Focus RS Misfiring at 4000rpm
#1
Focus RS Misfiring at 4000rpm
My Focus RS is not holding full boost and misfires between 3500-4000rpm its only since i was driving it home straight after buying it the temperature light came on and i descovered a water leak which is now sorted!
HELP FOLKS
HELP FOLKS
Trending Topics
#8
I've found that life I needed.. It's HERE!!
Join Date: Dec 2006
Location: oxford
Posts: 1,374
Likes: 0
Received 0 Likes
on
0 Posts
Can be the map lots of people complain about this on rsoc, there are many threads relating to the first OE map and the later AE map which apparently got rid of this issue.
#9
...............
First things to check are plugs & leads, check the plug gap and gap as necccessary. I run at 0.7 gap, any more than that gives a missfire on boost. There's lots of debate on what plugs should be used, some tuners recommend using std Ford plugs, some prefer Denso Iridiums. I tried the Iridiums in mine and had no probs but there were a few people who had problems with them dropping the centre electrode, probably caused by ham-fisted gapping technique more than a fault with the plug, I switched back to std Ford plugs and have had no problems running 300+.
Also, as you don't know the history, I would check how much boost you're running, connect up a temporary boost guage if necessary.
#10
Too many posts.. I need a life!!
Join Date: Nov 2009
Location: barnsley
Posts: 848
Likes: 0
Received 0 Likes
on
0 Posts
Known as the 4k cough,
What maps it running?
Also if the high temp light has come on im sorry to say you need to get the hg done,
As std they run about 112 degress,
The high temp light dont come on until 118 degs
What maps it running?
Also if the high temp light has come on im sorry to say you need to get the hg done,
As std they run about 112 degress,
The high temp light dont come on until 118 degs
#12
PassionFord Post Whore!!
Is there an easy way of checking what map an RS is running?
Thread
Thread Starter
Forum
Replies
Last Post