# Simulate bundle problem

**URL:** https://collective.flashbots.net/t/simulate-bundle-problem/2768
**Category:** The Flashbots Ship
**Tags:** pbs, question
**Created:** [December 3, 2023, 3:34pm UTC](https://collective.flashbots.net/t/simulate-bundle-problem/2768 "2023-12-03T15:34:03Z")
**Posts on this page:** 1
**Page:** 1

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### Author: ![Daddy](https://collective.flashbots.net/letter_avatar_proxy/v4/letter/d/cab0a1/32.png) [@Daddy](https://collective.flashbots.net/u/Daddy)
#### Post date: [December 3, 2023, 3:34pm UTC](https://collective.flashbots.net/t/simulate-bundle-problem/2768/1 "2023-12-03T15:34:03Z")

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Hi everyone.

I am having some trouble with flashbot. I am building a tx and sending it with flashbot, but the weird thing is when I simulate the bundle to check if everything is fine, the gas price I put in my tx is not the same as the simulation one, do you know why? Has anyone experienced this problem too?

BTW, I tested on goerli and everything was fine but now on the mainnet I have this problem.

For example, the gas price in my tx is : 34651289999 wei  
But in the bundle simulation i have this: gas\_price: 7923

If i check juste after the simulation, the transaction gas price is 34651289999, so is it just a simulation display problem? Or something else?

Thank you very much in advance for your help and have a great day everyone.

Daddy