I just removed all 4 coil packs and tested the ohms and they are all giving exactly the same reading. I did notice that the insulation around the connectors on the inside wasn't to bright , so I sorted that out and the car is running 99% better now. I can still very , very slightly feel a little bit of a hold back through max boost , but allmost not noticeable.
Surely if one of the coil packs was faulty , I would have picked it up on the resistance readings ?
These coil packs are known to only get dodgy when hot....when cold all seems fine....
Have you pulled your plugs to se what they tell you?
The plugs had only done 2000 km's , but I replace them and the fuel filter again just for safety sake.
I don't mean you must replace them, I mean take them out and see whether they are carbon fouled.....read the plugs.....make sure you note what plug goes where....the see on what coil or so forth there might be a problem.
I replaced them 2 weeks ago when this crap started, so as to eliminate the basics.
The plugs are fine
So are you saying all 4 plugs looked the same when you took it out....same amount of carbon and deposites?
If all of them had alot of carbon and the same amount on....then it is not a spicific coil.....do you get what I am trying to say....
Yes the old plugs still looked new and now the new plugs after 500 km's also still look new. They all look the same.
Just when I thought I had sorted it out , it is still there , not so bad , but there. The strange thing is if you accelerate slowly then it's okay , but if you boot it , then the miss is very prominent !
I still think that it has something to do with the fuelling. Is there another to check the coil packs , besides checking the resistance and or buying new ones at a plaas se prys ?
is it from cold start up or still when it heats up
Seems fine when she is cold. The moment it heats up the miss starts.
I have just this minute taken out all the plugs again to double check and they all look identical. There is no more or less carbon build up on any of the plugs. So now I am entirely baffled. The plugs are all identical.
if you think about it if a coil stops sparking while driving its not gonna change on the plug coz the petrol wil just not burn and piss out the xhaust
dis hoe ek dit sien
just for safety try check your feul presure but my money still on the coil
........ but which one ?
That is the million dollar question.
Thanks for your help. I will try and organise some spares and then swop out and test.
Cheers
If one coil stops working you will know it....it will be more than a miss.....if the combustion is weaker on one piston because of weak spark you will notice a change on one plug, meaning if not all fuel is burnt you will have a change in that one plug, most propably more carbon.
I think whatever is causing your issue is not just on one piston.....have you checked you injector harness.....are they all getting the right signal....
I wouldn't know how to check if the injectors are getting the right signal or not.
However, I changed the plugs (BCPR7ES) again on Friday and took the removed plugs (BCPR6ES) to a buddy of mine who has a workshop. I also asked him to drive the car.
He agreed with me on driving the car that it seems like fuel starvation. The plugs show that the car is running lean aswell. We also looked on a wall chart for different spark plug fouling and reasons , and the picture identical to my plugs , says - additives added. Lightbulb !! I put in 1 of those fuel tablets on 2 or 3 occassions a couple of weeks ago and that is when the missing started. So we thought maybe that crap had blocked up the fuel pump's filter, so I put in a bottle of injector cleaner and the car was much better.
This morning I removed the fuel pump and the filter looked quite fouled , but I am sure that if such a filter is available it will be 50 Gazillion Zim dollars at Nissan , so I removed the filter completely to test the car for the next 2 days. I have driven her twice this morning after having removed the filter and there is no miss at all. Here's hoping for the best.
Latest update , after being pretty sure that it was the fuel pump filter that was causing the crap, I got in the car to go home last night and it was worse than ever. Can't boost at all. The moment I start to boost it holds back and misfires. I am going to now rob a bank somewhere and get a Walbro pump at some point . If that doesn't work then I will #^% myself and look further.
I can't see it being a bad thing to upgrade the pump anyway.
Andrew.200SX wrote:
Latest update , after being pretty sure that it was the fuel pump filter that was causing the crap, I got in the car to go home last night and it was worse than ever. Can't boost at all. The moment I start to boost it holds back and misfires. I am going to now rob a bank somewhere and get a Walbro pump at some point . If that doesn't work then I will #^% myself and look a further.
I can't see it being a bad thing to upgrade the pump anyway.
Good idea!
Why is it , if I boot it from pull off , 7500 rpm through 1st , 2nd , 3rd , 4th .... no miss , but drive normally and then boot it and it misses ?
Andrew.200SX wrote:
Why is it , if I boot it from pull off , 7500 rpm through 1st , 2nd , 3rd , 4th .... no miss , but drive normally and then boot it and it misses ?
Get yourself a fpr with a gauge so you can see what your fuel pressure does.
Where you from?
I have a business in Woodstock , Cape Town , but strangely enough I live right around the corner from Faheem - FSR.
I just never get time to go to Faheem for some assistance , and I also like to do everything myself.
What is the easiest - cheapest way to check the fuel pressure and fuel pressure regulator ?
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