| Share | Phrase |
|---|
| 29.21% | pre-ignition sub-system |
| 9.81% | pre-ignition detonation |
| 6.36% | pre-ignition likelihood |
| 6.27% | pre-ignition tester |
| 5.82% | auto pre-ignition |
| 5.65% | resistant to pre-ignition |
| 4.64% | pre-ignition chamber |
| 4.47% | pre-ignition [does] occur |
| 3.95% | cause pre-ignition [perform operation] |
| 3.66% | detect pre-ignition [perform operation] |
| 3.43% | prevent pre-ignition [perform operation] |
| 3.17% | pre-ignition zone |
| 3.13% | pre-ignition problem |
| 3.10% | lead to pre-ignition |
| 2.76% | even [degree] pre-ignition |
| 2.05% | avoid pre-ignition [perform operation] |
| 1.32% | engine pre-ignition |
| 1.10% | pre-ignition circuit |