Suggestions for 02 P5 Engine Problem Fixing

[limate]

Hi All,

I recently got CEL on for my 2002 P5 with code P0300 to tell that multiple random missfires have occurred. It did show up intermittently for couple of weeks, and I had to bring it to a local Mazda dealer for a paid diagnosis. The car mileage is barely over 50K miles.

The dealer's written report stated that the EGR valve and gasket need to be replaced, and PCM to be updated. There was also a line mentioning TSB #01-028/05, and I do not know if it is related to the PCM update.

The problem is that the repairing work listed above was quoted as $520. I remember reading some article in this forum saying fair EGR replacement should be no more $250. Since the dealer told me the EGR parts ordering would take 4-day if I want to get it repaired, I decided to drive the car back home today before further decision. The dealer told me there may be an additional diagnosis charge of $125 if I bring the car back to them to fix.

My questions are list below, and I appreciate any helpful suggestions.

1. Is it necessary to do the PCM update? Will EGR replacement be enough?

2. Where could I find out the details of TSB #01-028/05?

3. Would be it better if I order the EGR parts by myself and find other mechanics to do the labor?

 

[flash75]

This thread has some infromation on tsb 01 028 05.
http://www.mzspd6.com/forum/showthread.php?t=123654270

I don't kwow the answer to the PCM update. I have an 02 Protege 5 with 67k miles and it has never had a PCM update or a check engine light.

You may come out ahead if you order the parts and have another mechanic do the work. Before having it done by another mechanic you should find out what happens if the EGR isn't the problem. Most garages make a little profit on parts they purchase and should warranty their work. They probably wouldn't warranty their work if you bring in the parts and told them another mechanic said the EGR is bad.

Clifton

 

[limate]

Decided to DIY

Clifton,

Thank you so much for the warm help.

I happened to read the EGR clean thread, and decided it to DIY after receiving the ordered part.

I will update after working on this project.

Regards,

Limate

 

[limate]

DIY with success

It is a great experience that I replaced the EGR valve by myself today although it took me couple of hrs because of the small room to get tools in although I removed the battery and hoses.

The old EGR was not so bad with carbon build-up. Test drive showed idle speed change from 600 to 800 rpm although I reset the PCM.

A trick for ordering parts: the ordered EGR valve came with a gasket although I put another separate gasket order. It was a waste for me. .