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Turbo problems

S

Sanchez

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Location
Leeds / Selby
Car
2005 accord tourer
Folks, I'm looking for some advice on an issue I've had as a result of a new turbo. My original post is below;
http://typeaccord.co.uk/forum/topic/13554-hello-there/

As a recap, my turbo blew in December and ever since acceleration has been very poor, with the turbo only kicking in at around 2.5k revs. I recently took my car to my mechanic to look at this again, but still he cannot fin anything wrong with the turbo. He said he's played around with the boost, checked all connections and it all looks good. He's only parting comment was to look at getting the re-mapped which could solve the problem. I'm not against doing this and would like the extra horses and mpg but don't want to do this if there's something else at fault. Plus there is no guarantee this will solve the issue. Thoughts?

Once the turbo kicks in it like being in a rocket and before you know it I'm doing a million miles per hour and ready for mars. Before that there is hardly any pull and you really have to think about the drive and being in the right gear.

I'm no mechanic but it shouldn't be like that. The Fuel filter was replaced Jan 2012 with an original part. Could there be some sort of boost leak?

Should I have the car put on some diagnostics in case there is anything wrong? F6HAD, you mentioned getting the car over to you to check?

I just don't know where to go next and I'm starting to feel quite deflated as its not the driving experience I expected. And now that i'm having to look at other avenues to get the car sorted, is there any garages that anyone would recommend for me to have a look? I'm in Leeds but not originally from the area, so could do with some recommendations.

I look forward to some expert replies and and hopefully a solution to this problem.

Sanchez
 
Hi Michael, bring it over this weekend, let's run some tests.

Tuning a car with problems is only likely to give you more problems, so that's not the answer. Give me a call tomorrow to arrange.
 
Why not take it to Honda? Better that than wasting money on things it may be and garages that can't help!
 
***uming that the car has been taken for Fahad to have a look at, I'm sure there'll be some feedback on the actual problem very soon. Fahad does have a Honda Diagnostic System and is very experienced with the i-CTDi engine... because of this I would suggest he is at least equal in diagnostic ability to any Honda garage.
 
Thanks for the vote of confidence there ;)

Yes I saw Mike earlier this morning. Injector calibration is out quite a bit which would indicate a problem there but it also failed the boost continuity test.

Egr test was fine.

So my money is on the turbo actuator or possibly a boost leak somewhere. The turbo itself could also be faulty but he was told it was a brand new unit. I also removed and cleaned the MAP sensor as it was covered in oil rather than the usual gunk but it made no difference.

I've told him to go back to the guy that fitted the unit and ask him to check over his work. After all the car was fine before the turbo blew and that's the only part that was replaced so logic dictates its an issue there. Also the the car will have chucked oil everywhere so its worth cleaning out the pipes, intercooler and inlet manifold for good measure.
 
Yeah thanks F6HAD for today. Really impressed with the kit and what you could do. Thanks once again for seeing the car at short notice. at least I now know that there is still something wrong as opposed to that's the way it is.

will be on the phone in the morning to get the car back in to be looked at, have the intake and inter cooler cleaned and checked for boost leak / actuator problems. May also get the oil replaced to make sure its 0/30.

Thing is, I think I've realised that maybe my mechanic has some limitations so do I go back and maybe hope for the best or take it elsewhere........

I'll let you all know how I get on.
 
Hi Mike,

Great to meet you.

I think you should give him the opportunity to resolve it. If he doesn't cooperate then drop me a line and as long as you can make the trek to Bradford, I'll have some of my trusted guys take a look at it. Don't worry, I'm sure we can solve it.
 
F6HAD said:
Hi Mike,

Great to meet you.

I think you should give him the opportunity to resolve it. If he doesn't cooperate then drop me a line and as long as you can make the trek to Bradford, I'll have some of my trusted guys take a look at it. Don't worry, I'm sure we can solve it.
Click to expand...
hi
how did this problem resolve itself as i have the identical problem.The car drives fine under normal road conditions but you have to think about what gear to be in to get over the 2500 rpm for the turbo to kick in then as you say it takes of like a rocket.I am about to start stripping things to bits but i'm waiting to see what happened with yours
 
So Mike's car is at my friends garage where it has been for over a week. Nothing obvious seemed to be wrong and it really was a head scratcher... until he removed the turbo which had been fitted by the original technican.

Upon removal you can see soot blowby around the edges, and evidently the fitter had failed to seal the unit correctly so there was no gasket!

Now we can't be 100% sure, but we are quite confident this is the issue causing the poor performance. Essentially the turbo is failing to build pressure as it's not sealed properly..

Gasket kit is on back order at Honda Bradford, so he's expecting it in tomorrow and will fit it this week. Fingers crossed this resolves it and we can solve another mystery!

Just goes to show you can't simply trust mechanics to do even the basics correctly.
 
So then people, its been a little while since I posted an update on the whole issue.......

Fahad got me in touch with a mechanic to look at the issues stated in this post and investigations looked as though the turbo gaskets were missing. These were put on the car but the turbo still didn't work properly.

The turbo was "new" but upon further inspection it looks as though its a re-con. So a used turbo was sourced and put on to see if that fixed the problem.

It has, the turbo kicks in sooner amd the power doesn't come on in one go anymore. Thing is, its still not working how it was in my opinion. So I managed to get the car to fahad for more tests and the good news is that the diagnostic machine could test the turbo unlike last time. However, its still out of range.

This time when the secondhand turbo was fitted, all pipes, vents, exhaust and intakes were cleaned. So there really is nothing else the guy could have done. This is so frustrating......

Not sure where to go now. Have got a new map sensor on order to see if that helps. Otherwise its a dodgy accord. Not what I would have thought from a Honda.

I can't afford to take it to Honda. I've already spent over 2k trying to fix this and now I've got to try and get money back from my first mechanic on the not so new and knackered turbo that was fitted originally.

So my next port of call is you type accord experts.... Any help or advice?
 
Yes - Mike has a spare and we swapped them over. The original from his car works better than the replacement..

I have to say this one is really screwing with my head. I also test drove the car, and it's still flat - although much better with the turbo we sourced from a breaker for him.. I think he could have a dodgy MAP sensor but won't know until he tries it..
 
F6HAD said:
Yes - Mike has a spare and we swapped them over. The original from his car works better than the replacement..

I have to say this one is really screwing with my head. I also test drove the car, and it's still flat - although much better with the turbo we sourced from a breaker for him.. I think he could have a dodgy MAP sensor but won't know until he tries it..
Click to expand...
FAhad mike keep us posted as I had a good think over it all day today...but it seems like you guys have covered most things :s
 
I hope my turbo issue isn't gonna be as much of a mind f--- as this. :|
 
Are the accord boost pressure valves / solenoid which are controlled by the ecu closed circuit or open???..if they are closed then they rely on the info sent to the ecu by the manifold pressure sensor which could be at fault creating the lag? Only thing is the problem sounds like a manual boost control problem were the spring rate is tighter, the more boost that is needed to move the ball, and allow the boost pressure to reach the wastegate actuator.(hence the sudden feeling of the car taking off) feel stumped with this at the moment.
 
All has been done pretty much. New map sensor will hopefully be delivered tomorrow.

You state the spring rate could be tighter? How can this be tested?
 
You're thinking of mechanical turbo's sufian, these cars have a variable vane turbo so there is no wastegate. The ECU is requesting a specific volume of boost which the vanes on the turbo create.
 
Ahh ok ... so is there anyway the vanes can be tested to see if they operating correctly ie.. narrowing of vanes at low engine rpm creating boost... if vanes are not as narrow as they should be at low speed /load then the exhaust gases will not be creating enough pressure between the vanes and the turbine wheel.. hence loss of boost pressure at low rpm...it sounds as though the vanes are stuck in a slightly more open position than they should be at low rpm... if the vanes were fully closed you would be over boosting all the time... but lets see with the new map sensor...fingerss crossed
 
I've put the new map sensor on, driven all wkend and its made a difference. Car runs a lot better. Still not 100% but better. Going to replace the maf soon to see if that makes a difference.

Seem to be getting somewhere with this at last.
 
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