Hi. So I bought an 2001 v4 Honda Accord at first it drove great. After I put a 1000 mile on it started shaking while driving. Took it to AutoZone and they did a scan. It came back as Cylinder 3 misfire so I changed the spark plugs and the cables. It didn't do nothing. a week after that the car started to turn off when I came to a stop and the ck engine light blinked when it was driven in low speeds. I took it to a shop and they ck it, told me that they did a compression test and cylinder 3 came back with 10 psi and told me that it maybe a broken valve but they where not sure so they had to verify it more, they gave me an estimate of 600+ dollars for the fix witch I found a bit excessive. Is that kind of price good for the work that has to be done in the car?

Any help will be appreciate it.

 

if they do a leakdown test to verify it's a bad valve then $600 is a reasonable price to pull the head and replace the valve

it's a little bit of work to pull the head and then have a machine shop replace whichever valves have issues, then put the head back on

if they are saying $600 to further diagnose then that's excessive, a leakdown test should only take an hour or so and that would be $100-$150

 

With basic hand tools you can check if the valves are in need of adjustment. You may be lucky and it is simply the valves are out of adjustment.

 

with the 3rd cylinder showing 10 psi it's not likely a valve adjustment issue

 

It's a lack of compression issue. A valve hanging open would cause a lack of compression issue and it's a near freebie to check.

 

I definitely agree that an engine needing a valve adjustment can have compression loss but I don't think that a valve adjustment is going to fix compression loss of this nature, if it is indeed due to valves out of adjustment.

 

IT shows a P01491 code recently wich indicates bad EGR, can this be the issue? I read some about it and it says bad EGR's can cause problems like this. I just want to verify before I buying parts left and rigth.

 

P01491 is for insufficient lift. This is a problem with EGR valve or wiring to the EGR valve. It is electric, not vacuum controlled.
Do you have an FSM for troubleshooting the EGR?