[Author Prev][Author Next][Thread Prev][Thread Next][Author Index][Thread Index]
Re: 5kCSQ Overboost problem
> Scott Mockery and I (mostly Scott) did a thorough check of all the engine
> systems on the 5kcstqw I purchased this week. When we measured the duty
> cycle, it was about 52%, removing the oil dip stick raised this up to ~ 65%,
> but the engine did not stall. Ned and others said that the dip stick test
> was a good way to check for leaks. I think your duty cycle of 50-55 is
Thats degrees not %. It's too lean for my liking - especially since
the computer will set it to 60% for 'enrichment'. I won't be getting
any enrichment when it's needed. I'm going to go buy yet another
adjuustment tool. I keep losing these things.
> fine. From what you said, it sounds like you have isolated the problem to
> the wastegate frequency valve. I seems like the computer is routing more
> pressure to the top of the wastegate allowing you to get more boost and thus
> overboost. How much boost are you getting?
I've seen 1.6 on the dash meter, 10psi on a guage plumbed in at the computer.
I went thru those hoses again today. They aren't blocked. The solenoid
isn't leaking. The hoses are connected correctly.
Only one thing - the port on the wastegate won't hold pressure or vacuum...
perhaps I have a problem with the wastegate.