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| 30 MPG on a 95 3 Cyl?!?!?!; Check engine code 13 and 51... | |
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| Tweet Topic Started: Dec 13 2008, 12:37 AM (2,266 Views) | |
| rr87 | Dec 13 2008, 12:37 AM Post #1 |
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50 MPG!
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Hey everyone...I decided to check how many MPG I could get driving it nicely but the results weren't satisfactory. I only got 30 MPG as the title says, but I have to say the check engine code 13 came up. So could it be the reason why I'm not getting better MPG??? Any advice is highly appreciated, thanks in advance. |
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| Johnny Mullet | Dec 13 2008, 02:18 PM Post #2 |
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Fear the Mullet
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Check engine code 51 tell me you have clogged up EGR ports which also causes exhaust valves to burn. Remove the EGR and clean it well. With the EGR off, start the car. You should notice a pronounced exhaust leak from the port through the head. If not, then the port is plugged. After you are done with that, perform a compression test on all cylinders to check the valve condition. |
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| z34-5speed | Dec 13 2008, 05:27 PM Post #3 |
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Formerly "Tech Certified"
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13 is the o2 sensor. When i first got my Metro the o2 was bad. After i changed it the car ran much better. I'm not sure on the 95, but on my 92 the o2 was only $20. |
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| Hacksaw | Dec 14 2008, 05:28 PM Post #4 |
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Disciple of Johnny Mullet
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Code 13 (O2 Sensor) is causing your Metro's computer to run in an "open loop" mode...poor fuel economy is the result. EGR passages are surely blocked with carbon as well, which is the reason code 51 is being thrown. Throttling the gas while looking at the rubber diaphragm of the EGR valve will tell you if the EGR valve itself is operational. If it moves, it's working. if it doesn't, it may be clogged with carbon, not receiving vacuum, or damaged itself. Either way, the passage from the exhaust manifold, through the cylinder head, and then through the intake manifold is most likely plugged solid with carbon. Separating the exhaust and intake manifolds from the cylinder head is the only sure-fire way of cleaning the passages properly. Hacksaw. |
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| Will | Dec 14 2008, 10:41 PM Post #5 |
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Victory is mine!!!!
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I would get on the EGR problem ASAP... It can cause a lot more problems than just the code. Here is a thread on cleaning the EGR system. EGR SYSTEM CLEANING |
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| rr87 | Dec 14 2008, 11:33 PM Post #6 |
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50 MPG!
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I bought the Oxygen sensor tonight, since I'm planning on taking a long trip soon. I will clean the EGR Pressure Transducer tomorrow morning and see if it helps...thanks for the advice guys. |
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7:33 PM Jul 10