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4g63 problems

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Old 01-15-2006, 03:02 PM
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Unhappy 4g63 problems

For some reason when I am in boost my car will start to hesitate as if the injectors are fouling. I am not getting any signs from my turbo as if it were going bad and I have the boost set to low. I almost want to say that it could be my stock intercooler piping going bad. Any help is appreciated.
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Old 01-15-2006, 03:09 PM
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When was the last time you changed your plugs and wires?

Have you done a boost leak test?
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Old 01-15-2006, 03:18 PM
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what do you mean hesitate? does it misfire? splutter? just lack power? if its spluttering its most likely a fuel issue(injectors, filter, fuel pump, etc)
Old 01-15-2006, 03:37 PM
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Well I took my car to mitsubishi to get an engine flush and my fuel system cleaned. They also ran a diagnostic on my car and said that nothing was wrong. My iridium spark plugs are fairly new and I bought some new wires like a couple weeks ago. When I say that it hesitates it almost spudders but not bad. It will do this if I get passed 3 grand and have the peddle more than 30%. I am kinda lost.
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Old 01-15-2006, 03:38 PM
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ok that rules out fuel and spark. have you checked for boost leaks?
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Old 01-15-2006, 03:59 PM
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No how do I go about doing that?
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Old 01-15-2006, 04:12 PM
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the best way is to go to home depo and buy a rubber coupling the size of your turbo inlet make a small hole in the middle then using an air hose with a blower fitting blow air in through the turbo and then seal the hole with your finger and listen for any air escaping.
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Old 01-16-2006, 02:39 AM
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Originally Posted by naciamaj
My iridium spark plugs are fairly new.
Use NGK BPR6ES instead. or BPR7ES depending on your mods.
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Old 01-16-2006, 06:50 AM
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another way similiar to what dario said is to get a rubber coupling from home depot in the plumbing section and also get a pvc end cap that will fit in the end of the rubber coupling and drill a hole in it, and put a valve stem in it.
Go to the gas station fill it with air and listen for a leak.
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Old 01-16-2006, 07:28 PM
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Originally Posted by naciamaj
Well I took my car to mitsubishi to get an engine flush and my fuel system cleaned. They also ran a diagnostic on my car and said that nothing was wrong. My iridium spark plugs are fairly new and I bought some new wires like a couple weeks ago. When I say that it hesitates it almost spudders but not bad. It will do this if I get passed 3 grand and have the peddle more than 30%. I am kinda lost.
well iridium plugs suck for dsm get rid of those for a start go with bpr7es or 6es if not change your wires but use stock wires from the dealer dont use the ones they sell at discount they suck also. and also is your car a complete 6 bolt or 7 bolt?
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