Knock sensor

CALVIN RAY HARIS

MEMBER
2006 FORD FREESTAR
3.9L
V6
2WD
AUTOMATIC
180,000 MILES

Running and driving good, got A/C charged. It started acting like it had no oil, pining, running bad, and started losing and running bad like air, fuel, timing off. Thanks

Friday, September 14th, 2018 AT 12:43 PM

3 Replies

ASEMASTER6371

MECHANIC
52,797 POSTS

Good evening.

Is the check engine light on? If it is, do you know the code?

Possible issue:

1. Fuel pressure.

2. Timing off.

3. EGR valve not working.

4. Catalytic converter clogged not allowing the engine to breathe.

Roy

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Friday, September 14th, 2018 AT 7:06 PM

CALVIN RAY HARIS

MEMBER
2 POSTS

I would like to know where the knock sensor or sensors are located.

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Tuesday, September 18th, 2018 AT 1:56 PM

ASEMASTER6371

MECHANIC
52,797 POSTS

Procedure and location below:

Roy

Removal and Installation
1. Disconnect the battery ground cable.
2. Remove the air cleaner outlet pipe.
3. Remove the front and rear roll restrictor bolts and the roll restrictor.
- To install, tighten to 63 Nm (46 lb-ft).

4. Remove the upper and lower roll restrictor bolts and the roll restrictor bracket.
- To install, tighten to 90 Nm (66 lb-ft).

5. Disconnect the knock sensor (KS) electrical connector.
6. Remove the nut and the KS.
- To install, tighten to 20 Nm (15 lb-ft).

7. To install, reverse the removal procedure.

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