HELP boost spikes boost cuts and CEL

[MOtown A4]

like the title says, threw a CEL and was messing with it a little and noticed this morning it was only allowing it to boost 5 PSI. now this afternoon on my way home it was spiking 15-16 and going back down to 13-11. any ideas?

[MOtown A4]

no one?

[pipe7284]

probably your N75 is going bad.

[MOtown A4]

probably your N75 is going bad.

well i was messing around with that general area under the hood on friday, do you think its just a bad connection?

this same thing seems to happen every time i get on it real good and then it disappears a day or so later.

[pipe7284]

Try to disconnect it from all the sides and make sure there is no debri on it, make sure all the hoses are free of dirt. clean up a bit the connector and put everything back together.

[B5A4Kevin]

check for boost leaks with a pressure tester. if you have a boost/vacuum gauge, are you reading lower vacuum? i just recently fixed a boost/vacuum leak that i had. it was causing 10" Hg instead of 20 and 10psi spike and 7psi held rather than 13 spike and 10 held (stock programming). a semi loose or cracked hose may cause a leak one day, but on another day be sealed enough to achieve full boost a few times. if it seems like more of an electrical issue, run vag on it and check/log blocks 115 as well as 3 and 32.