89 code 33 Maf
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From: So. Cal.
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89 code 33 Maf
89 vette. Getting code 33, My scanner says. MAF to high. Yesterday, I put a new serpentine belt on and had my maf off. After I started it yesterday, here comes check engine light. Unplugged batt. Restarted. all good. On my way home from work today, here comes the CEL. Any suggestions?
Thanks all for your input.
Mike
Thanks all for your input.
Mike
Last edited by CorvetteMike2024; Feb 25, 2009 at 07:07 PM.
Le Mans Master
Joined: Jul 2007
Posts: 5,043
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From: Tampa Florida
Your car is telling you that the voltage is too high on the hot wire filiment in relation to the amount air flow through the unit. Clean or change the air filter(if running an oil charged filter do not over oil the filter) and clean the MAF's filiment with MAF cleaner. Remove any debris stuck to the screen on the front of the MAF's air flow intake side.
Melting Slicks
Joined: Aug 2003
Posts: 3,378
Likes: 388
From: Lakeville MI
Re-check your connection at the MAF.
The MAF signal wire is pulled up to 5 volts by the ecm, so an open circuit on the signal wire will result in the MAF high fault.
Since you recently had this apart, it is possible that you bent a pin or somehow degraded the connection.
The MAF signal wire is pulled up to 5 volts by the ecm, so an open circuit on the signal wire will result in the MAF high fault.
Since you recently had this apart, it is possible that you bent a pin or somehow degraded the connection.
Thread Starter
Corvette Enthusiast
Joined: Oct 2007
Posts: 6,787
Likes: 2,690
From: So. Cal.
2025 C7 of the Year Finalist- Unmodified
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2023 C7 of the Year Finalist - Unmodified
Maf
I cleaned the MAF with MAF cleaner last night. Drove to work and back today, all good. Checked all my connections.
I have owned this vette for 20 years. Seems like I have MAF issues about every two years. My car has 200,000 + miles. Still have the origanal TPS, IAC, and EGR.
Thanks for help
Corvette Mike
I have owned this vette for 20 years. Seems like I have MAF issues about every two years. My car has 200,000 + miles. Still have the origanal TPS, IAC, and EGR.
Thanks for help
Corvette Mike
Le Mans Master
Joined: Jul 2007
Posts: 5,043
Likes: 7
From: Tampa Florida
I cleaned the MAF with MAF cleaner last night. Drove to work and back today, all good. Checked all my connections.
I have owned this vette for 20 years. Seems like I have MAF issues about every two years. My car has 200,000 + miles. Still have the origanal TPS, IAC, and EGR.
Thanks for help
Corvette Mike
I have owned this vette for 20 years. Seems like I have MAF issues about every two years. My car has 200,000 + miles. Still have the origanal TPS, IAC, and EGR.
Thanks for help
Corvette Mike
I'm at ~250K.......
