diagnostics codes

[bhw33191]

ok i have to type this in literally 1 minute. ok so i did the thing with the paperclip on terminals A and B. If i'm not mistaken it did the code twelve thing "as its suppose to i bleive" then this is what it said "or atleast what i had to time interpret." It went: blink blink blink, short pause, blink blink blink blink. then i think there was another code which went: blink blink,pause, blink blink blink blink. I have to do this again later when theres more time but hopefully someone (Cough silicon) can interpret what this means. (I might have mis-interpreted a code but w/e its enough to start with)

['97ventureowner]

It's been awhile since I obtained codes from an OBD1 equipped vehicle, but I believe when you read the codes, you get the "12" first, then the actual codes if there are any stored. The ones that follow, are repeated twice, so I think you might have missed the first flash of the second display of the code '34', thinking it may have been '24'. There is usually around a 4 second pause between the display of any stored codes to help distinguish between the different ones.Code 34 indicates a MAP sensor signal out of range on the low side.

[silicon212]

To further expound on what '97 stated, you get the MAP sensor error whenever there is a serious reduction in manifold vacuum (i.e. a vacuum leak). Another possibility is a broken or plugged vacuum line to the MAP sensor. This is one of those hard lines (plastic) and I've seen them plugged with debris before - on my own car. The MAP sensor will be in one of two places - either on the inside of the passenger fender or on a bracket behind the carburetor. It will have three wires and a vacuum line attached at the bottom, it's a rectangular shaped thing about 1.5" tall by 2" wide and a half inch or so deep.

[bhw33191]

Originally Posted by '97ventureowner

It's been awhile since I obtained codes from an OBD1 equipped vehicle, but I believe when you read the codes, you get the "12" first, then the actual codes if there are any stored. The ones that follow, are repeated twice, so I think you might have missed the first flash of the second display of the code '34', thinking it may have been '24'. There is usually around a 4 second pause between the display of any stored codes to help distinguish between the different ones.Code 34 indicates a MAP sensor signal out of range on the low side.

yup i was thinking the same thing. i MUST have messed up a code and mixed up 34 with 24 or but it seems the code must have been 14 actually because code 14=an error with the CTS which just so happens to need replacing because its all melted and shorted out.

[bhw33191]

Originally Posted by silicon212

To further expound on what '97 stated, you get the MAP sensor error whenever there is a serious reduction in manifold vacuum (i.e. a vacuum leak). Another possibility is a broken or plugged vacuum line to the MAP sensor. This is one of those hard lines (plastic) and I've seen them plugged with debris before - on my own car. The MAP sensor will be in one of two places - either on the inside of the passenger fender or on a bracket behind the carburetor. It will have three wires and a vacuum line attached at the bottom, it's a rectangular shaped thing about 1.5" tall by 2" wide and a half inch or so deep.

Do i even have a MAP sensor? i thought those were only with fuel injected?

[silicon212]

MAP stands for Manifold Absolute Pressure and all carbureted computer cars have one, some FI models do not. Another name is 'vacuum sensor', which is what it is.