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Prelude stalling problem (picture and movie included !) - need help locating some engine components
Great news! I got the exhaust centre section replaced (coroded) and
while I was there I asked the garage to replace the main fuel relay because I also had an intermittent restart problem (once in a while after stopping the engine to pop into a shop it wouldn't restart for about a minute). Now my rough idle, intermittent stall and intermittent restart problems are all gone ! Dont know if it was the exhaust or main relay that fixed it. Hope this helps someone else out ! Chris wrote: > I've had a stalling problem for the past year on my '93 Prelude Si > VTEC. > It idles rough and sometimes stalls when warm and the revs drop > (typically when stopping for traffic lights). > The distributor recently failed and I was gutted that a replacement > didn't help me with the stalling problem. > > So, from searching the web I reckon it might be the Idle Air Control > (IAC) valve (aka EACV Electronic Air Control Valve). > > Can someone please tell me from this photo where this component is > located? > http://63.218.54.74/prelude/airvalves.jpg (200KB) > > I've placed a red X where I think it is located. > Also, where is the fast idle control valve ? > > While we're at it, is the EGR valve where I've marked EGR??? ? > And, finally what is the black think where I've written "What is this > ?" > > > In case anyone is interested in helping me further, this link points > to a > movie of the rough idle. > > http://63.218.54.74/prelude/roughidle.mpg (2MB) > > I increase the revs 3 times > 1. Initially the fan is on so it's quite noisy (ignore this one). > 2. Fan stops and noise level drops. I pull throttle chord again, > engine runs ok. > 3. I pull throttle chord the third time, idle drops very low and > engine almost stalls, then revs pick up to normal again. When on the > road it sometimes actually stalls (a few times a week). There is also > a rattle, this is coming from a vibrating heat sheild. > > > Notes: > There is one ECU code (code 12 - EGR lift valve). Local dealer has > checked vacuum and thinks it might be a bad ECU or bad wiring but > hasn't been able to find out for sure. > Local dealer hasn't been able to successfully diagnose the stalling > problem and after 2 visits has sent me home with a new battery and > distributor (which had failed). |
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Chris wrote:
> because I also had an intermittent restart problem (once in a while > after stopping the engine to pop into a shop it wouldn't restart for > about a minute). sounds like the main relay, yes? |
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