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« on: 06 June 2011, 22:31:52 »
Hi
Sorry this is long winded but having already spent a grand on my Omega so far this year only to now be told it needs a new ECU, I thought I'd list what's gone on in case anybody has experienced the similar and it's not the ECU.
Rough idling for around 3 months. Got really bad about a month ago with car revving by itself before spluttering to a stall. Local garage diagnosed leaking manifold. Day before I was taking it in , I went to start her up but battery was dead. Had sat idle for 3 weeks. Jump started her but had no throttle whatsoever. AA man had to follow me to the garage at 5mph on the pull of the auto alone. Garage fitted new manifold, new throttle potentiometer but brought up the following list of codes:-
P0170 - 02 SENSOR
P1700 - MIL REQUES FROM TRANSMISSION MODULE
P1120 - ACCEL PEDAL SENSOR 1
P1122 - ACCEL PEDAL SENSOR 2
P1150 - LIMP HOME
P1525 LIMP HOME POSS ERROR
P0304 - CYLINDER 4 MISFIRE
P0120 - THROTTLE PEDAL POSITION SENSOR/SWITCH A CIRCUIT.
The garage suggested I get it into a VX dealer for their Tech 2 to diagnose. This I did. Their report is as follows:-
INVESTIGATED EML ON/ROUGH IDLE
TECH 2 TESTED, FOUND PRESENT CODES - P1700 SVS
REQUEST VIA CAN AND P0304 CYLINDER 4 MISFIRE DETECTED
CHECKED DATALIST
CARRIED OUT COMPRESSION TEST (ALL CYLIINDERS 180 PSI)
ACTUATOR TESTED, COIL PACK
CHECKED FOR AIR LEAKS. FOUND LEAK FROM INTAKE MANIFOLD, REQUIRES NEW GASKET.
RAN THROUGH CHECKING PROCEDURES FOR CODE 1700. CHECKS GO STRAIGHT TO REPLACEMENT OF ENGINE ECU REQUIRED.
SUGGEST REPLACE MANIFOLD GASKET AND GO FROM THERE
VHC 0.3
I had the intake manifold gasket replaced today, only to be told there wasn't a problem with the old one. Undriveable still and now the total loss of throttle response has returned with the car holding itself at over 1200 rpm after starting.
EGR valve was blanked off a few weeks back to see if that helped but didn't. Brand new plugs. Thoroughly cleaned throttle body and breather pipes and new throttle body gasket fitted.
I just can't afford to replace the ECU at the £800 quoted so I'm asking if anybody has any idea if there can be anything causing all this other than the ECU.
Thanks for any help.