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Old 04-10-2019   #33
Ccmano
 
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Join Date: Jun 2006
Location: Sparks, NV
Posts: 2,852
Default Re: 1990 ZR-1 Hesitation when full Power

Quote:
Originally Posted by frantinoro View Post
So the system JUST threw a code 55, which it has never done before. Also at the risk of sounding stupid where is the second map sensor?
MAP sensors are at the back of the plenum, likely the one you are aware of, and under the ECM Mount. Code 55 is a “Fuel lean” code which could coincide with either a vacuum leak, fuel supply issue or both.
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Last edited by Ccmano; 04-10-2019 at 08:14 PM.
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