Flooding problem
Thread Starter
Safety Car
Joined: Dec 2007
Posts: 3,616
Likes: 5
From: Sandhills of North Carolina
Flooding problem
1996 LT1
see sig for mods
The car just started this recently. When I first crank for the day sometimes it fires and then quits. Sometimes it keeps running and runs fine. If it does quit then when I go to start it again it floods and then sometimes it will fire up and run but today it isn't running. I can disconnect the fuel pump and it will finally fire and run the gas out of the fuel rails and then of course stop. I hook the FP back up and it will not fire back up for anything. I've tried three different fuel regulators and it makes no difference. I have 30lb FMS injectors on the car. Is it possible they are to much for the stock heads? Is there an adjustment for the injectors in the tune that may be off?
see sig for mods
The car just started this recently. When I first crank for the day sometimes it fires and then quits. Sometimes it keeps running and runs fine. If it does quit then when I go to start it again it floods and then sometimes it will fire up and run but today it isn't running. I can disconnect the fuel pump and it will finally fire and run the gas out of the fuel rails and then of course stop. I hook the FP back up and it will not fire back up for anything. I've tried three different fuel regulators and it makes no difference. I have 30lb FMS injectors on the car. Is it possible they are to much for the stock heads? Is there an adjustment for the injectors in the tune that may be off?
Pro
Joined: Oct 2009
Posts: 679
Likes: 0
From: vero beach florida
30# seems excessive, as stock 24's will take you to 400.
Did you check the ohm's on the injectors and put a noid on them?
Did you check fuel pressure while cranking?
Did you change the pump to match the new injectors?
Did you check the ohm's on the injectors and put a noid on them?
Did you check fuel pressure while cranking?
Did you change the pump to match the new injectors?
Melting Slicks
Joined: Dec 2009
Posts: 2,241
Likes: 290
Do you have a fuel pressure gauge hooked up? What's it reading when running, & does it hold pressure when the engine is off. You may have to check the resistence of the coolant temp senser(it changes w/ temp). 30lbs. injectors sounds big to me, I think when you choose injectors you gotta be honest about your build. Just don't go by what the tech guy said, double check at other sources like here.
Thread Starter
Safety Car
Joined: Dec 2007
Posts: 3,616
Likes: 5
From: Sandhills of North Carolina
I didn't test fuel pressure but I can. I figured it had plenty since it was flooding and with three different regulators I didn't thin it could be excessive. I can check it though in a few.
The fuel pump is a new Racetronix Walbro.
I have a noid light and can check that also.
Thread Starter
Safety Car
Joined: Dec 2007
Posts: 3,616
Likes: 5
From: Sandhills of North Carolina
Do you have a fuel pressure gauge hooked up? What's it reading when running, & does it hold pressure when the engine is off. You may have to check the resistence of the coolant temp senser(it changes w/ temp). 30lbs. injectors sounds big to me, I think when you choose injectors you gotta be honest about your build. Just don't go by what the tech guy said, double check at other sources like here.
The injectors were doing fine until all of this started not long ago. It was my tunes recommendation to move up from the 24's I had on the car.
Is it possible that the spark just isn't hot enough? The plugs are NGKTR55IX gaped at .050
Melting Slicks
Joined: Jun 2002
Posts: 2,705
Likes: 30
From: Chesapeake Beach Maryland
2015 C5 of Year Finalist
Mike - are you still using the factory heads unported with factory valves?
I have the same 30# FMS injectors with no problems thus far over the past couple years. Lots of people told me they were too much, but Lloyd told me to use them and not worry. I guess it could be a function of the factory heads but not sure.
I just wanted to let you know I'm using the same injector as you and have had good results but with the LE2 heads.
I have the same 30# FMS injectors with no problems thus far over the past couple years. Lots of people told me they were too much, but Lloyd told me to use them and not worry. I guess it could be a function of the factory heads but not sure.
I just wanted to let you know I'm using the same injector as you and have had good results but with the LE2 heads.
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
Every 2027 Corvette Engine Explained
Joe Kucinski
Designer Imagines A Corvette That Looks More Like a Corvette Than the Corvette
Verdad Gallardo
10 Ugly Corvettes That We Still Kinda Love
Joe Kucinski
Top 10 Most Expensive Corvettes Ever Sold on Bring A Trailer
Brett Foote
10 Things Every Corvette Owner Needs (2026 Edition)
Michael S. Palmer
8 Most "Only Corvette Owners Understand" Quirks and Problems
Pouria Savadkouei
10 Reasons the C6 Z06 is Still A Performance Benchmark After 20 Years
Joe Kucinski
How Much Horsepower Every Corvette Engine "LOST" in 1972
Joe Kucinski
Top 10 DOs and DON'Ts for Protecting Your Convertible Top!
Michael S. Palmer
Thread Starter
Safety Car
Joined: Dec 2007
Posts: 3,616
Likes: 5
From: Sandhills of North Carolina
Mike - are you still using the factory heads unported with factory valves?
I have the same 30# FMS injectors with no problems thus far over the past couple years. Lots of people told me they were too much, but Lloyd told me to use them and not worry. I guess it could be a function of the factory heads but not sure.
I just wanted to let you know I'm using the same injector as you and have had good results but with the LE2 heads.
I have the same 30# FMS injectors with no problems thus far over the past couple years. Lots of people told me they were too much, but Lloyd told me to use them and not worry. I guess it could be a function of the factory heads but not sure.
I just wanted to let you know I'm using the same injector as you and have had good results but with the LE2 heads.
On another note I put a Noid light on it and all the injectors are pulsing. Fuel pressure is about 40 running.
Now I have another problem. I can get it to run but it seems to be running on about half the cylinders and the temp gets up really fast. That might explain why it's flooding so bad this time. Looks like it might be opti time again.
Thread Starter
Safety Car
Joined: Dec 2007
Posts: 3,616
Likes: 5
From: Sandhills of North Carolina
Pro
Joined: Oct 2009
Posts: 679
Likes: 0
From: vero beach florida
Check spark at all 8 cylinders
AFPR will work on OBDII cars.
OHM the injectors.
Getting hot quick is a sign of a bad running engine.
Did it ever run good w/30# injectors?
Did this problem just happen or was it after you did something?
AFPR will work on OBDII cars.
OHM the injectors.
Getting hot quick is a sign of a bad running engine.
Did it ever run good w/30# injectors?
Did this problem just happen or was it after you did something?
