2001AE112

Okay, I'll check out the ISCV too. Umm, where is the valve located on the 7AFE type engine? Thanks! Edit: found the location of the ICV, measured the resistance as 19.6 ohm (expected). I then disconnected the plug with the engine idling and the idle speed dropped but the engine still ran. So I'm thinking it could be dirty injectors? The engine has a definite shake to it every few seconds. I found some info on the ICV here: http://www.autozone.com/autozone/repairinfo/repairguide/repairGuideContent.jsp?pageId=0996b43f80380339

Cheers, and thanks for the fast responses. My mechanic suggested he could run a cleaner through the fuel injection system, similar to what Subaru do with the inlet manifold cleaning system. I've just sold a 2004 Suby Forester and I appreciate the carbon buildup problems in the 2.5L boxer engine... was a PITA having to get the mechanic to clean out the carbon buildup out every service... it would stop the pinging for a few weeks. I'll never buy a Suby again. Anyway, I'll have a look at the Corolla's inlet body, as it sounds it might require a clean out 'somewhere' in there. If nothing stands out I'll get my mech to clean the air/fuel system out.... just trying to keep the cost of ownership down! Why I buy Rolly's!

Hi, New member here. Owned many Corollas and they were very reliable, but my 2001 AE112 Ascent is suffering at present. Purchased in 2007 with 93k km, it's now done 135k km and has been great so far. A few weeks ago the idle became a bit rough. With the engine warm, at idle, there is a hiccup in the idle every 5 seconds or thereabouts. The idle was previously very smooth. The plugs were changed 10,000 kms ago. My new mechanic suggested some new ignition leads, so the 10 y.o. Sumitomo leads were replaced with blue silicone NGK leads which he sourced for me, and they didn't improve anything. Since the rough idle came in, the car suffers from a lack of power (-10%) at launch (manual trans.) and the car lurches once after about 1-2 minutes after I drive off to work in the morning from a cold start. I high road speed, the problem is undetctable. IIRC, the lurching was detected before the rough idle problem came about. I've since run 98 RON through it, which has made no difference, albeit a little more power, but still lacking where it used ot be. So I'm thinking: 1) Spark plugs may be poor quality, 2) Dirty injectors 3) Not the fuel filter (checked 3,000 km ago) 4) Sensor(s)? Appreciate some thoughts Mike :)