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Old 21-04-14, 19:11   #1
skotvlct
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WTD: afm. Tps. AAC. ?

My Vl is idling rough and running like ****. Trying to figure out why? These are just a few things I can think of.
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Old 22-04-14, 09:46   #2
brussel
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what have you checked?

check all the "easy stuff" first.. plugs, leads, fuelpumps, fuel pressure
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Old 23-04-14, 12:26   #3
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Done all that. Just not fuel filter or fuel damper. The motor came from one vl to another. But was running fine before. The AAC is not plumbed into intake. It's blocked off. Does this matter?
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Old 23-04-14, 14:29   #4
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have you checked that everything is plugged in properly? the CAS plug is sometimes the culprit.
no idea about the AAC
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Old 23-04-14, 15:28   #5
skotvlct
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Yeh. But Cas usually dies when hot. I never had a Cas that would act like this before. It's the one big pipe from back of plenum to intake pipe before throttle body.
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Old 23-04-14, 19:00   #6
Steve
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Originally Posted by skotvlct View Post
Done all that. Just not fuel filter or fuel damper. The motor came from one vl to another. But was running fine before. The AAC is not plumbed into intake. It's blocked off. Does this matter?
Standard ECU and running AFM?
Hmmm, try plumbing it back into intake and see what happens...
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Old 23-04-14, 21:53   #7
bachig24u
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unplug the exhaust oxygen sensor. disconnect battery for 10 minutes or so and then reconnect battery with oxy sensor still disconnected.

let me know if it helps and we'll go the next step.
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Old 23-04-14, 22:50   #8
skotvlct
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Tried disconnecting O2 sensor. No good. I don't have anywhere to plum the pipe from AAC to intake. The person before has just blocked it off. It must have had cooler piping before. It the cooler on there. I need a standard intake pipe to try out really or something made up. I wish I kept all my old stuff now that through out a whole ago. I have checked all fuel. 36 on the malpassi. Got spark. Set afm to 3.55 volts.
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Old 24-04-14, 11:48   #9
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Checked timing? I chased a problem for ages presenting similar to yours did all the usual didn't solve it, in the end changed motors. When stripping for parts found the tensioner on the old timing belt wasn't holding tension and causing all my issues
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Old 24-04-14, 12:09   #10
bachig24u
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Any chance the fuel is really old?
The motor ran fine before moving it, so unless something isn't connected that was.

Disconnect one injector at a time and see if one doesn't make a difference when unplugged.
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