12-16-2009, 10:35 AM
yeah it definitely has a regular return and regular looking FPR with its own vacuum control....
good ideas, but maybe this helps. The hoses are cracked, the large hose wasn't even connected to the intake, and the car runs fine. "fine" being hesitating a little when cold, I would assume due to the extra air being pulled in past the MAF, hence running lean, but once it gets into closed loop, it runs perfect. Now if it's a little down on power or something, I wouldn't know, but I'm pretty temped to just remove this squid of hoses if it's some minor, emissions related thing.
So yeah, if they were squirting fuel into the intake, I'd have fuel everywhere, and if the injectors needed it to function... well... they aren't getting it. :dunno:
Good questions. The system is tapped into the large boot that connects the TB to the MAF. And you may be on to something when you put vacuum hoses in quotes, because it's not vacuum line type thin little hoses, the small ones are fuel line size and the big one that taps off the boot (#17) is maybe an inch in diameter. It would seem to me that the boot area between the filter and TB would be slightly less than atmospheric pressure = vacuum, but I'd love to be educated on that if I'm wrong. I just don't see how it could be positive unless it's boosted.... well, I guess unless you're going pretty fast and have a "ram air" system.... :dunno:
Dave Wrote:-Injectors squirting tiny amounts of fuel into the intake
-Injector needs some kind of vacuum for functionality (whats the point of EFI?)
good ideas, but maybe this helps. The hoses are cracked, the large hose wasn't even connected to the intake, and the car runs fine. "fine" being hesitating a little when cold, I would assume due to the extra air being pulled in past the MAF, hence running lean, but once it gets into closed loop, it runs perfect. Now if it's a little down on power or something, I wouldn't know, but I'm pretty temped to just remove this squid of hoses if it's some minor, emissions related thing.
So yeah, if they were squirting fuel into the intake, I'd have fuel everywhere, and if the injectors needed it to function... well... they aren't getting it. :dunno:
Steve85 Wrote:Before or after the throttle body? I know the title is "vacuum hoses" but it never hurts to ask the explicit questions to figure this stuff out. On 99% of cars I have seen the TB is connected directly to the manifold and the intake tubes (from filter to TB) are therefore generally positive pressure areas.
Good questions. The system is tapped into the large boot that connects the TB to the MAF. And you may be on to something when you put vacuum hoses in quotes, because it's not vacuum line type thin little hoses, the small ones are fuel line size and the big one that taps off the boot (#17) is maybe an inch in diameter. It would seem to me that the boot area between the filter and TB would be slightly less than atmospheric pressure = vacuum, but I'd love to be educated on that if I'm wrong. I just don't see how it could be positive unless it's boosted.... well, I guess unless you're going pretty fast and have a "ram air" system.... :dunno:
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