BigRed

Alright. this situation has been touched on a few times recently, but I've been able to study it a little further. With this new info I'd like to get your information

Perf. Mods:

DP, CB, PowerFC

I was having an odd boost transtion. I would get boost pattern of 10-5-5>>creeping to 10 during a boost test. This was happening constantly with no deviation.

I swung by my mechanics place to have him take the car out for a spin and try to duplicate the problem. before we headed out, he adjusted the duty cycle (65% primary and 65% secondary) and we could not reproduce the odd transition.

later that night a friend of mine got his datalogit and we hooked it up to my PFC to test it out. Worked great. while we weren't recording, I was able to reproduce the same boost pattern, but not as freqently.

over the next week and a half I've been able to note the following:

1) exaust note change : when this transition problem occurs, there is a specific change in the exaust tone. The exaust gets louder, but less crisp.

2)4000 rpm flooring the gas: this transition problem most commonly occurs in 3rd or 4th when mashing the pedal after cruising.

3)I can correct the problem: If I feather the accelerator, or downshift and then accelerate I can usually get back to normal boost levels.

I'm hoping these descriptions are enough to have someone point me in the right direction.

Thanks

Bigred

j9fd3s

iTrader: (3)

did it bolw that hose off the vacuum tank again?

mike

BigRed

nope.. that's not it mikey. I wish

JONSKI

I'm deeply tempted to go non-seq to fix my 10-5-7 pattern.

BigRed

It happens alot less often now that my mech. changed the duty cycle. what/where does this control and is there a posibility of that getting stuck or breaking?