From the guys I saw on YouTube (MRT and someone Thornton performance they hook up a injector style machine to the throttle body and it sprays a solution in on pulses and cleans it's out and they show before a and afters and it's clean probably not 100% like changeling it out bit for 700 and two hours seems like a better option and the engine light has cleared itself now
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You've mentioned engine repairs aren't your thing, so I'll use almost 30 years of engine building experience to explain it, simply
Consider that intake manifold as your ear. In your entire lifetime, your ear has never been cleaned of any build up. It's full of waxy, greasy, gritty, oily, crunchy crud. Heaps of it. So you go to the Doc, he cuts your ear off, sends it to 4wd26 who then starts the cleaning process.
Depending on the ear crud you have accumulated over the years, no doubt this process starts with a scraper, digging out the loose build up. Then of to a cleaning solution to dissolve the bulk of the crud. Quick smash with a pressure cleaner then off to a bead blaster for an entire clean back to bare skin.
After a blast, your ear will be inspected for any other damage, checked for straightness, a final wash and sent back to the Doc. (I'm only assuming this is what he does
)
So the Doc then stitches your ear back on and your as good as gold for another many more years. Happy days
Or, you could go to the markets, visit someone in a marquee. He sits you down, connects a can of cleaner up to your ear, and slowly injects it down, to wash all that crud.......... Out through your nose!
Now you know this isn't going to work well, you know it's going to hurt everything between your ear and your nose, but hey, it's cheaper.
So your eyes water, your throat hurts and you can taste that abrasive cleaner and crud combination. You think 'how can I taste this stuff? It went in my ear.......'
Same thing happens in your engine. It goes everywhere!
Your valves, seats, rings, guides, bore, oil, bearings etc, will hate your guts for doing this to it. It goes everywhere through your engines respiratory and cardiac systems. It's hurting it.
All that carbon and oily crud is a byproduct of combustion. It didn't burn the first time, it won't burn again. Your engine 'passed it' like a bad stone, don't make it pass it again, it's painfull.
My suggestion is to remove your engines ear, get its wax cleaned out, refit the ear and do away with the EGR, so it doesn't have ear wax issues again. I'm a non believer of ear cleaner in a can.
Shane.