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

Gassey smell upon first start-up, why?

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Old May 15, 2002 | 12:27 PM
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Default Gassey smell upon first start-up, why?

Is it normal to smell "gassey exhaust" upon the first startup of the day? No black smoke. Exhaust leak or bad O2 sensor? :confused:
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Old May 15, 2002 | 12:32 PM
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Default Re: Gassey smell upon first start-up, why? (FlyboyZR1)

I don't smell it in my 87, but yours might be excessive rich startup.
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Old May 15, 2002 | 01:25 PM
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Default Re: Gassey smell upon first start-up, why? (jfb)

What would cause it to run rich on startup?
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Old May 15, 2002 | 01:28 PM
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Default Re: Gassey smell upon first start-up, why? (FlyboyZR1)

Leaky injector(s). Is it at all hard to start?
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Old May 15, 2002 | 01:29 PM
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Default Re: Gassey smell upon first start-up, why? (92Shawnster)

sounds like leaky injectors
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Old May 15, 2002 | 02:49 PM
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Default Re: Gassey smell upon first start-up, why? (92Shawnster)

Leaky injector(s). Is it at all hard to start?

That's funny though because it's not hard to start up at all. Fires up with a roar every time.
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Old May 15, 2002 | 03:42 PM
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Default Re: Gassey smell upon first start-up, why? (FlyboyZR1)

It may be your FPR going. I was getting a gassy smell for a few weeks, but the car would start fine.. after a few weeks, however, it became very difficult to start, and was idling very rough. I finally pinned it down to a broken membrane in the FPR.. Replaced the FPR, and now, no gassy smell, and it starts up fine.
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Old May 15, 2002 | 10:15 PM
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Default Re: Gassey smell upon first start-up, why? (MarkLT1)

It could also be the fuel canister , its solenoid or break in the rubber line from the canister to the intake..just my $.02 worth.
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