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TPI Tuned Port Injection discussion and questions. LB9 and L98 tech, porting, tuning, and bolt-on aftermarket products.

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Old 02-25-2006, 09:11 AM   #1
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EGR on TPI
will blocking off the EGR..a) trigger a code?, b) affect performance?, c) fail a sniffer test? i'm retro fitting tpi on a 355 in my '83 cfi z-28...
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Old 02-25-2006, 10:42 AM   #2
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Some people have reported getting a code, but many do not, and it's harmless anyway. Generally performance improves without EGR. The removal increases ease of tuning and troubleshooting.
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Old 02-25-2006, 03:07 PM   #3
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Only proper way to disable EGR is to block it off and also turn it off in the code.

More details for the code end on the DIY PROM board.

Just blocking it off, stops the exhaust gas from entering the engine, but the routines still run in the computer, such as lenaing it out slightly and advancing the timing when egr is still active in the ecm/code end.

later
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Old 02-25-2006, 03:07 PM
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