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FiftyOne

Speedo Not Working?

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twice this week the speedo on the dash hasn't been working correctly (eg, doesn't even move!) If I pull over, isolate the car & restart & seems to come good. I've also been having intermittant issues with the boost gauge too. Thinking it could be canbus related?? any ideas anyone?

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Had a bf, under load speedo would drop to 0, car would splatter!

Done some research found a post where a guy spent over $5K on parts. Abs module, ecu, abs sensors and so on, only to not find the issue! He goes to ftg who suggest new coils and bam!!!! Fixed. So I tried coils and problem was gone :)

May sound weird but coils will cause wacky issues.

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I should add that mine would only do it under load. Speedo would cut out, dash lights flash, stability control light would stay on and the part that freaked me out most - the zf would jump into neutral. One of the coils must have been arching (or shorting out) and causing a spike in the can bus.

Edited by spook

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Well, it's only money. I can't be assed mucking with something that is intermitent & I have a 1 in 6 chance of MAYBE finding. For a little extra cost on OEM coils I just got some weaponX units. [FlameSuitOn] I know there is mixed opinion on the upgraded coils, I get that. For the furutre upgrades I'll do I don't want potential unreliablity. I'm going for premium equipment, the extra - maybe $125 - for a set over FoMoCo resold units is worth it for the better design of the plug end alone. This new Herrod Voltage booster is also a similar idea re lifting the delivered voltage so I don't really see the difference. Pretty much any excuse to upgrade at this point is fine, so I've gone ahead & got it done. [/WaterProofPants]

But thanks everyone for the insight. Wouldn't have thought coils, but as with mot things auto electrical - #BlackMagic

Edited by FiftyOne

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New plugs & leads in. Pulled the old ones, two of the coils had some sort of 'rust' like stuff around the boot. I think they might have been earthing to the cover or something??

The plugs had "ford" on them, so I assume they are original plugs. A few looked to have orange build up on them around the outside of the outer porcelan.

Low end revs are better. everything seems to be a bit better when just cruising around town. 1L/100k better economy, the boost seems to be a little higher, pulls a bit better. Smoother through the range. idle is better, not by much. Not saying the WepX's are the bitches tits, but what I am saying is that new plugs & coils seem's to have fixed the problem.

coils are simply a better design, boost gauge is now working 100% of the time so I assume one of the coils that was causing an issue isn't a problem anymore. Don't know if the gains I'm seeing are due to a faulty coil/old plugs or more a mental thing, but there is an improvement. Thanks all for helping to diagnose this

Edited by FiftyOne

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Good that you fixed it BUT keep in mind if anything similar happens remove the coils and sell them on feebay for any $ you can get. Then go genuine :) nothing beats genuine, fraud spend millions & millions of dollars on R&D so I assume they no what's good and what's sh*t :)

Good that it's fixed though.

Edited by Kosij

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Another possibility is that your battery is nearly stuffed or has a poor connection. I have a BF Typhoon, I had a couple of occasions years ago where weird things happened, including speedo & odo not working from startup, but if I stopped and restarted the car would come good again. Even though the battery was capable of starting the car, it's low voltage during start would cause the computers not to boot up properly. New battery and problem fixed. I don't recall this ever causing the boost gauge to stop working, but worth a thought. Easy enough to check the condition of your battery, and definitely time for a new one if it's becoming a bit slow to crank/start.

Good luck with it.

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Stock OEM typhoon gauge. Battery is approx 3 years old, has more CCA's than the manufacturers spec. It does seem a little hard to crank in the mornings? Today I had to go for the button twice in fact

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That sounds about how mine was when it was causing issues. It never left me stranded but a bit slower to start. Another thing that may help but won't fix it is to wait til all the dash warning lights have cycled after turning the ignition on but before hitting the start button. I'm not normally patient like that - just turn the key and go straight for the start.

Relates back to the computers booting up properly, if they are up and running before the starter is engaged, they don't experience the voltage drop during the seemingly more critical boot-up phase.

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Anyone able to help? I own a 03 Ba xr6 and the I have recently disconnected the battery and once I connected it back up my Speedo and rev count doesn’t work? Any ideas to why? 

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Bit of an old thread here but I did find the coils assisted in fixing the issues.   I had also found a ground wire around the front of the bay which wasn't secured correctly, so after cleaning it & torquing it back down all has been well ever since.

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