Problems after installing induction kit

[Sythan]

Hey guys, I recently installed an Oversized Ramair Induction kit since I`ve been reading about them being decent budget kits and a lot of people here and on the mk5 gti forum have got one.However I ran into a problem after installing it.
Its seems that the engine revs when idle going from about 800rpm to 1400 then dropping back, and again and again. Also when starting from cold it revs up to about 3000 then drops to 800. I didnt have these issues with the stock filter box and intake.
Is it possible that I am leaking air from somewhere? Or is it something else. I`ve been searching for a while and people usually dont have any problems with the kit.
I`ve got a stage 1 tune,and a catback exhaust but I`ve had no issues with that. There are also no fault codes.
Any help will be appreciated.

 

[Legojon]

Did you plug the MAF sensor back in?

 

[Sythan]

Did you plug the MAF sensor back in?

Yep in the tube that comes with the kit

 

[Brimfull]

Having a remap then adding an induction kit can cause issues with the cars breathing.

I had this issue on remapped vectra vxr, I took the car back to the tuners who tweaked the map to basically factor in the induction kit.

I am not saying this is defo your issue as alot people add bits of kit after a remap and have no issues, it all depends on the map and how sensitive the tune is.

Certainly something to have a look at. Have you tried to put the stock air filter back to see if the issues goes away?

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[Sythan]

Having a remap then adding an induction kit can cause issues with the cars breathing.

I had this issue on remapped vectra vxr, I took the car back to the tuners who tweaked the map to basically factor in the induction kit.

I am not saying this is defo your issue as alot people add bits of kit after a remap and have no issues, it all depends on the map and how sensitive the tune is.

Certainly something to have a look at. Have you tried to put the stock air filter back to see if the issues goes away?

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Well yeah I figured it might be the ECU trying to compensate for the additional airflow, since I was planing to get a intercooler in a couple of months and then going for a stage 2+ with the intake already in.

Well switching back to the stock filter is my next step to checking if it fixes the issue.

 

[Rickyr65sl]

What are you using to Plug it in and check for any fault codes? Some code readers will only show a fault if the EML is on and others will show a fault that’s present but hasn’t brought EML on yet...

Also try running it with the MAF unplugged and see if there’s any change.

I’ve never had issues like you describe from fitting an intake on a tfsi regardless of the car already being mapped or not.

If the MAF itself isn’t the problem then I’d assume it’s sucking in air from somewhere after the MAF, have a look at the coupling between the intake and turbo, make sure it’s fitted correctly and that there’s no splits/holes in it.

If everything comes back fine then the only other thing I can think of it being is a faulty PCV and it’s just pure coincidence that it failed at the same time you fitted the intake.

Also maybe worth disconnecting the battery for 30mins or so and letting the ECU soft reset so all the sensors etc can re-learn if you no what I mean... most of the time it doesn’t rectify anything but worth a go with it being free.

 

[Sythan]

What are you using to Plug it in and check for any fault codes? Some code readers will only show a fault if the EML is on and others will show a fault that’s present but hasn’t brought EML on yet...

Also try running it with the MAF unplugged and see if there’s any change.

I’ve never had issues like you describe from fitting an intake on a tfsi regardless of the car already being mapped or not.

If the MAF itself isn’t the problem then I’d assume it’s sucking in air from somewhere after the MAF, have a look at the coupling between the intake and turbo, make sure it’s fitted correctly and that there’s no splits/holes in it.

If everything comes back fine then the only other thing I can think of it being is a faulty PCV and it’s just pure coincidence that it failed at the same time you fitted the intake.

Also maybe worth disconnecting the battery for 30mins or so and letting the ECU soft reset so all the sensors etc can re-learn if you no what I mean... most of the time it doesn’t rectify anything but worth a go with it being free.

I`ve disconnected the MAF and it seems to fix the issue the revs go back like they should.But now I get a check engine light because of it. The car runs as it should with it unplugged.
Can have a go with the battery since I`ve seen a couple of suggestions about that as well, but the ECU should have already learned by now.

 

[Sythan]

Update
So apparently I was leaking air around the turbo. I took everything off and reassembled it all back. Probably didn't tighten everything like I should have. So far runs smooth and revs are at 750ish in neutral not jumping like before.

 

[Brimfull]

Update
So apparently I was leaking air around the turbo. I took everything off and reassembled it all back. Probably didn't tighten everything like I should have. So far runs smooth and revs are at 750ish in neutral not jumping like before.

Glad you got it sorted and at no cost which is always a bonus

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[ash_89]

I had the same problem with ram air oversized kit for my k1 , the pipe going to the top of turbos diameter is too large so it kept sliding off over time .
revs would hang also the became un responsive pulling away .
Glad you sorted the problem mate !