81 Corvette MAP Sensor bypass???????
Abby Normal
Joined: Dec 2001
Posts: 53,287
Likes: 92
From: Press "2" for English
considering the computer uses this sensor and the O2 sensor as the primary inputs to determine correct spark timing and fuel solenoid cycling, my guess is the only "bypass" would be a holley and vacuum distributor.
i had an intermittant problem with mine years ago and found that some dielectric grease in the electrical plug and a little lube on the vacuum port solved it. i was searching for a new one but never found a replacement. most people don't even know the '81 has one or where it's located, much less where to find a replacement
i had an intermittant problem with mine years ago and found that some dielectric grease in the electrical plug and a little lube on the vacuum port solved it. i was searching for a new one but never found a replacement. most people don't even know the '81 has one or where it's located, much less where to find a replacement
Tech Contributor
Joined: Jun 2004
Posts: 20,827
Likes: 959
From: I tend to be leery of any guy who doesn't own a chainsaw or a handgun.
Originally Posted by clutchdust
considering the computer uses this sensor and the O2 sensor as the primary inputs to determine correct spark timing and fuel solenoid cycling, my guess is the only "bypass" would be a holley and vacuum distributor.
i had an intermittant problem with mine years ago and found that some dielectric grease in the electrical plug and a little lube on the vacuum port solved it. i was searching for a new one but never found a replacement. most people don't even know the '81 has one or where it's located, much less where to find a replacement
i had an intermittant problem with mine years ago and found that some dielectric grease in the electrical plug and a little lube on the vacuum port solved it. i was searching for a new one but never found a replacement. most people don't even know the '81 has one or where it's located, much less where to find a replacement
ps: Clutchdust: Despite the fact that I occasionally run C4 wheels on my own car, yours is the first C3 I've seen that looks good with those wheels. Nice combo! (Not the best wording, but please take it as a compliment.)
Safety Car
Joined: Dec 2004
Posts: 4,071
Likes: 0
From: San Diego CA
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Team Owner
Joined: Oct 2004
Posts: 23,831
Likes: 10
From: Springfield MO
St. Jude Donor '07
Originally Posted by MsVetteMan
Another reason why it's smart to ditch that POS computer........just ditch and enjoy whatever mods' you want. 
Safety Car
Joined: Dec 2004
Posts: 4,071
Likes: 0
From: San Diego CA
Originally Posted by I'm Batman
Better than wasting fuel on technology that was outdated when LBJ was President.
C3s were designed to use either a Holley or a q-jet. '82 is the exception.
Team Owner
Joined: Oct 2004
Posts: 23,831
Likes: 10
From: Springfield MO
St. Jude Donor '07
Originally Posted by Kalway
If that's the case, the very engine we use was designed in 1955, so why aren't we using rochester mechanical fuel injection?
C3s were designed to use either a Holley or a q-jet. '82 is the exception.
C3s were designed to use either a Holley or a q-jet. '82 is the exception.
If you want to go NCRS, install a carb. For performance and fuel economy, EFI is the way to go.
Safety Car
Joined: Dec 2004
Posts: 4,071
Likes: 0
From: San Diego CA
Originally Posted by I'm Batman
By that logic, the C4 was designed to use the old cease-fire system. I guess they shouldn't have ever upgraded to the TPI, LT1, LT4 or, heaven forbid, the LT5. I guess everyone here who has upgraded a C3 to use EFI is wrong, too.
If you want to go NCRS, install a carb. For performance and fuel economy, EFI is the way to go.
If you want to go NCRS, install a carb. For performance and fuel economy, EFI is the way to go.
