Spark Plug change miracles
#1
Spark Plug change miracles
Loki started to get a miss under full acceleration and part acceleration above 4k RPM.
I thought it might be plugs but was not sure. 2 weeks later I got a CEL and the code was cylinder 3 & 4 misfire.
Thought this was bad because I was suspecting only one plug was bad and this issue might be something else.
I changed plugs yesterday and all problems fixed with CEL gone and no miss anymore.
Lots of power right up to red line.
I thought it might be plugs but was not sure. 2 weeks later I got a CEL and the code was cylinder 3 & 4 misfire.
Thought this was bad because I was suspecting only one plug was bad and this issue might be something else.
I changed plugs yesterday and all problems fixed with CEL gone and no miss anymore.
Lots of power right up to red line.
The following 3 users liked this post by minidd99:
#2
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#4
Anyone have any ideas where I should go from here without tearing things apart??
#7
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#10
What was the actual fuel pressure? From doing some reading on here, for the High pressure fuel pump it should be in the 600-800 psi range.
#11
I will answer both previous questions.
First the spark plugs probably have 90,000 kms or (55,000 miles) on them. I just recently bought the car and have no prior service history but I am thinking they were the original plugs.
The old plugs surprisingly did not look that bad. Pull your plugs and have a look at them, lots of good Utube videos on reading spark plugs.
When we checked the fuel pressure it was in the 5000 kpa to 7000 kpa or (750 to 1000 psi) range which is higher than the 600 to 800 psi you have found. When you are driving the graph on the scanning tool has some delay but it seemed to stay in this range so we felt it was in the correct range as it is close to what Ford recommends for its direct injection engines.
First the spark plugs probably have 90,000 kms or (55,000 miles) on them. I just recently bought the car and have no prior service history but I am thinking they were the original plugs.
The old plugs surprisingly did not look that bad. Pull your plugs and have a look at them, lots of good Utube videos on reading spark plugs.
When we checked the fuel pressure it was in the 5000 kpa to 7000 kpa or (750 to 1000 psi) range which is higher than the 600 to 800 psi you have found. When you are driving the graph on the scanning tool has some delay but it seemed to stay in this range so we felt it was in the correct range as it is close to what Ford recommends for its direct injection engines.
The following users liked this post:
F56-JCDub (11-07-2018)
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