Bypassed heater core, now rough idle-->normal idle and SES
04-04-2008, 09:27 PM
#1
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Bypassed heater core, now rough idle-->normal idle and SES
year:1992
Model: Camaro RS
Motor: 305TBI
100% stock
So ive got a leaky heater core, so after talking with my dad we decided to bypass the heater core [used a connector to splice the in/output hoses together] got everything cleaned up and started it.
...
sounds like its cammed for the first 3-4 seconds, and then jumps to 8-1000 steady and throws a SES. drives fine, no loss of power, nothing out of the ordinary, but throws a SES... shorted out the pins to throw it into diagnostic mode, and it throws code 12.
checked all the vacuum lines i could find, one @ the heater valve got unhooked, hooked it back up, same thing.
im guessing im overlooking something, since this is my first V8, and definatly my first pushrod motor, and first TBI.
ill grab a sound clip tomorrow, my neighbors are hella pissed at me as it is.
Model: Camaro RS
Motor: 305TBI
100% stock
So ive got a leaky heater core, so after talking with my dad we decided to bypass the heater core [used a connector to splice the in/output hoses together] got everything cleaned up and started it.
...
sounds like its cammed for the first 3-4 seconds, and then jumps to 8-1000 steady and throws a SES. drives fine, no loss of power, nothing out of the ordinary, but throws a SES... shorted out the pins to throw it into diagnostic mode, and it throws code 12.
checked all the vacuum lines i could find, one @ the heater valve got unhooked, hooked it back up, same thing.
im guessing im overlooking something, since this is my first V8, and definatly my first pushrod motor, and first TBI.
ill grab a sound clip tomorrow, my neighbors are hella pissed at me as it is.
04-05-2008, 01:31 AM
#2
Senior Member
Re: Bypassed heater core, now rough idle-->normal idle and SES
well, this is random, but I know the brn/tan single wire used for timing is kind of in that area. Make sure you didnt damage/cut/break it somehow when working in the area. Maybe leaning on it or somethiing broke it??? Your rough idle problem sounds like the EXACT behavior when that wire is disconnected when I'm setting my base timing.
04-05-2008, 08:19 PM
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Re: Bypassed heater core, now rough idle-->normal idle and SES
EST wire was hooked up, unhooked it and it ran a touch rougher, every single connection and hose i could find was hooked up.
any other ideas?
any other ideas?
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