Idle problems on V8S but any rover V8 knowledge welcome.
Discussion
Hi
I've been having what I think I traced to overfuelling issues especially at start up for a while. Checked and Changed usual suspects and only fault or odd reading on Rover Gauge software was throttle pot. I change this and it seemed ok for a while. I even changed the ECU out for another working one during this process.
Then recently I've had trouble with starting and idling especially when can has been used and is up to operating temp. I used the Rover Gauge software to check the idle control valve and used it to retract it manually (i.e. overriding the ECUs control) to let more air in as an experiment. Its never idled and revved from cold better. So i thought its the valve. I buy a new one, install and reset ECU. It starts and idles fine so i think I've cracked it.
Then the last few weeks its been running terrible and on Tuesday (on way to important hospital appointment of course!) it stalled soon after starting and wouldn't restart. It may have flooded due to lack of air causing lack of ignition so I pulled injector impact sensor out, effectively cutting off the fuel and tried to start. It ran on the residue fuel and pressure for a few seconds then cut out as expected. I then pulled the idle control valve plug out (making it locked fully retracted to provide max air flow) and then it started first time. I ran like this for a bit but idle was at 2000rpm and then starting hunting all over the place. I plugged valve back in and rpm settled back at 950rpm ish which is good. After hospital I started it again and it was awful. Rpm at idle was about 400rpm and nearly stalling. I nursed it home with careful heel toe revving and braking with clutch.
Anyone had anything similar on their V8?
Thanks
Rob
I've been having what I think I traced to overfuelling issues especially at start up for a while. Checked and Changed usual suspects and only fault or odd reading on Rover Gauge software was throttle pot. I change this and it seemed ok for a while. I even changed the ECU out for another working one during this process.
Then recently I've had trouble with starting and idling especially when can has been used and is up to operating temp. I used the Rover Gauge software to check the idle control valve and used it to retract it manually (i.e. overriding the ECUs control) to let more air in as an experiment. Its never idled and revved from cold better. So i thought its the valve. I buy a new one, install and reset ECU. It starts and idles fine so i think I've cracked it.
Then the last few weeks its been running terrible and on Tuesday (on way to important hospital appointment of course!) it stalled soon after starting and wouldn't restart. It may have flooded due to lack of air causing lack of ignition so I pulled injector impact sensor out, effectively cutting off the fuel and tried to start. It ran on the residue fuel and pressure for a few seconds then cut out as expected. I then pulled the idle control valve plug out (making it locked fully retracted to provide max air flow) and then it started first time. I ran like this for a bit but idle was at 2000rpm and then starting hunting all over the place. I plugged valve back in and rpm settled back at 950rpm ish which is good. After hospital I started it again and it was awful. Rpm at idle was about 400rpm and nearly stalling. I nursed it home with careful heel toe revving and braking with clutch.
Anyone had anything similar on their V8?
Thanks
Rob
I didnt find it. 2 years of stalling, crap idle and one bank dropoping out I was almost at selling point. Not something ever mentioed by anyone - always stepper, leads, coil, amp etc so really pleased it was so simple.
TBH worth changing anyway - the middle of the cable was held by about 5 strands - guess you couldnt see it in situ easily.
FFG
TBH worth changing anyway - the middle of the cable was held by about 5 strands - guess you couldnt see it in situ easily.
FFG
gizzardio said:
So FFG, after all that time, that solved all those symptoms?
I can double check the earth connection. on mine there is a large earth coming down from the back of the alternator (hard to see) and attaches to the chassis directly below. Is this the one you're talking about?
It did. Not sure which one it is as I never found it.I can double check the earth connection. on mine there is a large earth coming down from the back of the alternator (hard to see) and attaches to the chassis directly below. Is this the one you're talking about?
Its about 40cm long as I still have the old earth strap which has a few strands left and is very green.
FFG
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