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Topic: 1980 L-48 hesitation

in Forum: C3 Engines

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1980 L-48 hesitation

Posted: 6/15/11 7:46am Message 1 of 6
kwgilf
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Kentwood, MI - USA
Joined: 6/11/2011
Posts: 10
Vette(s): Currently own: 1980 L-48 automatic. Custom painted in gray metal flake with silver hood accent. Oyster interior. Previously owned: 1976 silver Sting Ray with black interior. 1980 L-48 black with oyster interior.
While cruising, not while accelerating, there is a very slight hesitation. When the A/C is on, this is more noticeable. Any ideas what is causing this?


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1980 L-48 hesitation

Posted: 6/15/11 10:14am Message 2 of 6
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aceinthehole
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Manteca, CA - USA
Joined: 11/20/2005
Posts: 3623
Vette(s): 1978,two tone,Metalic Rootbeer & gold 1975 L48 4 speed
Hi Kevin, need a little more description. Do you mean as you are cruising at a steady speed, without depressing the accelerator, the motor coughs or stutters or something ?


Jimmy B.
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1980 L-48 hesitation

Posted: 6/15/11 10:35am Message 3 of 6
kwgilf
Former Member
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Kentwood, MI - USA
Joined: 6/11/2011
Posts: 10
Vette(s): Currently own: 1980 L-48 automatic. Custom painted in gray metal flake with silver hood accent. Oyster interior. Previously owned: 1976 silver Sting Ray with black interior. 1980 L-48 black with oyster interior.
Yes, cruising at a steady speed without depressing the accelerator. It doesn't cough or stutter, just a slight rhythmic hesitation that is more noticeable when the A/C is on. I replaced the fuel filter and it did not improve.


1980 L-48 hesitation

Posted: 6/15/11 10:41am Message 4 of 6
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Adams' Apple
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Duncanville, TX - USA
Joined: 11/8/2003
Posts: 20214
Vette(s): #1-1974 L-48 4spd Cp Med Red Metallic/Black deluxe int w/AC/tilt/tele./p/w-p/b/ Am-Fm/map light National/Regional/Chapter NCRS "Top Flight" #2-1985 Bright Red/Carmine Cp.L-98/auto Member: NCRS, NCRS Texas, Corvette Legends of Texas
[QUOTE=kwgilf] just a slight rhythmic hesitation that is more noticeable when the A/C is on. [/QUOTE]

Are you sure what your feeling is NOT the A/C compressor kicking in/out?
Other than that, it could be the EGR valve, or the solenoid for it not operating properly....



Joel Adams
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1980 L-48 hesitation

Posted: 6/15/11 12:31pm Message 5 of 6
kwgilf
Former Member
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Kentwood, MI - USA
Joined: 6/11/2011
Posts: 10
Vette(s): Currently own: 1980 L-48 automatic. Custom painted in gray metal flake with silver hood accent. Oyster interior. Previously owned: 1976 silver Sting Ray with black interior. 1980 L-48 black with oyster interior.
It also hesitates when the A/C is off, just not as noticeable.


1980 L-48 hesitation

Posted: 6/22/11 5:57pm Message 6 of 6
kwgilf
Former Member
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Kentwood, MI - USA
Joined: 6/11/2011
Posts: 10
Vette(s): Currently own: 1980 L-48 automatic. Custom painted in gray metal flake with silver hood accent. Oyster interior. Previously owned: 1976 silver Sting Ray with black interior. 1980 L-48 black with oyster interior.
Broke down and took it to a mechanic. EGR Valve was ok, carb was running too lean. Adjusted carb and everything is good. Thanks all for the comments, 


in Forum: C3 Engines


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