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

92 Hiccup

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Old Aug 22, 2011 | 09:05 PM
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Default 92 Hiccup

I recently changed my fuel injectors (FIC) and the car is running 99% smoother. But I still have a slight hiccup. When I get on it, it hesitates then a little sputter. This is about 30 min. of highway driving. At a traffic light stopped it doesn't really run rough.. well maybe a little.(like when your heart skips a beat).
Fresh tank of gas (Shell).
Any suggestions. Do new injectors have to break in?

Never Forget
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Old Aug 22, 2011 | 10:31 PM
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Few Suggestions;
Last time plug or wires were changed?

Clean throttle body and mass air flow.

Check for smoothness of voltage off wiper of TPS.
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Old Aug 23, 2011 | 10:31 PM
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Originally Posted by pcolt94
Few Suggestions;
Last time plug or wires were changed?

Clean throttle body and mass air flow.

Check for smoothness of voltage off wiper of TPS.
Plugs changed 2 years ago. never wires

can you explain smoothness of voltage off wiper of TPS?
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Old Aug 24, 2011 | 03:11 PM
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Check for vaccum line leaks. I think there is a "T" on the passenger side fuel rail under the cover. check both sides as the low side toward engine can get hole in it and also brake booster vaccum hose and the booster itself for any cracks just in case.
I think thats the culprit to many low/rough idle issues
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Old Aug 24, 2011 | 03:13 PM
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could be opti too. I just changed mine water pump leaking. I was getting an intermittant sys light before changing. clean and check the TPIS and throttle body.
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