car dies at WOT
Thread Starter
Teching In
Joined: Oct 2007
Posts: 9
Likes: 0
From: texas
car dies at WOT i have a 98 z28 and it has been cutting out and dying when i get in it all the way @ around 62-6500 rpm. put the car in neutral and it fires right back up with no problems also runs fine as long as i dont get in the gas pedal. anyone have any suggestions thanks.
Staging Lane
Joined: May 2007
Posts: 95
Likes: 2
What mods have you done? Sounds like you might be running lean.
Staging Lane
Joined: May 2007
Posts: 95
Likes: 2
What injectors are you running (and what duty cycle % are you running them at?) what size cam, how much estimated horsepower?
If I had to take a guess, I'd say it could possibly be dirty injectors or a dying fuel pump or clogged fuel system. But I am just completely guessing.
But we need alot more details to really be any help.
Thread Starter
Teching In
Joined: Oct 2007
Posts: 9
Likes: 0
From: texas
im not real mechanic savvy but when i get home this evening ill give you all the specs i have on the car it put up in a file at the house. the horsepower dyno was 385 done when they tuned the car at texas speed that was about 3 years ago and it just recently started acting up a few weeks ago. it runs fine as long as i stay out of the gas
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Staging Lane
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Staging Lane
Joined: May 2007
Posts: 95
Likes: 2
But yeah I guess it is safer to just replace it now regardless.
Last edited by Ironembraced; Oct 22, 2011 at 10:42 PM.
Staging Lane
Joined: May 2007
Posts: 95
Likes: 2
if you're gonna go the shotgun route, i'd do a fuel filter b4 i did a fuel pump. a dirty filter may very well manifest itself like this, and its the cheapest thing you can do. i'd probably pull a plug or two if you can do it right after it happens. the plugs can tell all...
Fuel system pressure test is the best thing to do. These pumps go out all of the time. Rent or buy a fuel pressure gauge and hook it up to the rails and see what you've got during start-up, idle, throttle and how it "leaks down" once the motor is off...
I'm not saying blindly replace the fuel pump, obviously a fuel pressure test is in order but sure sounds like it.