88 corvette , flooding problem
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Intermediate
Joined: Jul 2011
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From: River dr park ONT
88 corvette , flooding problem
My 88 floods out .. Can be 5 seconds , sometimes a few minutes. Been running fine till now . Came home from a 180 Km highway drive and shut the car off when I got home.. A hour later went to start and No start , smell of fuel. Nothing visual to see. Left it , but next day started ,but flooded out after a couple of minutes. Leave it long enough or remove plugs to let it dry out and it will restart , just not for long,, Floods out again. Any thoughts??
Thread Starter
Intermediate
Joined: Jul 2011
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From: River dr park ONT
Racer
Joined: Oct 2011
Posts: 312
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From: state of insanity
i had the same problem,was the injectors not shutting down and bleeding through. replaced the injectors,ran fantastic,better then before,guess the old injectors were dirty and needed cleaned or replaced anyway.
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Racer
Joined: Oct 2011
Posts: 312
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From: state of insanity
i should have explained more . it wasn't all injectors itwas one. idecided one goes bad others will,so i replaced them all at one time rather then having the same problem 7 more times and getting stranded 7 more times for the same thing. if all leaked through at once i would have more then likley hydraliced the motor now i have a bent rod or 2.not saying thats your problem but that was mine. when i had the problem i talked to several mechanics and they concured. and the way one put it,if its not going through the injector how else could it get there. cured my woes.
Racer
Joined: Nov 2006
Posts: 420
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From: Sierra Madre California
Just had the same problem with my '88 a couple of weeks ago. If you just pull the throttle body you can quickly ascertain if there is any gas in the plenum. If there is, it's the fuel pressure regulator. There is no other way that raw gas can get up to the plenum. $70.00 for a new diaphram at AutoZone and an easy afternoon or evening.
Thread Starter
Intermediate
Joined: Jul 2011
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From: River dr park ONT
Thanks you guys .. Looks like pressure regulator.. Can,t get the part till Fri or Mon.. Let you know how it comes out.. This is a great forum ,,, Lots of help , Pretty new at Corvettes ,, Finding out this a different bread than what I,m use to,,, But love it ,,
Pro
Joined: Dec 2010
Posts: 704
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From: Shillington PA
Temporary bandaid to get it running. (and I know not everyone will agree with doing this...but.....) Before cranking, put the gas peddle to the floor, and hold it. That will stop the injectors from opening during cranking, and the car should fire from the fuel already flooding it.... lol, ask me how I know.....
PS, once it fires, lift your foot from the peddle, so it does not over rev....
PS, once it fires, lift your foot from the peddle, so it does not over rev....
Thread Starter
Intermediate
Joined: Jul 2011
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From: River dr park ONT
iF IT SAT FOR A DAY IT WOULD START, BUT FLOOD OUT QUICKLY.There would be so much fuel in the cylinders after flooding , I was thinking more of engine damage if it did happen to start ,, But now after 3 oil changes and the new computer , its like new again..
Safety Car
Joined: Apr 2011
Posts: 3,660
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If I were you, I'd pay close attention to how it performs for the next few weeks until I called it "fixed". ECMs don;t just fail. What normally happens is a short or cross-over signal in the inj circuit that grounds the injectors. These are BANK_FIRED meaning that when one fores they ALL fire. This also means that when one shorts...they ALL short.
This can be shorting wide open and allowing residual fuel to bleed into the cylinder and from there into the crankcase.
You may have accidentally moved the right/wrong wire and corrected the shorting issue. Because the inj is operated just as everything else is, by completing the ground path thru the ECM...a short is a simple way to make a nice ECM look bad....
To satisfy the question, I'd plug in the old ECM and see if the problem started immediately. If it does, then yeah, good catch. Most folks would have gone thru hundreds of $$ before making that discovery, BUT< experience tells me that the short has better odds of being the actual culprit.
