1.9 Boost Sensor and EGR Valve clean

[djr69uk]

Today I took off boost sensor and EGR valve to clean them, as I've noticed a bit of hesitation about 1.8-2k revs sometimes. I am running a tuning box, but this hasn't caused any probs in about 15k of running. I've taken off EGR valve 10k ago so it wasn't too bad... but the main problem I noticed was that where the EGR connects to the manifold, it was all coked up there on the manifold side, almost completely blocked - this is after I cleaned it last time. So this time I had a good poke about with a small screwdriver and sprayed some carb cleaner in there too. Loads of crud came out - and I mean loads.

Then when I took off the boost valve I noticed this was completely enclosed in crap. So sat that in a cap of carb cleaner for an hour, then sprayed it directly with the carb cleaner and it started to look like a boost valve after a while lol!

Popped the lot back together and she started first time - thankfully - was a little worried about my excessive use of carb clearner lol! Anyway, noticed immediately that the throttle response had improved - this is very apparent. Then took it out for a blast and everything felt spot on. Pulls a bit harder again but power delivery seems smoother and the idle is spot on. I know people can clean car parts and then the placebo effect kicks in - but this was a definite improvement. No hesitation now at 2k either.

I'm wondering how safe it would be to spray loads of carb cleaner into the manifold where the EGR joins... I know there is a ton of crap in there. Anyone done this without any probs?

[chris1804]

thats one thing i wanna do on my vectra the egr, its done 45k now and the last owner had it from new and he was 65 so i dont think he would of done it lol, you know the coolant hoses how did you stop them from leaking? thats the only thing stopping me from doing mine unless i change the coolant at the same time,

[Stuarty]

Theres no issues that i am aware of regarding cooling hoses mate just have to move 1 hose out the way a bit to get to one of the bolts it dosent need to be disconected.

[hertscol]

No coolant gets affected.

I agree the torque curve on the acceleration is so much smoother now.

I carb cleanered my inlet manifold entrance too, and when it started up poor with spanners and eml lights on when driving, I was worried. However as I have detailed over this site, It was the solenoid pin drill, tap remove and grease problem... Now all is well

[chris1804]

sorry mines a dti so its got to be different to yours in the how 2 its states

You will see 2 pipes leading into the valve,these are coolant pipes and need to be removed.
Use a pair of pliers to compress the clips and slide them off,place a rag underneath the pipes as there will be a small amount of coollant that will drain from them.
The pipes are very easy to remove..BUT have something ready to plug the ends with..i used 2 10mm bolts which i just quickly screwed into the ends,this stopped the pipes draining.

[djr69uk]

No coolant gets affected.

I agree the torque curve on the acceleration is so much smoother now.

I carb cleanered my inlet manifold entrance too, and when it started up poor with spanners and eml lights on when driving, I was worried. However as I have detailed over this site, It was the solenoid pin drill, tap remove and grease problem... Now all is well

reckon it would be ok to spray liberally inside the manifold? what are thoughts on this?

[LEW1S2006]

After i cleaned mine i noticed the car runs at a higher temp than before!

[Daniel89]

After i cleaned mine i noticed the car runs at a higher temp than before!

i noticed the same thing is that a good thing or bad :O!

[Daniel89]

reckon it would be ok to spray liberally inside the manifold? what are thoughts on this?

i sprayed directly inside rubbed it all down works a lot better no EML so should be fine

(reply is very late but for future reference)