It is more probably one of the mods you have installed that requires the ASI loader. Which, if you are using the mods folder, is pretty much every single mod. Disable/remove each mod individually until you find the problematic one.

As a first test, try renaming the mods folder to something else to disable it, then check if the error occurs. If it still occurs, try renaming the scripts folder to something else to disable, and check again.
If disabling one of these folders fixes the problem, go into the folder and disable mods individually.
If disabling these folders didn't fix the problem, try disabling .asi mods individually by renaming them.

The mod is open-source, and the source code was updated 16 days ago. You could try compiling the mod to see if the problem is fixed on the latest code: https://github.com/E66666666/GTAVSpeedo

@bur587
Possibly a modkit ID conflict (two or more vehicles using the same carcols/carvariations modkit ID number/s) or something wrong in your 'carcols.meta' or 'carvariations.meta' files.

ModKit ID Conflict (diagnosis):
In 'carvariations.meta', set this for both the bikes:

<kits> <Item>0_bike_modkit</Item> </kits>

If you get your engine upgrades back after doing that you have a modkit ID conflict.
Unfortunately, due to the way Rockstar did ModkitID's the best approach I know of is to change the numbers until you find one/s that work. Can be a right pain in the hoop if you have lots of add-on vehicles .

See more info & the basics of fixing a modlit ID conflict here.

If you rule out a modkiID conflict, upload the entire 'dlc.rpf' somewhere & I'll download it & take a look

@mrwallace888
I missed that too (& I'm supposed to know what I am doing?! lol).
One day I'll actually have to look at the settings/options in Trainers so I don't miss the simple stuff
Glad you got it fixed anyway, the solution is all that matters at the end of the day

@POSEIDONxxR
That's a very broad question, but generally, a replacement vehicle will spawn on the streets just like the vehicle it replaces did & an add-on vehicle require a trainer to spawn it. Create your own thread with more specifics & you'll undoubtedly get a more detailed answer

@Algonquin1234 Yes exactly.

Hunk's Expansion edited to fix dealer placement when up north on map(though they may spawn in strange places) and the strap being visible when bag is changed position and character gotten done getting out of vehicle with a putaway bag (not stashed). Still have to fix strap into being invisible when exiting ammunation menu

https://pastebin.com/4J4J4wQW

Future updates planned include: glove inventory count (purchasable from dealer), sitting function, Assault rifle to cellphone animation bug fix(which I think is caused by custom weapon holding animation) and weapon count limit when not wearing bag so that the player can pick up one big weapon at a time, but drops them if he/she switches to unarmed/secondary

Update 2/9/2020: https://paste.ee/p/oJtIj
Strap fixed

Are your scripts in the scripts folder? If not, create one in the main GTA V Folder called "scripts" and put them there. Make sure you're using Scripthook and Community Script Hook V .NET, the first will keep your modded game from going online, and the second will maybe fix your problems.

I think this should be in "General Modding Discussion" but ok. He's using LSDP:FR and lot of its plugins.

Here's link for LSPDFR:
https://www.lcpdfr.com/downloads/gta5mods/g17media/7792-lspd-first-response/

@Chillaz5K
Have a read over this thread (similar issue, 'clr.dll'), might be something in it that helps

@Algonquin1234
ofc, the scripts folder was completly deleted and it continues to be laggy

[WIP] The Diamond Casino & Resort
[WIP] Grand Theft Auto : Nightclub Business
[WIP] Grand Theft Auto : Rags And Riches (Mile High Club)

Can't wait to play any one of them

anyone find a fix yet? I keep receiving errors about the game memory even though I followed these steps. I also downloaded https://www.gta5-mods.com/misc/anti-crash-hotfix-for-replace-cars#comments_tab to see if that would help but it did not. I just want to simply replace all GTA 5 traffic vehicles with (not even tuned) real-life vehicles. There should be a way to do this. I see youtube videos that have been able to accomplish that so what's the gig?

@PermissionToLand
Yeah, 'fDeformationDamageMult' is how much the vehicle deforms in an impact.
fCollisionDamageMult influences how much damage the vehicle recieves from impacts & works in combination with 'fEngineDamageMult' to calculate the overall damage value.
If you set fCollisionDamageMult to 99999.9999 you'll see it

@Acknod you haven't uploaded a file

there's also a specific topic for files pending approval use that in the future. https://forums.gta5-mods.com/topic/14021/mod-approval-thread/836

@djdmaze Yes, its a glitch on the forums, from time to time you will be logged onto someone else's account... including moderators or admins and you can do whatever you want until you log out, its a big security issue which as of right now hasn't been fixed as you see