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

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Old Mar 18, 2009 | 05:10 PM
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Last night after coming home from work, I parked the corvette in its usual spot in the driveway. This morning I walked outside to start it, it started, ran for 3 seconds, then died. I think to myself okay ill just restart it. It cranked and started for a second and died. Tried again, and got the same thing. Checked for codes, got a code 33 for mass airflow sensor. Disconnected battery, disconnected and reconnected maf sensor and reconnected battery. No codes this time. Started the car and again ran for a second and died. Lately the car has been acting up with its idle, so I came onto the forums and searched for IAC valve. Flew to autodump in my trusty Buick (paid half as much for that as for the vette and its been serving me well without any problems lol) and bought a new IAC valve and throttle body gasket. I get home, start removing the throttle body, get it off, and start removing the IAC valve. It wouldn't move, and I put some power to the wrench and IT SNAPS OFF IN THE ****ING THROTTLE BODY. Now I have the threads of the valve stuck in the TB, and the rest of the motor is in the trash can.

What do I do?



sorry bad quality

Last edited by Pwnage1337; Mar 18, 2009 at 05:44 PM.
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Old Mar 18, 2009 | 05:38 PM
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If there is some metal sticking out, use a screw drive and tap it. I've turned out broken things that way several times. You may have to cut a slot or something so there is a place to tap on. First put and let soak in, some penetrating oil.
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Old Mar 18, 2009 | 05:54 PM
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If that doesn’t work you should be able to cut it with a small saw lenght wise, then collapse the casing by bending it with some vice grips, and turn it out. Be careful not to damage the threads.
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Old Mar 18, 2009 | 07:39 PM
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Thanks for the help, hopefully I can get it back on the road soon.
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Old Mar 18, 2009 | 08:22 PM
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How did you determine the IAC is bad????
There are tons of reasons for a bad idle, just ask me. I have been chasing mine down for a long time.

Spray PB blaster or something like that in the threads, bend a piece that is sticking out down and use a hammer(lightly) and a flat head and tap it till it loosens up.

Starting and dying like that is a sign of a really clogged filter or a bad pump.
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Old Mar 18, 2009 | 09:11 PM
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The fuel filter was replaced about 1500 miles ago, and my last fuel pressure check was a week ago and it came out @ 39. I could check it though.
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Old Mar 19, 2009 | 10:35 AM
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When my FP died, it would idle for a couple of seconds, once even for 2 minutes and then die. If you run your car low on gas, you will kill a FP pretty quick. I try never to run below 1/4 of a tank.

Not to chastise, but diagnose 1st. Then buy parts, will save you lots of time and money.
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