarted it several times without issue.
I should add it’s been rainy as hell all day.
I have these recurring thoughts, and did at the time, like it just felt like something needed to dry out, something was wet that shouldn’t be.
My thinking is maybe condensation inside the computer? I can’t think of anything else that could cause all these symptoms at once.
Is there a relay maybe at play?
Any ideas fellas?
Popped the hood and it turns out the ticking was the injectors firing off when the key was in position two, last stop before turning to start? Checked fuel rail and no fuel from valve. Now I put in a good quality pump a few months back and it’s been perfect.
Now here’s the part that scares me. I put in my code reader to see if anything came up and it repeatedly could not connect.
After about out an hour of occasionally trying to start, keeping battery drain in mind, it started up. I’ve been home and restarted it several times without issue.
I should add it’s been rainy as hell all day.
I have these recurring thoughts, and did at the time, like it just felt like something needed to dry out, something was wet that shouldn’t be.
My thinking is maybe condensation inside the computer? I can’t think of anything else that could cause all these symptoms at once.
Is there a relay maybe at play?
Any ideas fellas?
Camel Trophy
Joined: Jan 2010
Posts: 4,245
Likes: 402
From: Traverse City MI
If you suspect the ECU remove the covers, you'll see evidence of moisture even if it's dry now. I'd say your instinct is correct, probably water but the problem is not a common fault, more like a rare occurance and it did eventually start so there goes on the spot troubleshooting. Do your inner fenders to floorboards have rot and possibly holes in them? Relays for many things are right behind both kick panels..... I'd make sure your not getting water intrusion there. The other spot that leaks is right under the cowel cover, there's a panel seam, a hole there will leak on electronics behind the glovebox.
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Rock Crawling
Joined: Oct 2015
Posts: 258
Likes: 16
Well turns out there was clicking under the glove box. One of the yellow relays, don’t know which one yet, was just clicking away with the key in the on position also. Replaced it with two others and it’s still clicked. Got the idea to pull the wiring off the fuel relay under the hood and blow some air around the terminals and wiring. Sure enough it then started right up and is still starting okay.
May just grab a new fuel relay this week. Not sure how that caused the injectors to fire and why I had no comms to the computer? But at least I can start the truck.
May just grab a new fuel relay this week. Not sure how that caused the injectors to fire and why I had no comms to the computer? But at least I can start the truck.
Camel Trophy
Joined: Jan 2010
Posts: 4,245
Likes: 402
From: Traverse City MI
Last edited by ihscouts; May 17, 2018 at 07:28 PM.
Camel Trophy
Joined: Jan 2010
Posts: 4,245
Likes: 402
From: Traverse City MI
I should add that LPS 1 and 3 are what you want. Lots of contacts/switches can be cleaned up on a Disco with LPS 3 and it's good for cleaning electronics boards you might solder to or reduce bridging. LPS 1 is good for plastics and lubing up all kinds of things you don't want to attract dirt to including switch gear. My Dad used LPS products as an Electrician and I used it in the Military. I just used LPS 1 to clean up a bunch of engine plastics on my Jeep. I used LPS 3 to clean all the grounds on same Jeep after scuffing them up with Scotch-Brite Stainless Steel pads (which are excellent for any bare metal working/finishing). Tricks of the Trades.......
Thread Starter
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Rock Crawling
Joined: Oct 2015
Posts: 258
Likes: 16
I should add that LPS 1 and 3 are what you want. Lots of contacts/switches can be cleaned up on a Disco with LPS 3 and it's good for cleaning electronics boards you might solder to or reduce bridging. LPS 1 is good for plastics and lubing up all kinds of things you don't want to attract dirt to including switch gear. My Dad used LPS products as an Electrician and I used it in the Military. I just used LPS 1 to clean up a bunch of engine plastics on my Jeep. I used LPS 3 to clean all the grounds on same Jeep after scuffing them up with Scotch-Brite Stainless Steel pads (which are excellent for any bare metal working/finishing). Tricks of the Trades.......
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