Wishing I hadn't bought this... misfire and major issues

Hi guys. So went into the garage in the end. They managed to make two good cams from my old and the above and installed those plus a new chain. Oil pump replaced as well so now runs quietly once again. However still throwing code for camshaft sensor and sluggish until the turbo kicks in. Still poor starting too. Will check tdc and cam position tomorrow to see if its out of time at all. Other than that we are all out of ideas
 
Spacecowboy said:
Hi guys. So went into the garage in the end. They managed to make two good cams from my old and the above and installed those plus a new chain. Oil pump replaced as well so now runs quietly once again. However still throwing code for camshaft sensor and sluggish until the turbo kicks in. Still poor starting too. Will check tdc and cam position tomorrow to see if its out of time at all. Other than that we are all out of ideas
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hello it sounds like you are getting there, just a few bits to sort out but stick with it because with what you say it is not too far away, it sounds fro where you purchased it someone else has had a go at it and totally made a hash of it hense when you unknowingly purchased it you got the problems. Someone is going to come in and say what to do next to finally sorting out once and for all, your patience has my admiration well done mate.
 
Cheers chap. I didn't bank on it being quite this much work but I've learned a bunch along the way. Plus the garage has been quite reasonable moneywise so still under budget on the entire car
 
I read on a forum recently, I can't remember where but there were a lot of problems and it was caused by the cam sensor connector and the thermostat connector being on the wrong ones, i.e. cam sensor was connected to the thermostat and the thermostat to the cam sensor. It's a long shot but try switching them , nothing to lose and everything to gain.
 
QuattroCalum said:
I read on a forum recently, I can't remember where but there were a lot of problems and it was caused by the cam sensor connector and the thermostat connector being on the wrong ones, i.e. cam sensor was connected to the thermostat and the thermostat to the cam sensor. It's a long shot but try switching them , nothing to lose and everything to gain.
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Hi yes I read the same post. Something about the AIT being connected to the MAP or something like that. Not sure where about the thermostat/AIT is?
 
QuattroCalum said:
Did your cam timing check out?
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Hi so checked for crossed wires and that all checks out. Mechanical cam timing, crank timing and timing on the chains look spot on. All the mechanic can think of next is dodgy wiring or ecu is at fault. He is going to do live data logging to see what the sensor is actually throwing out
 
Looks like the ecu may be ******. Is it better to buy a cheap unit from ebay (they all seem cheap) or send mibe away to be repaired by for example AC Limited?
 
Spacecowboy said:
Looks like the ecu may be ******. Is it better to buy a cheap unit from ebay (they all seem cheap) or send mibe away to be repaired by for example AC Limited?
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hello at the end of the day you have now checked everything and all is ok, so surely a elctrical enginge can check it out for firing sequence and such and there must be a second hand ecu of a srcapper, anyway sounds like you are not far off, best wishes for the coming festive season from Colin
 
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Have you scanned again for codes and is that the only one coming up. Not convinced it's the ECU at fault generally when they go the engine won't run and they won't communicate with diagnostics.
 
This one is a long shot, when you removed the cam pulley did it go on the same way? It's possible to put the pulley on backwards and there is a timing mark on the other side that's around three teeth out!
 
QuattroCalum said:
This one is a long shot, when you removed the cam pulley did it go on the same way? It's possible to put the pulley on backwards and there is a timing mark on the other side that's around three teeth out!
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When the camshaft sensor fault originally appeared the cam pulley had not been removed. The specialist has swapped out the cams since and the fault has remained. Each time its scanned the camshaft sensor fault shows up. We can clear it, take it for a drive and it reappears as soon as you switch off and on again. Its very strange. Power is super down. No idea what else it could be. No data is coming out of it/being receieved according to their live data logs
 
Spacecowboy said:
When the camshaft sensor fault originally appeared the cam pulley had not been removed. The specialist has swapped out the cams since and the fault has remained. Each time its scanned the camshaft sensor fault shows up. We can clear it, take it for a drive and it reappears as soon as you switch off and on again. Its very strange. Power is super down. No idea what else it could be. No data is coming out of it/being receieved according to their live data logs
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have you ever thought about putting it on a rolling road and surely the diagnosis will show up what the engine is doing, just a thought or may be you have already been there, cheers from Colin
 
Spacecowboy said:
When the camshaft sensor fault originally appeared the cam pulley had not been removed. The specialist has swapped out the cams since and the fault has remained. Each time its scanned the camshaft sensor fault shows up. We can clear it, take it for a drive and it reappears as soon as you switch off and on again. Its very strange. Power is super down. No idea what else it could be. No data is coming out of it/being receieved according to their live data logs
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Something is definitely wrong, the fault should be logged as soon as the engine has been started, not once it has been run then switched off and on again. In this statement (Hall effect camshaft position sensors typically have three terminals; one for current feed, one for ground and one for the output signal)

Three wires, live, earth, signal. The specialist said "No live data is coming out of it?being received" If that were the case, there would be no spark and the engine wouldn't run.

On many engines with distributorless ignition systems and sequential fuel injection, a camshaft position sensor is used to keep the engine's control module informed about the position of the camshaft relative to the crankshaft. By monitoring cam position (which allows the control module to determine when the intake and exhaust valves are opening and closing), the control module can use the cam position sensor's input along with that from the crankshaft position sensor to determine which cylinder in the engine's firing sequence is approaching top dead center. This information is then used by the engine control module to synchronize the pulsing of sequential fuel injectors so they match the firing order of the engine. On some applications, input from the camshaft position sensor is also required for ignition timing.
 
QuattroCalum said:
Something is definitely wrong, the fault should be logged as soon as the engine has been started, not once it has been run then switched off and on again. In this statement (Hall effect camshaft position sensors typically have three terminals; one for current feed, one for ground and one for the output signal)

Three wires, live, earth, signal. The specialist said "No live data is coming out of it?being received" If that were the case, there would be no spark and the engine wouldn't run.

On many engines with distributorless ignition systems and sequential fuel injection, a camshaft position sensor is used to keep the engine's control module informed about the position of the camshaft relative to the crankshaft. By monitoring cam position (which allows the control module to determine when the intake and exhaust valves are opening and closing), the control module can use the cam position sensor's input along with that from the crankshaft position sensor to determine which cylinder in the engine's firing sequence is approaching top dead center. This information is then used by the engine control module to synchronize the pulsing of sequential fuel injectors so they match the firing order of the engine. On some applications, input from the camshaft position sensor is also required for ignition timing.
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bring back the days of a dizzy cap and the carburettor eh, had a vauxhaul vx490 with twin carbs and you could do something without the technical, mind you times have moved forward and I have not kept up so my knowledge is silch, cheers from Colin
 
cam to cam timing incorrect, it gives an open signal fault as it cannot gain a reference when its looking at the sensor output
 
Broken Byzan said:
cam to cam timing incorrect, it gives an open signal fault as it cannot gain a reference when its looking at the sensor output
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Are you saying that the camshafts are still not quite right I.e not in sync with each other as they should be?
 
If that is the case then would it be a safe hypothesis that it is the inlet cam at fault as a) that's where the cam sensor takes its read and b) the timing mark on the cam pulley is spot on?
 
Anyone got a photo of the cams set at tdc and what position the cam hall sensor pick up (if you get what I mean) is in?
 
pop the cam sensor off and set tdc on the exhaust cam/timing mark. The disc on the inlet cam should be sat with the top edge of the larger slot being level with the top head face, assuming the tensioner is jacked up fully
 
Try starting the car, with the engine running disconnect the cam position sensor, this should result in the engine cutting out and a fault recorded for cam position sensor, open circuit this will at least verify that the ECU is receiving a signal and the cam position sensor is working.
What make is the cam chain tensioner that you fitted and do you still have the original?
 
audi upgrades
I installed one bought from ebay Germany. A reputable seller. When we operated it with the valve cover off, to check for oil lubrication, it appeared to operate correctly?
 
QuattroCalum said:
Try starting the car, with the engine running disconnect the cam position sensor, this should result in the engine cutting out and a fault recorded for cam position sensor, open circuit this will at least verify that the ECU is receiving a signal and the cam position sensor is working.
What make is the cam chain tensioner that you fitted and do you still have the original?
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From memory I did try this and it stalled. I threw the old one away last month unfortunately. I kinda wish I hadn't now though...
 
Some news today. Apparently she is finally running right. Auto elec said it was a bad connection to the ecu but as soon as that was sorted she ran right. Sound right?
 
Excellent news mate, you'll be glad that it's all sorted now you can enjoy driving it.
 
Just picked her up and yes she is all fixed. Apparently the auto electrician found a few duff connections to the ecu which were the cause of a few odd things from the starting cam sensor fault to the mooing fuel pump. That's as quiet as a mouse now. So all in the car stands me 789 inc purchase rice and parts and the labour I've just paid out to the garage. Not quite the bargain I hoped it would be but still under budget. Just for discs and pass to replace now lol

Thanks to everyone here for their help, advice and time. I've learned a bunch (inc how to change a cam belt myself) and what not to do.
 
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Spacecowboy said:
Just picked her up and yes she is all fixed. Apparently the auto electrician found a few duff connections to the ecu which were the cause of a few odd things from the starting cam sensor fault to the mooing fuel pump. That's as quiet as a mouse now. So all in the car stands me 789 inc purchase rice and parts and the labour I've just paid out to the garage. Not quite the bargain I hoped it would be but still under budget. Just for discs and pass to replace now lol

Thanks to everyone here for their help, advice and time. I've learned a bunch (inc how to change a cam belt myself) and what not to do.
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brilliant mate good news and glad you stuck with it when many would have given up, Merry Christmas to you and your family and all the best for the New Year from Colin
 
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