Question about 2001 Mitsubishi Galant
I have done a tune up and other needed maintenance. the plugs, wires, dist. cap, pcv valve, valve cover gaskets, both downstream sensors, egr valve, egr solenoid, changed oil and filter, flushed tranny,throttle body gasket, cleaned intake manifold and replace plentum gasket, have no vacuum leaks and getting correct fuel pressure. all codes wents away except the po300 I have had the fuel injectors checked.
Here's a link on your code.You have spent a ton of money and the dealer would of done it cheaper.I take my vehicles to dealers for oil changes,they scan and will tell me for free what is wrong since I went there for a oil and not a repair job.Then I can fix my self and not be charged for there labor.
Posted on Jun 03, 2013
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Posted on Jan 02, 2017
That is all the basic stuff unless you feel you need to change injectors or knock sensor which probably isn't necessary. The intake has about 8 bolts that you can remove after all vacuum lines are disconected. If you would like further detail and illustrations, I suggest go to autozone.com and register for free, then you can view a full free online repair manual
Posted on Jul 09, 2009
I am having the same issue on Mitsubishi Galant 02. Clattering on acceleration, herky jerky idle. Pulled a code multiple cylinder misfire. My mechanic's diagnosis is bad valve cover gasket causing oil to seap into the spark plugs and bad timing belt, which I have not replaced at 150k miles. I do however know my fuel injectors do need cleaning, he hasn't ruled that out either. Have you pulled any code on it? I have read on engine knock sensor going out on some of these also. Hope this helps some.
Posted on Oct 22, 2010
SOURCE: REplaced the cat and 02
P0421....Warm Up Catalyst Efficiency Below Threshold (Bank 1) check the heater circuits on the O2 sensors ,the two wires the same colour are the heater wires check across these two for 12v with ignition on and engine running
P0421....Warm Up Catalyst Efficiency Below Threshold (Bank 1)
check the heater circuits on the O2 sensors ,the two wires the same colour are the heater wires check across these two for 12v with ignition on and engine running
Posted on Aug 27, 2011
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