Hello everyone,
I am new to the site and have a 00 civic si. It has about 89,000. I purchased the car just recently and notice a problem. I took it to the mechanic and he diagnosed it with codes P0172 (System running rich) and P1457 evap system leakage. The car also shakes at idle and sometimes rpms go very low. Mechanic drove the car and was puzzled by the fact that it would barely peel out on 1st gear. He did almost everything to diagnose it, and the last thing he did was a compression test. The numbers were as follows:

From left to right

Cyclinder 1: 185 psi Cylinder 2: 185 psi Cylinder 3: 153 psi Cylinder 4: 185 psi

Since cylinder 3 is inconsistent, he says there is my PROBLEM. Now the question is what is next. He said I need a new head.

ALL HELP WILL BE APPRECIATED.

Thanks

 

i think your first problem is having a mechanic who tries to peel out in your car that doesnt run right.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by count me out &raquo;</TD></TR><TR><TD CLASS="quote">i think your first problem is having a mechanic who tries to peel out in your car that doesnt run right.</TD></TR></TABLE>

x100000

 

Take it to a different shop, as I'm almost certain you don't need a new head. It sounds like this guy is far from an expert, and a new cylinder head is an expensive gamble.

I have a hunch that you may have a stuck or faulty #3 injector that is dumping too much fuel and washing down the cylinder walls. Try swapping the #3 injector to a different cylinder and see if the compression issue follows it. Be careful not to tear or damage the injector O-ring seals.

The P1457 (EVAP leak) is likely due to a faulty fuel vent shut off valve and is unrelated to your poor running problem.