Butterfly Flap and EGR

[Quirrel]

I cleaned my intake intake flap thing at the weekend, it wasn't too bad and is possibly off a scrapper from the paint marks on it.

I noticed the butterfly flap is held on my two screws to the bit that moves it.

Has anybody tried running their cars without the butterfly in place? I get this p1237 low boost pressure, and supposedly the IMRC has fixed it, but it's still there. I know on my Saab and on BMW it is possible to remove these flaps if wanted. I know it would remove the flap being stuck if it was causing my low boost pressure.

Can it be done on the Honda engine.

Additonally the EGR valve has four torx screws on the top of it. What happens if I separate it at this point? Does it give access to cleaning it or does it knack it up?

 

[CJM]

I cleaned my intake intake flap thing at the weekend, it wasn't too bad and is possibly off a scrapper from the paint marks on it.

I noticed the butterfly flap is held on my two screws to the bit that moves it.

Has anybody tried running their cars without the butterfly in place? I get this p1237 low boost pressure, and supposedly the IMRC has fixed it, but it's still there. I know on my Saab and on BMW it is possible to remove these flaps if wanted. I know it would remove the flap being stuck if it was causing my low boost pressure.

Can it be done on the Honda engine.

Additonally the EGR valve has four torx screws on the top of it. What happens if I separate it at this point? Does it give access to cleaning it or does it knack it up?

As in a previous post you have mentioned that the IMRC solenoid replacement has improved the drive-ability of the car significantly, which personally I would say that is proof enough that the IMRC valve is now operating correctly.

The purpose of the IMRC is more for running at lower revs. Personally I wouldn't remove the flap, even to clean it.

Have you ruled out the boost control solenoid which is towards the rear of the engine on the right-hand side and checked for Vac leaks ?

I cannot really comment on the EGR cleaning of the pre-facelift, I know there are plenty of reconditioned ones being sold on Ebay etc though. However the EGR on the pre-facelift is electronically controlled rather than vacuum controlled and if you have an issue with the EGR then it could of course be within the electronics rather than mechanical.

 

[joooe]

I cleaned my intake intake flap thing at the weekend, it wasn't too bad and is possibly off a scrapper from the paint marks on it.

I noticed the butterfly flap is held on my two screws to the bit that moves it.

Has anybody tried running their cars without the butterfly in place? I get this p1237 low boost pressure, and supposedly the IMRC has fixed it, but it's still there. I know on my Saab and on BMW it is possible to remove these flaps if wanted. I know it would remove the flap being stuck if it was causing my low boost pressure.

Can it be done on the Honda engine.

Additonally the EGR valve has four torx screws on the top of it. What happens if I separate it at this point? Does it give access to cleaning it or does it knack it up?

You shouldn't remove the 4 torx screws on the EGR. They don't give access for you to clean it. The solution is to remove it from the engine altogether (you'll have to remove the air filter box).

About the butterfly, you can easily see if it's stuck. Just move it yourself, with the engine off, and see if it moves freely. If you already cleaned it, you know how to make it move manually. Or do what I did, and place your phone securely in the engine bay, and record a video while you accelerate the car (at idle, and stopped, of course) to see it opening and closing (at idle it's closed, when you accelerate it opens accordingly). When the engine is off, it returns to the open position.

About the p1237 DTC, take a look here: http://typeaccord.co.uk/forum/topic/3571-dtc-p1237/

 

[Quirrel]

It's goign back to the Honda specialist tomorrow evening. He will check the turbo actuator and exhaust side of the turbo for me to see if they are stuck and coked up.

I will mention the boost control solenoid. I noticed it the other day, it is the one with the white filter coming off it, isn't it.

What is the part number for it?

The garage said the EGR is spotless and had obviously been put on recently. Looks like someone else has had a go at the faults and not fixed them.

Makes me wonder if this ECU/ECM fault could be genuine.

Fuel filter has been replaced by me last week.


Reading around the finger is currently pointed at the turbo actuator, and worst case scenario the ECM.

If I get an ECU from ebay is it locked to the car and would it need an immobilizer defeat on it?

I'm still convinced it's something simple, got to keep the positive viewpoint up, for now anyway.

 

[F6HAD]

David, it will actually be something simple - it nearly always is. And I include the turbo itself in that... they're not that expensive anymore and you can pick decent used ones up for a few hundred quid these days. If the EGR has been done, then I also agree either sticking vanes in the VNT or the actuator itself.