Not getting air?
Safety Car
Joined: Sep 2001
Posts: 4,164
Likes: 555
From: Glenbeulah Wi
The car won’t start at WOT but I’ve attached a video. In the video the injectors are sitting just up from the seats. The car starts and sucks the injectors back in and the engine and kills the engine. It won’t start no matter what with the injectors in unless you create a massive vacuum leak like removing the iac valve. And yes I’ve replaced the iac valve.
Team Owner
Joined: Aug 2004
Posts: 21,543
Likes: 3,216
From: Park City Utah
Since "holding the injectors up" isn't a diagnostic process that any of us are familiar with, if it were MY car, I'd put them in, put the MAF on and try to start it....then I'd go about investigating why it won't start;
Pull plugs; are they flooded? dry?
Shoot a little ether while cranking...does that help?
Are the injectors even firing when you drop them in? Is there a harness issue that you're "fixing" by pulling up on the injectors? (A bad connection?)
I "get it" why you're doing what you're doing, but you've proven the point, and learned a thing...so now stick the injectors back in and see why it won't start. The fuel going into the engine should be proportional to the air going in, regardless of what that amount is; this isn't a carburetor where you can "choke it" and make it too rich....the MAP and ECM should ensure that. So if there is a "lack of air", -not enough to idle the engine, opening the throttle is an instant and easy fix. If it still won't start, you need to find out why. Is it too rich/flooded? Or is it too lean/starving? Which is it?
Pull plugs; are they flooded? dry?
Shoot a little ether while cranking...does that help?
Are the injectors even firing when you drop them in? Is there a harness issue that you're "fixing" by pulling up on the injectors? (A bad connection?)
I "get it" why you're doing what you're doing, but you've proven the point, and learned a thing...so now stick the injectors back in and see why it won't start. The fuel going into the engine should be proportional to the air going in, regardless of what that amount is; this isn't a carburetor where you can "choke it" and make it too rich....the MAP and ECM should ensure that. So if there is a "lack of air", -not enough to idle the engine, opening the throttle is an instant and easy fix. If it still won't start, you need to find out why. Is it too rich/flooded? Or is it too lean/starving? Which is it?
