cerbera AJP stalling on tickover help needed teesside
Discussion
Hi all, my cerbera has decided it doesn't want to play. I've tried sweet talking but to no avail. Having just received the necessary leads to link ECU to my laptop and assuming I can get software to run is there anyone in Teesside with knowledge on how to make sense of readings. Unlimited mugs of tea and a willingness to learn are all I can offer as repayment.
Rusty, do you have a synchrometer to do the setup with? If not you'll need one or someone with one to do the setup. What you're trying to do is get the physical airflow to match the signal that the throttle pots send to the ECU to tell it what's happening. One of these is what you use to measure the air the engine is drawing in.
Steve.
Steve.
Thanks Steve, I haven't got one unfortunately. I'm no mechanic I while I don't mind buying one (is the the one your link takes you to the one I need?) I'm not confident I'll have the skill to sort it out on my own.
I've read a number of threads where people have tried (and often failed) to resolve this issue. What to do next? I'm as sick as a chip, the weather is fantastic and all I can do is stand and look at car in the garage.
I've read a number of threads where people have tried (and often failed) to resolve this issue. What to do next? I'm as sick as a chip, the weather is fantastic and all I can do is stand and look at car in the garage.
If you can keep the engine running just by keeping your foot gently on the peddle, then it sounds like the you just need wind the throttle stop out a bit. If you take the scuttle panel off (the engine cover by the windscreen, usually a 4mm allen key, two bolts drivers side and one on the passenger side, you'll need to disconnect the pipes to the windscreen wipers) then you'll see the throttle cable going into the engine bay and connecting to the arm on the drivers side. There will be a bar connecting this arm to a similar arm on the passenger side. Underneath the arm on the drivers side is a small bolt which takes an 8mm spanner, which the arm rests on when the throttle is closed. This is the throttle stop. You may find there is a gap between the arm and the stop in your case. This bolt is what should stop the throttles from closing completely, but in your case I think isn't. It sticks out proud of the plate it is screwed into and on the underside of the plate is an 8mm nut which is used to lock the bolt in place.
First of all you need to undo this lock nut slightly to allow you to adjust the stop. You need to turn the lock nut clockwise and you should feel it release as you turn it, you only need to turn it a fraction - say a quarter of a turn. Now you need to turn the bolt itself anti-clockwise. You'll need to pull the arm clear of the bolt as it is spring loaded to turn and shut the throttle as you lift off the pedal. Don't pull on the throttle cable to do this as you can put a kink it, use the bar between the two banks or one of the arms. They will rotate back towards you as you stand on the drivers side of the car. Wind the bolt out anti-clockwise until the arm rests on it when you gently close the throttle. Then repeat the process and wind the bolt out a further quarter turn anti-clockwise. Now start your car and see if the engine will idle now - you want to see around 1000 rpm on the gauge with the engine hot.
If the engine speed is below that then you need stop the engine and wind the stop out some more until it does. If the engine is cold, aim for say 900rpm as the engine speed will pick up as it gets hotter. If it's above this speed then you need to wind the bolt in clockwise and then again see if the idles at the right speed when you start it. Once the idle speed is right you need to lock the stop in place by turning the lock nut anti clockwise until you feel it grip. You don't want a huge amount of force here as it's a small bolt, just nip up lock nut. It's important that you make sure that the idle speed right and in particular not too high as you will lose engine braking when you lift off the throttle pedal. Replace the scuttle panel and then take the car out for a gentle drive and see how she feels to you. If the engine speed is right when you get back then just take the scuttle panel off and check that the lock nut is still tight. If the engine speed is too low or high then adjust.
If this sounds like too much, get some extra help, there may be someone in you local TVRCC region for instance. I'd take you some pics but my car is being painted at the moment. Once she's working ok, I'd take her to your local specialist/dealer and as said, get them to set the throttles up fully.
Good luck,
Steve.
First of all you need to undo this lock nut slightly to allow you to adjust the stop. You need to turn the lock nut clockwise and you should feel it release as you turn it, you only need to turn it a fraction - say a quarter of a turn. Now you need to turn the bolt itself anti-clockwise. You'll need to pull the arm clear of the bolt as it is spring loaded to turn and shut the throttle as you lift off the pedal. Don't pull on the throttle cable to do this as you can put a kink it, use the bar between the two banks or one of the arms. They will rotate back towards you as you stand on the drivers side of the car. Wind the bolt out anti-clockwise until the arm rests on it when you gently close the throttle. Then repeat the process and wind the bolt out a further quarter turn anti-clockwise. Now start your car and see if the engine will idle now - you want to see around 1000 rpm on the gauge with the engine hot.
If the engine speed is below that then you need stop the engine and wind the stop out some more until it does. If the engine is cold, aim for say 900rpm as the engine speed will pick up as it gets hotter. If it's above this speed then you need to wind the bolt in clockwise and then again see if the idles at the right speed when you start it. Once the idle speed is right you need to lock the stop in place by turning the lock nut anti clockwise until you feel it grip. You don't want a huge amount of force here as it's a small bolt, just nip up lock nut. It's important that you make sure that the idle speed right and in particular not too high as you will lose engine braking when you lift off the throttle pedal. Replace the scuttle panel and then take the car out for a gentle drive and see how she feels to you. If the engine speed is right when you get back then just take the scuttle panel off and check that the lock nut is still tight. If the engine speed is too low or high then adjust.
If this sounds like too much, get some extra help, there may be someone in you local TVRCC region for instance. I'd take you some pics but my car is being painted at the moment. Once she's working ok, I'd take her to your local specialist/dealer and as said, get them to set the throttles up fully.
Good luck,
Steve.
Edited by Steve_T on Sunday 18th May 08:23
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