Honda civic 1.7 ctdi limp mode fixed !!! - Civinfo
 
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post #1 of 11 (permalink) Old 19th August 2014, 14:20 Thread Starter
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Smile Honda civic 1.7 ctdi limp mode fixed !!!

Hi everyone Iím new to this site. I'm a proud owner of a Honda civic ep4 thatís the 2 door 1.7ctdi s.e

Like many 1.7ctdi owners i have also suffered from the dreaded limp home mode issue under load. I've searched high and low for a fix without having to change a variety of sensors, egr valve and turbo etc etc. no boost leaks etc etc

I have managed to resolve the issue for good and it cost me less than a fiver !!! Honestly not joking about here.

So the issue presents itself whilst trying to accelerate and hitting limp mode around the 50/60mph range on a slight incline or even no incline at times. Revs would be limited to around 2500 and so would speed and power. switching the engine off for 30 seconds or so would reset the system until the next time. So everyone who's suffering with this issue read on and Iíll show you how to fix it yourself for less than a fiver.

Cause of the problem
The problem consists of the variable vanes and actuator on the turbo becoming sticky and clogged as well as a combination of carbon build up in the egr valve.

Don't laugh as I have done this and it's worked 1000% and no more limp mode for the past 8k and counting. I found this fix on the Brisk Skoda tdi site and adapted it for my civic ctdi 2005 s.e

Items / tools needed to fix the issue
1, A can of Mr muscle oven cleaner (the foaming one) i got this from asda £2.99
2, 1.5 metres of clear pipe i got this from b&q £0.98 per metre
3, Socket set
4, screwdrivers
5, patience
6, Mole grips

Before attempting this please ensure your car is cold as the manifold can get extremely hot and burn you !!!

What to do
> Remove engine cover
> Remove egr valve and connecting pipes
> Spray egr valve in oven cleaner and leave aside
> remove pipes which connect to the exhaust side of the manifold / turbo (the hot side) these are at the front of the engine bay and will be covered in superficial rust. ( you might need a little heat to open these )
> remove spray nozzle from Mr muscle oven cleaner and attach clear pipe over it
> feed the clear tube down in to the turbo side as far as it will go
> Push down on the pipe side attached to the Mr muscle can and watch the foam fill the tube, carry on until the foam does not pour out of the metal manifold pipe the plastic tube has been inserted in to.
> from underneath the car locate the turbo and move the actuator, this should move a few cm max either way. If its stiff or won't move try a mole grip. The actuator should have smooth movement hard but smooth and should not feel gritty.
> keep playing with the actuator every 10 mins or so over a two hour period.
> Clean egr valve out using screwdrivers as the Mr muscle oven cleaner will have softened the carbon build up.
> Once two hours have passed connect everything back up in reverse order
> start the car and drive gently until the engine warms up to operating temperature.
> Now the fun bit slam it in second and red line it and then in third and red line it
> then slow down and slam in second and red line and third and red line you need to do this for a few miles.
> You may notice a little smoke from the exhaust and a chemically smell which is the residue of the Mr muscle burning out of the exhaust. The car may hit limp mode a few times whilst doing this. Keep resetting the system by switching the engine off
> once a few miles have passed thatís it. stop turn engine off, restart and jump on the motorway and hey presto no more limp mode. You will also feel more torque in the lower range and your car will feel more lively and i noticed an increase of 5/6 mpg now currently returning 65mpg as per the trip computer on-board. Iíve never had it so high !!!

I did this trick over 8k ago and itís never missed a beat since. No more limo mode!!!

Thanks and enjoy
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post #2 of 11 (permalink) Old 19th August 2014, 14:31 Thread Starter
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post #3 of 11 (permalink) Old 19th August 2014, 16:46
Bye bye Honda...
 
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Welcome to Civinfo!

Personally, I think I'd want to be absolutely sure that I had a turbo problem before filling it up with Mr Muscle. What diagnostic trouble code was being registered in the ECU when the car was going into limp mode under load?

But well done for fixing the problem with your car so successfully for very little cost!
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post #4 of 11 (permalink) Old 19th August 2014, 16:49
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Well done mate was only talking about this in another thread recently and how the VAG boys sorted it, it's a known fix and works very well, good old Mr Muscle.

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post #5 of 11 (permalink) Old 19th August 2014, 19:49 Thread Starter
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My civic was not registering any codes on the ecu and no eml light either. I took the car to various mechanics who all pointed towards replacing the turbo
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post #6 of 11 (permalink) Old 19th August 2014, 19:50 Thread Starter
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A friend of mine had the same issue on a diesel golf registering boost pressure to high he did the same mr muscle trick and hey presto all fixed
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post #7 of 11 (permalink) Old 19th August 2014, 19:50
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Loves the jobs you hate
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post #8 of 11 (permalink) Old 19th August 2014, 21:02
Bye bye Honda...
 
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Quote:
Originally Posted by ep4yow View Post
My civic was not registering any codes on the ecu and no eml light either. I took the car to various mechanics who all pointed towards replacing the turbo
Fair enough. Apologies if I seemed negative, but it's a brave thing to do without being absolutely certain that it's a boost issue.
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post #9 of 11 (permalink) Old 19th January 2018, 07:09
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Would this work on a 2.2 CTDi as well?

How much would it cost to pay someone to do this? As I donít have tools and I wouldnít know where to start...
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post #10 of 11 (permalink) Old 25th February 2018, 21:02
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iam going to try this when weather improves
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post #11 of 11 (permalink) Old 25th February 2018, 22:35
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you can buy a kit from cox with all the gaskets and a tin of cleaning spray to clean egr on 2.2
a word of warning be very care full if using mr muscle oven cleaner read the warnings on it
this stuff is banned from many workplaces as its very hazordous and toxic
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