Is there a knock sensor?

WISH30

MEMBER
1999 MERCURY COUGAR
2.0L
4 CYL
2WD
MANUAL
250,000 MILES

Dears, as I told you in some of my previous questions the car is very unprofessionally modified, and components are joined like salad.

When I look buy OEM number for some parts it gives Mondeo mk1, for some mk2, for some Focus.

The engine, as the person who sold me this scrap told me, is from Mondeo (probably mk2).
It is Zetec 1.8 RKB petrol.

Does it have a knock sensor and where should I try to find it and test it?
Asking theoretically first, because practically there are lot of unreachable points, and it is not smart to remove all the parts just for inspecting location of sensor. As I told in my previous question it has monopoint LPG mounted with huge resonator over the throttle intake and it covers lot of stuffs but is risky to unmount because there was some leaking on the joint of throttle body, then I solved with some rubber rings.
Thanks

7 Replies

KEN L

MASTER CERTIFIED MECHANIC
48,289 POSTS

There is a knock sensor which is on the right side of the engine. These are difficult to test so I would just replace it if you have the codes for it? What kind of problem are you having?

Was this

answer

helpful?

Yes

Saturday, October 29th, 2022 AT 11:47 AM

WISH30

MEMBER
120 POSTS

What right side? When you are in front of the car or inside the car? Top or bottom, near some better known part. Do you have some diagram or similar? I have tons of problems, but this is just one of the points that I can try haha. The compression of the engine is low, about 7 bar per cylinder, it also consumes lot of oil, for example about 1 liter per 1500 km, but it works and goes haha.
The point that led me to inspect this sensor was that when you run the engine cold it knocks like lot of hammers bumps, in first minute or two, and then it works fine. But when you drive lower speed and higher shift, for example shift 3, speed 30 km/ph and try to accelerate, the same sound is heard pretty loudly, like metal-to-metal knocks. Mechanics said that is hydraulic lifters, but I think it would not be a mistake to inspect more around this sensor, especially if take the fact that the engine is replaced (pretty unprofessionally) also a lpg unit is mounted and lot of other unprofessional things.