Issues after fitting extractors to 4.0 six (AU)??? - Ford Forums - Mustang Forum, Ford Trucks, Ford Focus and Ford Cars

JC-XR8 · 04-29-2004, 05:20

Has anyone had any issues after fitting extractors to their 6 cyl cars?

Just thought I'd share mine:

EF Fairmont. Fitted Pacemakers, developed a miss the very next day.
Replaced O2 sensor - problem solved.

AU2 Forte Wagon (auto). Fitted pacemakers yesterday - developed a bad idle when pulling up to a set of lights (red). Revs dropped down to as low as 500rpm (in D) and then fluctuated between 450 and 600 rpm. The book says it should be around 750-800 rpm in N, and around 100 less in D with no a/c and wheels pointed straight (ie no load).
Fixed this by adjusting the idle control screw thingy on the Throttle Body - now idles as smooth as whatever you can think of that is smooth.

I had no issues after fitting pacemakers to the XR6 - except for a slight drop in power (1 rwkw), but this is offset by a nice fat torque curve between about 1800 and 4800 rpm.

mongrelEB · 04-29-2004, 06:58

Could just have been the computer learning on the AU?
As to the EF, it's not a common thing. The sensor was probably just old anyway, and changing it between manifolds must have killed it.

jonbays · 04-29-2004, 20:39

My AU auto I6 does a similar thing occasionally for a few seconds. I think it is the canister purge kicking in of its own accord and my idle is not the best to start with so it seems to upset it for a bit longer than the purge itself should take. I have adjusted my base idle speed so much I had o replace the stupid screw with a big phillips head screw and locknut. After all said and done though the ecu learned how to idle and I wound up backing it off to a stock base idle speed which in drive is a little rougher than a stock XR6 for most of the time. It never stalls though the IAC picks it back up just in time.

JC-XR8 · 04-29-2004, 20:59

guys - thanks for the info. It may just be the ECU learning, but the idle was scarily low, so i've bumped it up for the time being. If it ends up too fast, I'll back it off (like jonbays did).

jonbays - do you have any pictures of your car. The TS40 wagon intrigues me - I reckon it would look good, and is something I have contemplated, but lack of funds means no expensive body mods. Anyway, I'm going off-track in my own thread, but some pics of your wagon would be great.