We can check the other faults, but reading the links Gary sent sound promising too.
The talk about the power steering switch needing to be a closed circuit is useful as that'll drop the revs by 100rpm. The most likely source could be the Throttle Position Sensor (TPS) as this has caused similar faults on these forums, but it doesn't explain why disconnecting the ISCV improves things. Geoff will also have to make sure that the vehicle speed sensor has clean contacts. How do you read faults on these ECUs, as they have a large connector that is the interface and I assume that's where you get the fault code from. Regards, Steve -- www.h4-turbo.co.uk www.quantumowners.co.uk www.quantumcars.co.uk www.quantumheritage.co.uk On Tuesday 01 Jun 2010, Jim Hearne wrote: > Sorry, have you checked for fault codes ? > > Jim > > On 01/06/2010 12:29, Steve Kodz wrote: > > We're getting a very bad idle with the Zetec in Carole's 2+2. With the > > idle speed control valve connected from cold it will idle nicely at > > around 1000rpm, if just left to idle and warm through. However if you > > rev, or drive that car the best idle to can get is between 2-3,000 > > rpm, which isn't great :( The car also drives badly, having > > hesitation and then you fight the engine on the over run. > > > > It is a lot better with the ISCV disconnected, but still not great. > > The idle is still a bit high, being around 1,200 rpm and it still > > doesn't drive that great. > > > > We've tried resetting the ECU to re-program it and Geoff's cleaned all > > the electrical contact and the ISCV. Any ideas what else needs to be > > done to get this ready before the HHII? > > > > Regards, > > Steve > > -- > > www.h4-turbo.co.uk > > www.quantumowners.co.uk > > www.quantumcars.co.uk > > www.quantumheritage.co.uk -- You received this message because you are subscribed to the Google Groups "Quantum Owners Group" group. To post to this group, send email to quantumowners@googlegroups.com To unsubscribe from this group, send email to quantumowners-unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/quantumowners?hl=en IMPORTANT NOTE: All information presented herewith is provided on an "As Is" basis, without warranty or the implication thereof. Neither the Quantum Owners Club nor the individuals associated with the Quantum Owners Club or in the preparation of the above information shall have any liability to any person or entity with respect to liability, loss, or damage caused or alleged to be caused directly or indirectly by the instructions contained within this or related message(s).
