GolfGTIforum.co.uk
Model specific boards => Golf mk4 => Topic started by: Jordan_gti on 25 April 2017, 20:43
-
Hi guya, my 1.8t is being a nightmare again, it struggles to start, when it drives there is no boost (Boost gauge read vacuum but no boost at all) even if you really rev it theres no boost, ive changed pipes near inlet manifold incase of leaks, I did notice one of the pipes going into the rocker was badly split, but this has been sealed temporarily so I can see if that was it, it was not. Ive just scanned it with vag com and am getting 2 codes, P1602 / 18010 & P0102 / 16486. Somewhere else on VCDS lite I remember seeing Secondary air injection "failed or incomplete"? if this helps, many many many thanks in advance
-
Unplug your maf and see how it goes as one of the codes point to that :smiley:
-
Hi, thanks for the reply, I tried unplugging the MAF and it still runs the same, So i checked the plug that goes into the maf, I noted my Actual maf has 5 pins but my plug only has for pins and one little green blanking plug where the 1st wire would be?
-
Using vagcom while car is running, check the engine section and go to measuring blocks I cannot remember which block you read but if you cycle them you will notice that you will eventually get to one that will show the mass airflow reading, this will confirm that your MAF is working so you can rule that out.
Your first error code is related to the battery being disconnected at some point, your second error code is your MAF, i would recommend that you buy some electronic contact cleaner and use that to clean up your MAF, or even see if you have a friend that has the same engine that you could maybe borrow their MAF to test on your car.
Do you by any chance have an induction kit? If its a K&N that has the cone coated in cleaning oil these are known for killing MAFs.
I would hazzard a guess that you have a boost leak, check every single boost pipe, vac hose especially the turbo inlet pipe from the MAF going down to the turbo, check all the little vac lines under the inlet manifold and the pancake pipe connecting to your side mount intercooler.
Failing that worse case it could be the turbo :(
-
HI, thanks for the detailed reply, I appreciate it :) I used to have a cone filter from an s2000 which ive removed and put back on a few times, which is how I discovered I split the rocker breather pipe. At the moment I have the standard air box with a k&n panel filter. I have some cleaner I will try to clean MAF later, I have Friday off work so im going to have a boost leak test done and hopefully will be able to rule out a boost leak or fix any existing
-
Keep us posted :)
-
UPDATE, SO I complete disassembled the MAF & Cleaned, this didn't remedy it. I did however read somewhere online that the MAP sensor (on inter-cooler) So I ran the car with this unplugged, the car will now create around 3PSI Boost, It used to create about 5-6 (standard amount), Is this all down to a faulty MAP sensor? I would of thought it could boost to full standard level (5-6 PSI)
-
Map unplugged would send into limp mode eventually as it cant read the boost
-
ive checked every pipe possible for leaks including pancake pipe, the only thing that got a response from the car was the old map sensor, ive order a new one & hoping it sorts it, if not i dont know where to go
-
****FIXED**** :) IT WAS THE MAP SENSOR