Geo Cars & Trucks - Page 8 - Recent Questions, Troubleshooting & Support
94 Automatic Geo Metro 3 Cyl. Map Sensor - EGR Valve
Unfortunately, both of these items are equally important and repairs can't normally be avoided by taking care of your car.
Your MAP (Mass Air Pressure) Sensor measures intake manifold vacuum pressure to help control the air and fuel mixture and timing. It contains a pressure-sensitive element that connects to an electronic circuit, generating a signal that changes with pressure changes in the manifold.
Your EGR (Exhaust Gas Recirculation) valve recirculates exhaust gases through the intake manifold to be burned again, cooling peak combustion temperature. Dilutes the air and fuel mixture to keep the nitrogen oxide emissions within breathable limits. And yes, it could very well be that the EGR solenoid that is causing the issue.
Both units effect your vehicle's fuel/air mixture. This is important because your vehicle running lean/rich can cause "snowball" problems. For example, a faulty EGR can cause the vehicle to run rich/lean. If not repaired, in time, the exhaust caused by the wrong rich/lean fuel mixture can damage the O2 sensors and/or catalytic converter.
If I had to pick, I'd start with your MAP Sensor. One guess I would have is that your MAP Sensor failed and made your vehicle start burning the wrong fuel/air mixture. Assuming I'm right, this could have damaged the EGR Valve. So, I see no reason to replace the EGR Valve alone, just so it too can be damaged by the poor fuel/air mixture caused by the still-faulty MAP Sensor. If your lucky, you may see the faulty EGR code disappear once your MAP Sensor is replaced.
Hope this helps and good luck!
How to locate and change temperature sender 2 gauge on a 1990 Geo Prizm
you can get guide from many sites.. i know few
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How to remove 1991 Geo Tracker radio? Do I need any special radio removal tools, or where do I start?
Hi there's this website something like reliable-store and it is very amazing for manual for repairing servicing anything
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They have full manuals and it's verrrrry cheap and mine
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Try these out brother
Can i obtain a copy of the wiring diagram for the distributor connector for 93 geo tracker 1.6?
Hi there's this website something like reliable-store and it is very amazing for manual for repairing servicing anything
someone on fixya recommended it to me and I thank him even today
They have full manuals an d it's verrrrry cheap and mine
I got free in offers
3rd time I also had an issue with
the file so the girl replaced it in 30 mins
there is one more but i don't remember its name it was 2 years back bitman something link this
Try it out brother
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