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That is the system cutting back on boost, possibly because it is sensing knock. Could it be the DI? Possibly, but not likely. A bad DI will show up as missing, not as slightly reduced boost.
My guess - the engine was starting to knock. Yes, a small vaccum leak could cause it. And as Julian notes, some slightly less than ideal fuel. What octane were you running? What do you usually run? Was it a bit warmer than usual?
I'd also pull the plugs. Check for gap, and see how they look - do they look a nice grey, or the white of running lean? Try topping off the tank with some premium, and see if the problem goes away - if so, it truly is/was knock.
posted by 76.204.146...
Posts in this Thread:
- '94 Aero boosting wierdness...., Garret, Sat, 15 Sep 2007 22:33:20
- It was the gas! issue solved, thanks! n/m, Garret, Thu, 20 Sep 2007 19:00:30
- Re: '94 Aero boosting wierdness...., Ari
, Sun, 16 Sep 2007 18:54:36 <-- Viewing This Message - bad gas?, Julian Santa-Rita, Sun, 16 Sep 2007 09:02:06
- Oh, and I forgot to mention..., Garret, Sat, 15 Sep 2007 22:34:51
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