C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

Injectors

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Old Jun 28, 2008 | 01:44 PM
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Default Injectors

I installed a set of 30 pound an hour injectors the I had 3 bad injectors so this is why I replaced them. The problem is it is running worse than before. It is idleing real high and when you take off from a stop it misses real bad and has about a 2 or 3 second flat spot. Any suggestions.
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Old Jun 28, 2008 | 01:50 PM
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Did you reprogram for the larger injectors? If not, that is your problem.
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Old Jun 28, 2008 | 02:00 PM
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too big an injector for the car, what came out of? 22lb or 24lb?
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Old Jun 28, 2008 | 02:04 PM
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Originally Posted by vettaim
I installed a set of 30 pound an hour injectors the I had 3 bad injectors so this is why I replaced them. The problem is it is running worse than before. It is idleing real high and when you take off from a stop it misses real bad and has about a 2 or 3 second flat spot. Any suggestions.
i looked at your profile. Why did you put 30lb injectors in that engine. First of all if you put the red top bosch in they are 32lbs in your car because they were rated at ford pressure not gm. your engine only needs 22lbs. so basically if you did not reprogram the ecu, you are putting in 80LBs of fuel per hour more.
32lb injectors will handle up to 410 of real CHP..

Last edited by FICINJECTORS; Jun 28, 2008 at 09:41 PM.
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Old Jun 28, 2008 | 02:09 PM
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You should get some of the Bosch III's from FIC since you now need new injectors anyway. I just ordered some for my LT4 and can't wait!
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Old Jun 28, 2008 | 02:12 PM
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Originally Posted by shop14
too big an injector for the car, what came out of? 22lb or 24lb?

Sounds like way to much for a basically stock engine (I read your profile)---You may be able to get around it by changing injector pulse width with a new tune/reprogram---but I feel you would be better off with a stock type injector.
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Old Jun 28, 2008 | 02:38 PM
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Originally Posted by StealthLT4
You should get some of the Bosch III's from FIC since you now need new injectors anyway. I just ordered some for my LT4 and can't wait!
justin check your mail they were deliverd to your address at 10:28 today.. let me know..
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Old Jun 28, 2008 | 04:25 PM
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Originally Posted by vettaim
I installed a set of 30 pound an hour injectors the I had 3 bad injectors so this is why I replaced them. The problem is it is running worse than before. It is idleing real high and when you take off from a stop it misses real bad and has about a 2 or 3 second flat spot. Any suggestions.
WAAAAAY too much injector. Use no bigger than 24 lb.
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Old Jun 28, 2008 | 05:14 PM
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Originally Posted by FICINJECTORS
justin check your mail they were deliverd to your address at 10:28 today.. let me know..
Thanks! I live on a military base so I can't pick up on Saturday, but I'm looking forward to Monday morning!
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