(SAVE BEFORE MISSION)
What I recommend doing is save before you do the mission the 1st time, if you do the mission then die, get busted, fail, etc. you will not be able to get the achievement. I found this out the hard way. I had to restart a lot..
It doesn’t matter if the car sparks a couple times. as long as you don’t break off any peices or make it spark a ton you’ll be fine. Make sure to arm the bomb before you park. If you arm the bomb then get back in the car the car will explode. Best of luck!