Can egr cause misfire?
- Thread starter Juicy
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My personal experience with the EGR valve is that it doesn't misfire during normal driving. It is recurring at idle however. I would check your spark plugs and HT leads also check the connection at your dis module to see if they have popped off.
OK your misfire is on Cylinder1 p0301 there is a injector circuit fault in electrical circuit on cylinder 1 p0201 and secondary air injector system pump relay circuit is open. I would check the connection to your injectors this is where the issue is. From memory cylinder 1 is the one nearest the drivers side. The connection will be loose causing the misfire.
No your injectors are at the rear of the engine. They are a plastic rail with 4 electrical connection. It is either been pulled out or broken by accident when fitting your spark plugs and leads. Check that the connection on the injector rail is fitted. Try that first
No I know what injectors are, I'm a mechanic but I glanced at injector and it looked in and ok as I pushed top of it to check but only quick, so it may be ok.
What makes you say it's the injector?
If it's missfireing it could be spark, fuel or compression right?
So if compression is there cos it cleared with codes last time, fuel maybe there as it smells strong of fuel when missing, it could be faulty plug or coil pack that I bought?
What about those codes tells you injector?
Thanks alot for your help
What makes you say it's the injector?
If it's missfireing it could be spark, fuel or compression right?
So if compression is there cos it cleared with codes last time, fuel maybe there as it smells strong of fuel when missing, it could be faulty plug or coil pack that I bought?
What about those codes tells you injector?
Thanks alot for your help
The codes you gave me are faults for cylinder 1. Code P0201 is Cylinder 1 Injector circuit fault in Electrical circuit. Code P0301 is Cylinder 1 misfire detected. So both of these would indicate to me that the misfire would be caused by an electrical fault in the injector circuit. Hope this helps? The final code P1433 is secondary air injection system pump relay circuit open. I would guess that the injector is not operating because it is not receiving power. It will still receive fuel hence the smell but won't be able to inject the fuel because there is no power going to it. The misfire is most definitely on cylinder 1.
There is an electrical fault in injector No1 most definitely. If it cleared the fault the first time but not the second time I would retrace your steps. If no injector was touched I would think there is a fault with any connections.
It could be they are known to have weak or poorly positioned earthing. Having had a VW Polo before I am shocked at how little wiring they use. With VW there was a degree of play with Seat it is to the mm. Can easily see wire's being pulled.
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