Quote:
Originally Posted by Andrew63
More info - LittleGreenCar has 350,000+ miles. A lot of this was stop and go rush hour traffic.
So, I'll go after the idea of hard carbon first, and attack that with Seafoam.
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After the seafoam treatment, I would also pull off the EGR and check for blockage. I don't think seafoam can get to the EGR circut and clean it and with 350k miles, it might need a cleaning. Not long ago I was in O'Reilly's and they had seafoam on sale for ~$6.66/ can (buy 2 get one free).
Make sure you perform the treatment late at night, and/or well away from the city and any other groups of people. It causes a HUGE cloud behind the car, and it is not good for your health!
Of how my dad described the treatment, you will need some vaccume hoses and a "T" adapter. Hook up a vaccume hose to one of the ports on the throttal body to the T adapter, then from the T adapter to the can. Start the car (check if warm/cold start is ideal in the manual), and let it idle. Every so often, plug off the T adapter to make it suck in extra seafoam. When the can is nearly empty, plug off the T adapter and flood the engine (make it die). Let it sit for atleast 30 mins. Make sure you could change the spark plugs since this treatment does not do any good on them. Plug wires never hurt to change, but that depends how old yours are.
Lastly, let us know the results!