Motor knock/rattle low rpm....?

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Sandfreak520

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Hey guys my truck just started acting up today. When I let the truck just coast rolling then get back in the power it makes a rattle/ clack sound coming from what sounds like motor etc ..... hard to tell with the exhaust too loud lol.. but it was right when I left the house weather is a little cooler 46 when I left as I drove more it was harder to reproduce the sound it’s only under low rpm when I let off throttle for a second or 2 then back in it 1/4-1/2 throttle click clack click clack right when truck starts to accelerate the more pedal I give the faster the rattle goes away... wtf?? Any thoughts no engine lights oil level all good 98k on truck.... ‍♂️
 

smurfslayer

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can you repeat the test but switch to 4wd or add for a Gen2?

sounds like the dreaded IWE failure.
 
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Sandfreak520

Sandfreak520

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can you repeat the test but switch to 4wd or add for a Gen2?

sounds like the dreaded IWE failure.

The IWE? Dumb question but what is that? And I didn’t try 4x4 this was first time I’ve heard anything funny from my truck. And the only thing I did differently today was I did not let it warm up the 2-3 mini usually do once temps drop below 50. Just hopped in and left since i was running late.
 
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Sandfreak520

Sandfreak520

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Update wife drove the truck and put fuel in it...... 87 octane and I’m running 5 star 91 street tune...... I am 99% sure the low octane and my 91 tune coupled with lower temps today were my issue..... oh and she isn’t allowed to drive my truck anymore... haha
 
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