bank dropping out (again) and over revving
Discussion
Went to Tenby at the weekend and the car started dropping a bank of injectors again which I thought had been resolved by the work that had been done on the car over the last 12 months. It happened twice but there is no warning or no particular condition when it happens but hasn't happened under hard acceleration yet so hasn't caused any dangerous situations. The power just goes, in fact you cant accelerate but slow down. It kicks neat fuel out the back and the exhaust noise changes dramatically to sound like a rough tractor.
If I turn the engine off and restart its OK again. Was told to look at the earths but not so sure as why would it rest itself? Any suggestions?
Also got an issue when accelerating, mainly when overtaking so want full power. The engine revs rise higher than the speed I'm doing but cant fatham out why this would be. Only noticed it over this weekend and seems to have happened since the tyres were changed (to R1R's) but cant see this having an impact. Again, any ideas?
I just want to be able to go out, at least once, when I don't have any problems.
FFG
If I turn the engine off and restart its OK again. Was told to look at the earths but not so sure as why would it rest itself? Any suggestions?
Also got an issue when accelerating, mainly when overtaking so want full power. The engine revs rise higher than the speed I'm doing but cant fatham out why this would be. Only noticed it over this weekend and seems to have happened since the tyres were changed (to R1R's) but cant see this having an impact. Again, any ideas?
I just want to be able to go out, at least once, when I don't have any problems.
FFG
carsy said:
ecu or loom fault assuming your spark is ok.
And yes clutch. It will slip more in the higher gears 4th/5th.
ECU has been changed and still have the fault so must be wiring somewhere. It goes really well other than when this happens. Best to replace the whole engine loom or just patch it up? If patching what is best to replace first? And yes clutch. It will slip more in the higher gears 4th/5th.
FFG
rigga said:
I'm gonna say as its the mans choice Griff and not the girly chimaera, revs rising is wheelspin 
Tho in reality yes its a clutch fault.
R1R's on now - no wheel spin. The island near home is great for screeching around (in any car) but couldn't even get a squeal out of them yesterday.Tho in reality yes its a clutch fault.
FFG
Loubaruch said:
Check the pins in your ECU plug, I had an identical fault and one of the pins had worked loose probably due to yanking the ECU out to tidy up the rats nest. There is very little play on the ECU loom so any movement puts pressure on the plug. Form the rear of the engine looking forward: Pin 11 left bank of injectors, pin 13 Right bank. Worth a try!
Thanks. Will have a look. Its a real PITA when it happens as there is no pattern. Just glad it seems to happen in non dangerous situations.Didn't fancy changing the loom so this looks like a potential solution.
FFG
cureton said:
Are you really sure a complete bank is dropping out? I had exactly the same symptons, at no specific condition engine felt it has lost half of its power, still idling but almost no acceleration. Ignition off, restart and all fine. After ECUmate indicated road speed sensor fault it turned out the cable on the speed sensor near the diff was loose, fitted new connector and all fine.
Not exactly but its chucking what smells like neat fuel out the back end. It does idle but wont accelerate and sounds as rough as fook if you put your foot on the gas.Did about 450 miles at the weekend and it happened twice, and hadn't happened in the previous 300ish miles, so difficult to replicate.
Will check this though as its a significantly cheaper fix than changing the engine loom.
FFG
It did it after dropping down a hill so just in gear but no gas applied and went around the corner at the bottom and it went - luckily only 20 yards from the car park we were going into. The other time was just cruising about 45mph and went to accelerate and gone again so just pulled over on the side of the road.
There were 5 cars on the run so some spirited overtaking and driving in places so thankful it didn't happen then.
Hope its as simple as speed sensor wiring/connection.
FFG
There were 5 cars on the run so some spirited overtaking and driving in places so thankful it didn't happen then.
Hope its as simple as speed sensor wiring/connection.
FFG
Could well be. Its so intermittent I cant replicate it so will just check the earthing from the injectors. Hope its the o/s not the n/s.
From memory the o/s wires come out each injector, join near the injector and head directly back towards the bulkhead and not near the coil but i'll check. They then disappear behind the engine somewhere.
Its a 430 BTW not a 500 although a miox of wiring (500 and precat and some other bits due to being press/factory car). 250k miles isn't going to be an advantage either.
FFG
From memory the o/s wires come out each injector, join near the injector and head directly back towards the bulkhead and not near the coil but i'll check. They then disappear behind the engine somewhere.
Its a 430 BTW not a 500 although a miox of wiring (500 and precat and some other bits due to being press/factory car). 250k miles isn't going to be an advantage either.
FFG
Adrian@ said:
If it is flooding one bank of the engine, then a set of clamp on temperature sensors would read exhaust pipe temp and 'see' it....which I have... for when we were reading exhaust temps on my turbo along side the RPM related supplementary fuel injection system from last century.
LOL
Adrian@
I bought a remote temp sensor after the Growl so could do this but not sure what you mean I need to try?LOL
Adrian@
RPM doesn't seem to be affected.
FFG
Adrian@ said:
Sadly the manifold joins at the main two into one...(OR remind me if that system does not) and even then 4 tail pipes will confuse your nose. LOL
Adrian@
Correct, so no use whatsoever then.Adrian@
It smells out eh back so must be one side or the other.
I'll try the speed transducer wiring and have a look at the wiring to the injectors but after that its down to the experts.
FFG
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