EGR Valve cleanup ?

[hassoun]

Hey guys, i did the impossible trying to solve my p0300 misfiring code. i've changed spark plugs and got the New Bosch fusion IR for 20$ a piece. changed wires, sea-foamed,cleaned MAF, throttle body, checked coils, and nothing seemed to fix the problem. im thinking it could be either the EGR valve is dirty or a clogged cat maybe. what is the best way to clean an EGR valve ? would a throttle body cleaner work or do i need something else ? asking your help just to be on the safe side.

 

[Thumper8302]

id go with either brake cleaner or throttle body cleaner.. just make sure u let it dry and air out completely before re-installing the egr valve..... and make sure the gasket is still good or o-ring.. not sure what these have...

 

[BOSS]

Clear the codes, disconnect the cats at the header flange and run the truck for a bit, check the codes. It's gunna be loouud.

No other pending codes? Might be a fuel pressure issue.


B

 

[hassoun]

i will be checking my fuel pressure sometime today. and will adjust the regulator if it needs any adjustments. the thing is it doesnt misfire all the time. so the code comes and goes. thanks for the replies guys

 

[hassoun]

cleaned the EGR valve and tried to adjust the FPR. cant get higher than 40 PSI at idle. its supposed to be 56.6-58 PSI. im thinking its a fuel pump thats about to go bad ? any thoughts ?

 

[kickitandholdit]

ducktape. . .

haha kidding. might as well go ahead and replace the fuel pump before it quits on you when you really need it. better off knowing you got a new fuel pump than guessing when the one you got is going to go out.

 

[hassoun]

lol. it turns out it was a bad fuel pressure regulator. i swapped it under warranty and adjusted the pressure to 58PSI as justin from BB recommended. the truck still misfires on cylinders 1 3 5 and 7. 5 misfires the most. i cant think of anything else but a clogged cat. what do u guys think ? any of you running magna flow cats or flowmasters ?