Truck issues: help!

"Cash Rewards" (cashrewards) 05/07/2018 at 09:39 • Filed to: None

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I’ve been having a RPM specific vibration on my V6 Tundra. Right around 1500 rpm I get a shake. Let off the gas or give it more gas, goes away? Thoughts?

Yesterday, a turn signal light started freaking out on the dash. All turn signals seem to be working. Then ABS came on

Turn signal solidly lit, not flashing

I think that above mentioned rattle had just shaken some connections loose. I hope. If not, what do you think?

pip bip - choose Corrour > Cash Rewards 05/07/2018 at 09:53

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tail shaft uni / rubber coupling?

BrianGriffin thinks “reliable” is just a state of mind > Cash Rewards 05/07/2018 at 09:57

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Misfire perhaps? Might even be a loose connection on a coil/spark plug wire.

Cash Rewards > pip bip - choose Corrour 05/07/2018 at 09:57

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How would I check?

pip bip - choose Corrour > Cash Rewards 05/07/2018 at 10:00

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climb under and check shaft for excessive movement.

diplodicus > Cash Rewards 05/07/2018 at 10:13

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Check your plugs.

Cash Rewards > BrianGriffin thinks “reliable” is just a state of mind 05/07/2018 at 10:17

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Why at that small rpm range? When I give it gas, it pulls smooth and strong.

sony1492 > Cash Rewards 05/07/2018 at 10:48

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Because the dwell period increases with rpm so the voltage increases. If there’s a large plug gap or excessive plug wire resistance the voltage might not be enough to overcome that resistance until a higher rpm. Though the problem may not be a misfire, it is the first thought because the main reason a motor shakes is when it’s unbalanced from a missing cylinder.

Did it sound different at 1500?

How violent was the shake?

Did it lose any power?

Cash Rewards > sony1492 05/07/2018 at 10:54

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It only really happens when the engine is lugging along when you’re done accelerating, and it settles down to that rpm. More gas or foot off the gas makes it go away. It it’s avery noticble shake. Interesting point on the voltage increase, thanks!

sony1492 > Cash Rewards 05/07/2018 at 11:07

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High load and low rpm can also cause misfires on a weak ignition system.

I’d check your ignition system, maybe do a full on tuneup, plugs, wires, fuel filter, cap & rotor if you have them.

Cash Rewards > sony1492 05/07/2018 at 11:39

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Its a coil on plug setup. All the wires look connected, battery terminal connection is clean. Plugs are new from dealer. Coils not new. Shouldn’t I get a CEL on misfire?

If only EssExTee could be so grossly incandescent > Cash Rewards 05/07/2018 at 12:03

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Does it happen in every gear?

Cash Rewards > If only EssExTee could be so grossly incandescent 05/07/2018 at 12:29

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Not sure. Next step is turn over drive off and see what I get.

sony1492 > Cash Rewards 05/07/2018 at 16:32

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The CEL will only turn on once the computer has counted a certain number of misfires.

But as someone else has said it could be the driveshaft bushing thing

brianbrannon > Cash Rewards 05/09/2018 at 21:58

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Grease the driveshaft