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« on: 19 July 2014, 18:52:15 »
New (to me) 95k miles V6 2.5. V cheap due to problems dealer couldn't/wouldn't fix. All done now, or easily doable, except this puzzler.
The engine idles poorly when warm. Ok for 5-30 secs, then stumbles and revs back to idle. Does not stall. (Air Con is OFF)
Runs v smoothly when driven grandpa style. Begins to hesitate and fails to deliver power if throttle used more heavily. Will revert to smooth after a couple of minutes more grandpa driving.
Engine bay pretty clean. No smoke or steam. Oil and water fine. No undue hissing when running. No obvious cracked tubes etc. Tappets mildly noisy. Temp indicator hovers around 80-90 mark, never red.
Paperclip test shows code #135 ("Telltale (Checklight) Voltage Low"). All instruments work fine, but I have seen a Brake Light warning, and the Level warning is on (needs linkage fix I believe). I suspect the #135 is not relevant to the engine issue.
I've read a fair bit about MAF sensors, lambda, ICV etc, but I'd like to know if anyone has a specific idea about these type of symptoms before I get elbows deep into a new (to me) engine bay.
Many thanks.
