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Author
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Topic: Hydrocarbons too high
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CHP2981
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Member # 9240
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posted
 
 
I went to a test only station and the hydrocarbons were too high. My mods are stock block and heads gt40 tubular bbk throttle body and spacer 24lb injectors aeromotive fpr bbk equals and h pipe with 2 cats msd 6al and msd dist with coil and last is a Paxton 1220sl with a 255 walbro fuel pump. Any ideas would be appreciated on how to bring them down. Most of the parts have OE carb # and I have 2 cats. Trying to do it legit.
[ August 15, 2010, 03:44 AM: Message edited by: CHP2981 ]
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No half steppin
Posts: 521 | From: Richmond | Registered: Jun 2009
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alexdel209
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Member # 9239
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posted
hydrocarbon is hac which is raw unburned fuel. adjust your fuel pressure reg if you can to get a lil less gass u should pass if still not then you need better cats and you will pas
Posts: 1087 | From: 209, ca | Registered: Jun 2009
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Sydewayz_Stan
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Member # 10217
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posted
+1 on the fuel pressure. disconnect the vacuum line to the fpr and adjust to 38-39 psi at idle then reconnect vacuum line. also make sure ignition system is good may not be complete combustion.
[ August 15, 2010, 04:33 AM: Message edited by: ajs91CHPcoupe ]
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-90 Vert-SOLD
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Posts: 3432 | From: 707 vallejo/richmond 510 | Registered: Aug 2010
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