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4A-C Engines
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07-17-2005, 07:29 PM
Post: #1
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4A-C Engines
How many people here have a 4A-C powered AE86?
I've got a small annoying problem, Im not sure what it is exactly, when im driving and drop it into Neutral, ik usually get a "putt putt" noise. also when i rev the engine, its like Vroooooooooooooooomm putt putt. LOL Whats causing this? is it the carburator? Sniper ----------------------------- 1986 Toyota Corolla SR5 1989 BMW 535i 1986 Volvo 740 GLE ----------------------------- |
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07-18-2005, 09:43 AM
Post: #2
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4A-C Engines
Check (replace) all little vacuum hoses :-)
Lets check something - when you drive in traffic and put on gas pedal, then fully depress is - are there some delay of RPM fade ? |
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07-18-2005, 06:59 PM
Post: #3
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4A-C Engines
Where does the "putt putt" come from? The exhaust or the engine bay? Somewhere else?
Using: -98 Camry 3.0 V6 Abusing : -85 Corolla 2.0 GTi |
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07-18-2005, 07:43 PM
Post: #4
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4A-C Engines
Yeah when i rev the engine, it hangs for a maybe a second then goes down, the "put putt" come from the engine but the sound comes out the tail pipe, its not the exhaust, its all new pipes
Sniper ----------------------------- 1986 Toyota Corolla SR5 1989 BMW 535i 1986 Volvo 740 GLE ----------------------------- |
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07-18-2005, 07:48 PM
Post: #5
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4A-C Engines
I heard that this can be some ecological equipment. In order to prevent polutions - in described case. Look at your carburator - check vacuum hoses also, check ignition advance - but keep in mind that this may be normal behaviour in some cases.
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07-18-2005, 08:01 PM
Post: #6
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4A-C Engines
i had it also with my 4age but that was when the ignition was not correct.
Cars: "99 Lexus IS200 "86 AE86 Kouki Panda Levin GT-Apex (restore project) "84 AE86 Zenki Blue Levin (project racer) Motorcycles: "02 Yamaha R1 "02 Honda Hornet S "08 BMW R1200GS |
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07-18-2005, 10:23 PM
Post: #7
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4A-C Engines
Jaimemirror is on the right track.. I've had a couple of AE82's with this engine and I know they have a little vacuum diaphragm called a "dashpot" on the carb.
Pop the hood and remove the air cleaner so you can see the carburettor. Then start the engine and rev it by turning the throttle directly on the carburettor instead of pushing the pedal. When you let the throttle go, watch as the dashpot moves up and "catches" the throttle on its way down. As said, it is an emission control device that is supposed to make your emissions cleaner. Using: -98 Camry 3.0 V6 Abusing : -85 Corolla 2.0 GTi |
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07-19-2005, 05:41 AM
Post: #8
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4A-C Engines
If i understand correctly...is it normal? its not the engine or carb needing maintenence or needs to be replaced?
Sniper ----------------------------- 1986 Toyota Corolla SR5 1989 BMW 535i 1986 Volvo 740 GLE ----------------------------- |
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07-19-2005, 08:01 AM
Post: #9
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4A-C Engines
SniperGT Wrote:If i understand correctly...is it normal? its not the engine or carb needing maintenence or needs to be replaced?Yes, it can be normal. Just check hoses and ignition advance to be sure that everything is ok. |
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