2006 focus 1.6 Ti-VCT hesitation
Discussion
Hi
I have noticed a small problem, on the motorway at moderate speeds and very light throttle openings (50-75mph) i can feel a hesitation/hiccups from the engine. like a small misfire. the car has only 34K on the clock.. before i looks at the plugs/leads/coil, is this a common problem?
cheers
I have noticed a small problem, on the motorway at moderate speeds and very light throttle openings (50-75mph) i can feel a hesitation/hiccups from the engine. like a small misfire. the car has only 34K on the clock.. before i looks at the plugs/leads/coil, is this a common problem?
cheers
Just sent you an email - I've started seeing the same thing at high load, around 4,000rpm. Not seeing any fault codes nor EML at this time.
I suspect this is down to ignition so I will start looking at plugs and leads, then consider the coil - but if anyone has any advice I'll be very glad to hear it.
I suspect this is down to ignition so I will start looking at plugs and leads, then consider the coil - but if anyone has any advice I'll be very glad to hear it.
Unfortunately not - I'm aware of the issue you are talking about, but this already has the later washerjet/seal and is nice and dry around the plug wells.
Stripped plugs/leads/coil out over the weekend and no obvious causes, though did note that the plug gap is getting away from the 1mm spec. Did manage to provoke a constant cylinder 4 misfire when refitting, though cured with some jiggling, so perhaps the leads are wearing out after ~95K! (Haven't really questioned it before, but it does seem odd they are completely omitted from the service schedule)
Might treat it to some new parts and monitor for changes.
Stripped plugs/leads/coil out over the weekend and no obvious causes, though did note that the plug gap is getting away from the 1mm spec. Did manage to provoke a constant cylinder 4 misfire when refitting, though cured with some jiggling, so perhaps the leads are wearing out after ~95K! (Haven't really questioned it before, but it does seem odd they are completely omitted from the service schedule)
Might treat it to some new parts and monitor for changes.
Hello!
Sorry for the late reply, only just checked my email!
My car started with the hesitation at 42K. it has for some reason disappeared, but do get the odd one every so often (now at 61K). I'm planning to replace the plugs, leads and ignition coil in the next couple of weeks.
No water anywhere near plug holes either.
I have another strange problem, in the that the temp gauge drops with fast motorway driving to just above 60c..
any ideas?
I do like my little focus. It was going to be a stop gap to something better, but now i've decided to keep it because i enjoy the drive. I'll keep you informed of the bits and bobs and update my profile of the costs.
NST
Sorry for the late reply, only just checked my email!
My car started with the hesitation at 42K. it has for some reason disappeared, but do get the odd one every so often (now at 61K). I'm planning to replace the plugs, leads and ignition coil in the next couple of weeks.
No water anywhere near plug holes either.
I have another strange problem, in the that the temp gauge drops with fast motorway driving to just above 60c..
any ideas?
I do like my little focus. It was going to be a stop gap to something better, but now i've decided to keep it because i enjoy the drive. I'll keep you informed of the bits and bobs and update my profile of the costs.
NST
Thanks for looking in - I'd advise you to check the ignition components carefully and perhaps not splash out if they all look to be in good order and not otherwise due for replacement.
I replaced the lot (Bosch coil only £30 from eBay and the plugs/leads would have been done in another few thousand miles anyhow) but the following day the hesitation was the worst I've had, and eventually it dropped into limp home mode. This cleared on a restart, but had recorded fault code P2135 to the ECU which is a discrepancy between the A and B readings from the throttle position sensor.
I did have warranty work done on it several years ago to cure an erratic idle and I recall the relevant Ford-TSB mandated a replacement/amended TPS and wiring loom. Believe this was put down to corrosion/interference with original connectors of poor quality.
Since the ECU code came up I've dismantled and cleaned throttle body, TPS, intake & MAF and been generous with the electrical contact cleaner at the sensor wiring pins - but have yet to start tracing cables back to the PCM. It ran without any apparent problems this morning, but not confident I've cured it yet.
EDIT: Not had issues with temperature, but would suggest monitoring the sensor outputs if you have or can borrow an OBDII reader for your laptop or phone. Suspect the thermostat may be stuck open and so overcooling in the high speed airflow, but worth ruling out a problem with the display gauges before breaking out the spanners. The gauge is heavily damped, I believe it should read dead centre when within range, so the 60c displayed may not indicate true 60c coolant temp, even if the gauge is fine.
I replaced the lot (Bosch coil only £30 from eBay and the plugs/leads would have been done in another few thousand miles anyhow) but the following day the hesitation was the worst I've had, and eventually it dropped into limp home mode. This cleared on a restart, but had recorded fault code P2135 to the ECU which is a discrepancy between the A and B readings from the throttle position sensor.
I did have warranty work done on it several years ago to cure an erratic idle and I recall the relevant Ford-TSB mandated a replacement/amended TPS and wiring loom. Believe this was put down to corrosion/interference with original connectors of poor quality.
Since the ECU code came up I've dismantled and cleaned throttle body, TPS, intake & MAF and been generous with the electrical contact cleaner at the sensor wiring pins - but have yet to start tracing cables back to the PCM. It ran without any apparent problems this morning, but not confident I've cured it yet.
EDIT: Not had issues with temperature, but would suggest monitoring the sensor outputs if you have or can borrow an OBDII reader for your laptop or phone. Suspect the thermostat may be stuck open and so overcooling in the high speed airflow, but worth ruling out a problem with the display gauges before breaking out the spanners. The gauge is heavily damped, I believe it should read dead centre when within range, so the 60c displayed may not indicate true 60c coolant temp, even if the gauge is fine.
Edited by simion_levi on Monday 14th May 17:25
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