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diddles
HI, I've recently brought a 1.8 duratec mk2 Ford focus with 46,000 miles on an 07 plate.

I love the car but just a few things which I want to sort out.

At low revs when accelerating there is what sounds like a slight pinking noise from the engine, is these quite common, the air filter and spark plugs are new.

Also when driving there is a faint knocking from the drivers side front when going over uneven roads. Top mounts?

When starting car from cold the belt is making a squeaking noise untill the car has warmed up. Are these stretch belts fitted on these? And is the tensioner common to get noisy?

Thanks for the help!
jeebowhite

Hi Martin,

 

the pinking noise could be due to a slight misfire, the spark plugs may be new, but did you replace the HT leads also? the coil pack may be on its way out, but replace the HT Leads first.

 

The knocking noise could be the top mount, but it could also by the CV joint.

 

As for the squeak, the tensioners have been known to go, it would be worth having these replaced if the issue persists, but it sounds like at least the bearings are on their way out.

diddles
It doesn't have leads just has four coil packs. Doesn't feel like it's misfiring, unless it's the tensioner making a noise similar to pinking. Are the belts stretch fit ?
jeebowhite

I believe they are none stretch, but cant swear to it, but unless I am missing something, you still need a way to get the high voltage spark from the coil pack to the spark plugs, so you should have some for of lead gong from the coil pack out to the spark plugs?

diddles
Thanks I will fit a belt first as a squirt of wd40 made it go away. The lead looks like it's built onto the coil pack.
jeebowhite

have you got a photo?

 

I am not overly familiar with the engine you are referring to but perhaps someone else could clarify where I may be going wrong!

diddles
http://www.sbdev.co.uk/Duratec/Electrical%20components.htm
It's the picture on the left.
jeebowhite

OK so, it sounds like there is something wrong somewhere on the wiring harness, I bet its related to the sensors (one or multiple). I expect that the relay and ecu connector are not getting all of the appropriate values, and so the engine just uses default values rather than accurate realtime ones. I wonder if its misreading, or not putting the right amount of fuel in for the actual amount of air that there is in the system, thus causing the knocking. It could be a bad lead, bad connector, bad sensor, its difficult to say.

 

How new are these sparkies, and if they are all built into this system, where they all replaced together, as it looks like one loom, one unit?

 

Did you replace just the coil plug in units?

diddles
Yeah sounds possible, but I'm not 100% sure it's actually pinking or just something that sounds similar, maybe the tensioner it's not thatbad and only intermittently. There are no faults might give the o2 sensors a clean and the maf sensor if it has one.
jeebowhite

definately worth a try, and check if it has any error codes if you can (where are you in Kent? - I might be able to help with reading the codes if you need it?)

diddles
Thanks for the offer, I have read the faults with my torque app on my phone and on the cluster and showing no faults. I'm in west Wickham. Trying to find locations of components on this engine is a nightmare!
jeebowhite

not sure where that is, lol as I am a northern boy at heart, I know my way around most of medway, and down to ashford, anywhere else is beyond me lol.

 

The Torque app only queries the instrument cluster and the general repository for error codes. I have an airbag light on, have had the Cruise control disconnect itself once or twice, along with an immobiliser error (chip in key broke!) Torque didnt pick them up, but I have a modified ELM cable and FORSCAN on my laptop which I used to scan all the modules on the car and that gave me all the errors. It gave me a lot more info!

 

Torque is good, it accesses a lot of live data but it is generic along with the bluetooth, whereas tools like ELM and FORSCAN are more designed for the Ford, Mazda and similar ranges, so knows which modules to ask which question, rather than asking generally what errors might be in the central repository!

diddles

I downloaded a Torque add on to monitor detonations, and its coming up with possible detonations. I know its not accurate but its probably is pinking then, might put in new plugs or clean the coil packs out and I don't think I noticed it before replacing the spark plugs. I fitted the correct iridum NGK spark plugs.

diddles
Does anyone know what the gap should be on the ngk ITR6F-13 (4477) as I want to remove them and check the gaps are correct. Thanks
Also does anyone know what make of plug does ford use?
jeebowhite

book  says 1.3 I believe but its the 1mm gap that makes it work correctly as far as I know....

diddles
Thanks, I will check them tomorrow. I took off the coils and sprayed the leads with electrical cleaner and it seems better. It's not that bad but don't really want it to do it.
jeebowhite
Good contact are key but it's worth checking the gap

Sent from my MY SAGA C2 using Ford OC mobile app
diddles

I checked the gap on the plugs and they are all fine.

 

I was just checking the short term fuel trims on Torque Pro app and they seem to be fine when cruising, but when i floor it the fuel trim goes to around 10-15% which indicates running lean, also when driving full throttle the throttle position never reads above 76%. Shouldn't it goes to 100% or is it cutting how open the throttle is because of the lack of fuel? I not sure how accurate this app reads the sensors as the car drives fine.

 

Also noticed when flat out in 2nd gear the throttle position goes to 75% then at about 4,500rpm it goes down to 45% but seems to accelerate well.

 

Not sure if i trust the readings i am getting.

diddles
My engine light has come on now and its coming up with PO138. I cleaned the o2 sensor connections last night with electrical cleaner so I'm guessing this has something to do with it. Checked o2 sensor voltage on torque app they stay at 1.3 volts and not fluctuating like they should. What have I done?
diddles

 have fault codes PO138, PO132 and P1132? 

jeebowhite
Not at a pc now otherwise would check all the codes but Google 'Ford etc (code number) and you will get some more info. Sounds like the 02 sensor might not been reinstalled correctly or if it's not connected right it might be just getting a short out reading

Sent from my MY SAGA C2 using Ford OC mobile app
diddles
The connections seem fine, going to check continuity between the wires.
diddles
Checked continuity between the wires and they all seem fine, I'm at a loss now don't know what could have happened!
diddles
It says on the torque app, system in open loop due to systems failure, anyone have any ideas, I think the sensors are ok and the wiring seems ok. I've disconnected the battery and still no good, could I have damaged the ecu some how?
jeebowhite

Po138 -
The Heated Oxygen Sensor (2) located rear of catalytic converter produces an output signal relative to oxygen storage capacity of catalytic converter.


Ho2S 2 signal is less active than signal produced by front oxygen sensor. This code sets when HO2 Sensor voltage is greater than 999 mV for more than 2 minutes (time depends on model. Could be as high as 4 minutes)
 

P0132 - This involves the front oxygen sensor on Bank 1. This code indicates that the heated oxygen sensor reading is too high. In the case of Ford vehicles, that indicates the voltage at the sensor is over 1.5 volts. Other vehicles may be similar.

 

P1132 Ford - Lack of Upstream Heated Oxygen Sensor Switch Bank 1 - A Heated Exhaust Oxygen (HO2S) sensor indicating rich at the end of a test is trying to correct for an over-lean condition. The test fails when the fuel control system no longer detects switching for a calibrated amount of time.

- Leaking fuel injector bank 1
- EGR stuck open
- Engine mechanical condition

 

Hopefully this helps!

The Heated Oxygen
Sensor (2) located rear of catalytic converter produces an output signal
relative to oxygen storage capacity of catalytic converter.

Ho2S 2 signal is less active than signal produced by front oxygen
sensor. This code sets when HO2 Sensor voltage is greater than 999 mV
for more than 2 minutes (time depends on model. Could be as high as 4
minutes)

Read more at: http://www.obd-codes.com/p0138
Copyright © OBD-Codes.com
Ho2S 2 signal is less active than signal produced by front oxygen sensor. This code sets when HO2 Sensor voltage is greater than 999 mV for more than 2 minutes (time depends on model. Could be as high as 4 minutes)

Read more at: http://www.obd-codes.com/p0138
Copyright © OBD-Codes.com
 
diddles
Thanks, I've been racking my brain all day to what is causing this. I don't think the sensors are at fault. Its got to be something to do with the wiring since it was fine before I cleaned them with electrical cleaner but I don't know what. I don't want to replace both sensors for the fault to stay.
jeebowhite

the issue may not be with the one you cleaned, as unless you did the exhaust side, you may find it is just that one sensor?

diddles
I didn't remove the sensors from the exhaust just cleaned the electrical connections. So just unplugged the plug connectors and cleaned them, then refitted them. Dont know why it's now coming up with both o2 sensor faults.
jeebowhite

could be that its not really making a good connection, best bet is to try and clean the sensor heads themselves.

diddles
Yeah might have to try that, as a Ford o2 sensor Is £199! These Ford parts aren't cheap. Wish I never touched them now, but I dont know how disconnecting a plug and plugging it back on could causes this unless its coincidence that one sensor has gone down. It's really bugging me now!
jeebowhite

short of breaking an already bad connection theres little than can be done.

 

I think the broken wire probably already existed to be honest, you just brought it to light.

diddles
Yeah, maybe the sensor was on its last legs anyway and moving it around just finished it off. Think the best thing to do is try a new upstream sensor and see what happens. I can buy a NTK one for £79 so might try that.
jeebowhite

still check things like continuity, resistance etc and see if there can be any improvement.

diddles
I've checked as much as I can and everything seems normal. My brother has a mk1 focus 1.8 and I think the o2 sensor uses the same connector. So probably going to try that on my one and see what happens.
jeebowhite

fingers crossed it works out as a simple error!

diddles
Thanks, I hope so. Will update Wednesday when I try my brothers sensor.
fourspeed
I drive mk2 focus 1.8 duratec and have been experienced with pinking noise and i do a carbon clean to the engine and the pinking is gone. Hope it'll help.


Sent from my iPhone using Ford OC
diddles
I replaced both o2 sensors and the fault codes have gone now. The electrical cleaner must have shorted out the sensors.
Andy.B1971

Knocking on uneven roads could be drop links VERY common problem :D :driving:



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