17 replies to this topic

[Willsy]

I recently had my cylinder head and timing chain changed on my 2.2 due to coolant loss from a spark plug well when I tested the car to make sure everything was ok the accelerator pedal becomes unresponsive and the idle becomes really rough, after turning the engine off and back on it runs smooth again until the accelerator pedal becomes unresponsive. It seems ok until the engine heats up to about 100 degrees then when i rev it past 3/4000 revs the accelerator becomes unresponsive. The fault codes I have are p1514, p0378 and c3f00. I have cleaned the loom of doom connectors but still no joy any help would be much appreciated, cheers

[smiley]

0378 could be post cat lambda connector plugged in wrong socket.

Was the cat section removed during the maintenance job?

 

1514 has been reported against:
- Scangauge set to show more then 3 values.
- Faulty injector
- Faulty map sensor.
- Leak in inlet manifold.

 

[Willsy]

I don’t think so mate tbh as they done the work with the rear clam still on the car I’m presuming the post cat connector is underneath the boot? Would the map sensor and injectors have been messed with while changing the head? I know the inlet manifold would as somebody has already mentioned to get that checked for leaks. Cheers

[VX220BOB]

When I had my 220NA I experienced the same thing and if I recall the earth wire on the engines ECU loose or it was the earth strip connection in the coil pack cover to end of the cylinder head. P/no 93178655 to fixing 11519788 on the cyl head.

[Willsy]

Ok mate will check these connections then thanks for your help

[vocky]

It's possible they disturbed the ECU connectors during the work, some cars get some corrosion in the plugs and the pins can break off. (quite rare)

 

P0378 Timing Reference High Resolution Signal B Intermittent/Erratic Pulses - Coilpack, Crank sensor or possibly Cam timing (coilpack is quite common), as above check earth strap on cam cover

 

P1514 Airflow to TP Sensor Correlation High - could be MAP sensor, ECU pins or Throttle Body

[Willsy]

Ok mate thanks for your help they must of disturbed something as it was fine apart from the coolant loss through the spark plug well before they changed the head, will check the earth cable but where are the ecu connectors? Tbf the car has been garaged for the last 10 years so I wouldn’t of thought they would have corroded but will check them also. Cheers

[vocky]

also worth checking the throttle body connection

[Willsy]

I did check the throttle body connection as somebody mentioned it on fb it seems tight but will try cleaning it see if it helps. Thanks again

[vocky]

you need to unplug the connectors and spray them with electrical contact cleaner

 

Also worth mentioning that the MAP sensor needs checking and a faulty MAP sensor can cause the issues you have too

[Willsy]

Sound mate I got some to clean the LOD connectors Sunday so will give it a bash. Thanks a lot for your help it’s much appreciated

[FLD]

I'd double check the LOD plugs. With them separated look in and remove the yellow mesh. Check the female terminal as these have an internal spring part. I had awful trouble with mine for this reason and it took me ages to pin down. The wires apply leverage to the male terminal and it levers back the spring part. Over time the spring weakens and it stays back giving a poor connection. You can prise it back with a pin to close the gap but its temporary. I found it was particularly bad on the thick pink/brown wire on one corner. New terminals are available from vehicle wiring products though. Also worth checking that the plug is fully home. They are a slag to close fully so check the latch part has gone over.

TB plug is also another known problem as mentioned. Earths on the ECU, and head could also have been disturbed giving poor connections.

Where in the west mids are you? I'm near Nantwich and there's a few of us in the area who may be able to help if you're really stuck.

[Willsy]

Ok mate I’ll double check the loom connectors tbf though it was running fine until the head was changed so I’m presuming it’s something they have messed with would they have disconnected the loom behind the coolant tank? I’m from Wednesbury by Walsall mate if there is somebody local that wouldn’t mind as I’m not very mechanical minded, I can build a house start to finish but no idea when it comes to engines lol thanks for your help bud

[FLD]

It was the parked up for 10years that triggered that thought. The LOD fault is so erratic it can come and go being a real pain. This could have been there before any messing although I agree with the potential link. Electrical faults are a pain to fix.

[Willsy]

It’s been off the road for 6 years mate but been garaged for 10 years so maybe it’s giving me the middle finger for not driving it for so long you can say that again mate it’s frying my brain already

[FLD]

Yeah, I know what it's like.  Took me 3 months to find the dodgy terminals which is why I always mention checking them to people with similar problems.  Keep at it, you'll get there.

[Willsy]

Cheers mate I’ll keep poking and prodding things I’m sure I’ll get there eventually lol

[Willsy]

Hi guys just a quick update took the car back to the garage that done the work, they said the throttle body was full of dust and crap which was stopping the flap from closing properly, since they have cleaned it out the problem hasn’t occurred so hopefully it’s all sorted and can start enjoying it again hope this can help other people that get these error codes and thanks to everyone for their help