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i have a 1992 chevy blazer 4x4. check engine light came on yesterday, after i turned off the engine, it went off.i use this vehicle to deliver the mail in. it blows black soot out of the tail pipe when i start it. has had new plugs wires almost all is new. it also smells like something is burning when my heat is on. i thought it was catalytic converter, but i took it to a auto zone and they plugged it in and it says altitude sensor, they did not know what it was. so what is a altitude sensor? is it a oxygen sensor? please help, thanks, terry anne

Submitted: 672 days and 18 hours ago.
Category: Chevy
Value: $15
Status: AWAITING EXPERT REPLY
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Optional Information

Optional Information:
1992 blazer 4x4 taho 4.3

Already Tried:
has almost all new parts except water pump, o2 sensor was put in last year.

Accepted Answer

They probably mean a MAP sensor (manifold absolute pressure).What is the 8th digit of the veh ident #?

Picture
Expert: CCTMSTR
Pos. Feedback: 100.0 %
Accepts: 222
Answered: 1/6/2008

GM Certified Master Technician

GM Master Technician.ASE Master.Advanced Level L1. NV State G2 Emission Inspector

672 days and 17 hours ago.

Reply

hi thanks for being so quick. i will return with 8th digit number in 3 minutes, i will be back. hold on, it is a z or a 2

672 days and 17 hours ago.

Reply

it is a z or a 2 is the 8th digit. thanks,

Accepted Answer

(Z) is the digit 4.3 LTR.OK if it is/was a MAP code you can check the vacuum line from the MAP sensor to the intake manifold The MAP sensor is a black rectangle sensor,it will usually have a green (3) wire connector attached to it with a vacuum line at the bottom.Check the vacuum line for being brittle,split or collasped

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Expert: CCTMSTR
Pos. Feedback: 100.0 %
Accepts: 222
Answered: 1/6/2008

GM Certified Master Technician

GM Master Technician.ASE Master.Advanced Level L1. NV State G2 Emission Inspector

Posted by CCTMSTR 672 days and 17 hours ago.

Answer

Did you get the post?

672 days and 17 hours ago.

Reply

Reply to cctmstr's Post: thank you great feedback was left, and your payment, but some how i paid it twice. do not know what happened there.

Posted by CCTMSTR 672 days and 17 hours ago.

Answer

Ask a moderator to refund 1 payment

672 days and 17 hours ago.

Reply

Reply to cctmstr's Post: i will do that. thanks, once again, a very smart man.... god bless you, terry

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