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The mkiv Supra Owners Club

Boost Misfire


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I couple months ago I had a front mount intercooler added to my Euro Spec TT. The only other parts installed are a Apexi exhaust with downpipe and a blitz intake. Now as soon as I get into load, 2 to 5 lbs the car breaks up, misfire and never gets above 3 lbs. I drive the car once a month and thought it might be a boost leak from the intercooler install. I finally got around to checking and I don't have a boost leak, so now what...

 

I thought it might be the coil or coil connectors, but reading the forum it seems that only happens in higher boost levels...

 

FYI the battery terminals touched the hood during the intercooler installation and shorted out the radio and amp. Is it possible this could have shorter something else out?

 

Any idea where to turn would be helpful...

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I couple months ago I had a front mount intercooler added to my Euro Spec TT. The only other parts installed are a Apexi exhaust with downpipe and a blitz intake. Now as soon as I get into load, 2 to 5 lbs the car breaks up, misfire and never gets above 3 lbs. I drive the car once a month and thought it might be a boost leak from the intercooler install. I finally got around to checking and I don't have a boost leak, so now what...

 

I thought it might be the coil or coil connectors, but reading the forum it seems that only happens in higher boost levels...

 

FYI the battery terminals touched the hood during the intercooler installation and shorted out the radio and amp. Is it possible this could have shorter something else out?

 

Any idea where to turn would be helpful...

 

Found the answer...the stereo amp was damaged and the car runs a bit too rich and the plugs were fouling. Need to find out why its so rich...thanks

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