ghostridersa
28th January, 2013, 09:42 AM
Good day members of DK
I hope that some of the members can help with this strange problem. Vehicle is a Opel Meriva z16xe, 2004/2005 model. It came to me from the agents/dealer. Problem was a misfire on the engine. Dealer fitted a new coil pack and misfire still there. They checked it for 1 week before they told the customer they suspect it has internal engine problem and they would have to strip engine and check. But at the same time referred the customer to me.
Vehicle arrived at my shop. Checked new plugs fitted by agents, compression is 14 bar on all 4 cylinders, coil pack is new dealer part, fuel pressure is perfect, carried out cylinder leak-down test and cylinders hold their pressure. All meaning that there can not be any internal engine problems the agents are referring too. ( As it has a long coil pack supplying spark we extended it with boggi leads so we can do the wire removal trick to check which cylinders are misfiring. 1 and 4 are misfiring and all plugs burning rich).
Scanned the vehicle and came up with the following fault codes:
Total number of fault codes: 4
P0351 - Ignition 1 Control Circuit
(00) - Not present
P0352 - Ignition 2 Control Circuit
(00) - Not present
P0353 - Ignition 3 Control Circuit
(00) - Not present
P0354 - Ignition 4 Control Circuit
(00) - Not present
Cleared fault codes, started vehicle and engine ran perfect for 30 seconds without misfire then began to misfire for 10 seconds and then cut off. Scanned vehicle and no more fault codes. Started vehicle and no misfire for 30 seconds and again started to misfire for 10 seconds and cuts out. Checked all wiring and all seems ok but can not understand how and why the vehicle misfires but does not have anymore fault codes. Checked compression again and it is perfect. Can any members maybe throw some light on this problem?
Many thanks in advance
I hope that some of the members can help with this strange problem. Vehicle is a Opel Meriva z16xe, 2004/2005 model. It came to me from the agents/dealer. Problem was a misfire on the engine. Dealer fitted a new coil pack and misfire still there. They checked it for 1 week before they told the customer they suspect it has internal engine problem and they would have to strip engine and check. But at the same time referred the customer to me.
Vehicle arrived at my shop. Checked new plugs fitted by agents, compression is 14 bar on all 4 cylinders, coil pack is new dealer part, fuel pressure is perfect, carried out cylinder leak-down test and cylinders hold their pressure. All meaning that there can not be any internal engine problems the agents are referring too. ( As it has a long coil pack supplying spark we extended it with boggi leads so we can do the wire removal trick to check which cylinders are misfiring. 1 and 4 are misfiring and all plugs burning rich).
Scanned the vehicle and came up with the following fault codes:
Total number of fault codes: 4
P0351 - Ignition 1 Control Circuit
(00) - Not present
P0352 - Ignition 2 Control Circuit
(00) - Not present
P0353 - Ignition 3 Control Circuit
(00) - Not present
P0354 - Ignition 4 Control Circuit
(00) - Not present
Cleared fault codes, started vehicle and engine ran perfect for 30 seconds without misfire then began to misfire for 10 seconds and then cut off. Scanned vehicle and no more fault codes. Started vehicle and no misfire for 30 seconds and again started to misfire for 10 seconds and cuts out. Checked all wiring and all seems ok but can not understand how and why the vehicle misfires but does not have anymore fault codes. Checked compression again and it is perfect. Can any members maybe throw some light on this problem?
Many thanks in advance