I'm looking for some advice on possible culprits for a poor running mk2 16v kjet, it starts fine and on with very light throttle revs okay up to 6k, and feels like it's going to take off but when I put my foot down the acceleration is worse than light throttle The fuel pump primes and I'm fairly sure the lift pump is working okay, the vacuum hose to the computer is sucking, it starts first time and have changed plugs\leads so think the spark is okay It makes an odd\off sound when I go past half throttle also the revs drop quite slowly and today when I revved it to 2.5k it just went down to 2k and didn't go any lower until I turned off the ignition My replacement exhaust manifold for my cracked one had been welded and seems to be leaking aswell, I know this won't help but would it totally ruin the power?
hello there, have you had a read of this? https://clubgti.com/forums/index.ph...air-and-tune-your-mk2-corrado-1-8-16v.195423/
I did have a look a while ago, I've had another look through, one off my vacuum hoses that comes out the right hand side of the engine bay isn't connected up where should this go to? I think it's for the mfa, also how do I test the sensors on the side of the head? I don't have the tools to test the fuel pressure/timing and CO so I'm not sure how much further I can go myself
the mfa hose goes to one of the nipples on the brake servo vacuum hose with the sensors if you dont have a multimeter you can try the trick in my guide where you swap the dashboard yellow/red wire between all 3 sensors then see if the dashboard reads the same for them all. the timing light you need shouldn't cost too much as it only needs to be a basic type without internal advance dial, just go for an inductive type as it makes your life much easier. I wouldn't bother with CO testers as the diy ones are a bit hit and miss, just pop down local garage and have it checked once you're sure everything is 100%. Theres a method in my guide for tuning by ear you can follow also
Do you mean the nipple to the right hand side of the T piece that's attached from the computer/overrun? Mine has the vacuum hose attached from beside the brake servo, if so where should that one be going to? Also is it 3 or 5mmm hose? I've gone and bought 3 but it's not going on easily at all. Thanks
On the main chunky hose from the inlet to the servo theres a non-return valve which originally had 2 small vacuum nipples. your MFA pipe goes to one and the rest of the engine vacuum lines to the other. If one of the nipples has snapped off you can T into the other nipple if need be. its 3.5mm ID for the vacuum lines, unless the hose is extremely rigid you should be able to use 3mm easily heres an awesome MS paint vacuum diagram
