Stuttering at full throttle
#1
Stuttering at full throttle
Hey gents, I am having a problem with my 08 Evo X. When I give it full throttle, my car stutters and does not give full power. Also my A/F is at 14 or so while it is stuttering. I just changed my spark plugs and that helped a little. Thought it was the tune but went back to a tune that I had no problems with and nothing changed. The car has 35k miles on it and I have not done the 30k maintenance on it. I am not sure if that would really cause it. My friend and I think it may be something with the fuel system(i.e> injectors, fuel rail or filter) since I go so lean when I give it full throttle but we are just guessing. What do you guys think it could be?
Cliffs:
Car stutters at full throttle
changed spark plugs and its not the tune
need to do 30K maint(car has 35K miles)
think it may be injectors, fuel rail or maybe fuel filter but thats just a guess.
What could it be?
Cliffs:
Car stutters at full throttle
changed spark plugs and its not the tune
need to do 30K maint(car has 35K miles)
think it may be injectors, fuel rail or maybe fuel filter but thats just a guess.
What could it be?
#2
Hey gents, I am having a problem with my 08 Evo X. When I give it full throttle, my car stutters and does not give full power. Also my A/F is at 14 or so while it is stuttering. I just changed my spark plugs and that helped a little. Thought it was the tune but went back to a tune that I had no problems with and nothing changed. The car has 35k miles on it and I have not done the 30k maintenance on it. I am not sure if that would really cause it. My friend and I think it may be something with the fuel system(i.e> injectors, fuel rail or filter) since I go so lean when I give it full throttle but we are just guessing. What do you guys think it could be?
Cliffs:
Car stutters at full throttle
changed spark plugs and its not the tune
need to do 30K maint(car has 35K miles)
think it may be injectors, fuel rail or maybe fuel filter but thats just a guess.
What could it be?
Cliffs:
Car stutters at full throttle
changed spark plugs and its not the tune
need to do 30K maint(car has 35K miles)
think it may be injectors, fuel rail or maybe fuel filter but thats just a guess.
What could it be?
#4
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Join Date: Jul 2009
Location: Colorado Springs, CO
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I had a severe stuttering all of a sudden on my Evo 9, and it turned out to be the spark plug coils (ignition coils.) They weren't firing efficiently, therefore essentially missing. Replacing them solved it for me. But this may be different.
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#10
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That was happening to me last summer. It turned out to be a disconnected vacuum hose that connects to the fuel pressure regulator. It was popping out of place every once in a while, so i used a zip tie to keep it in place and it hasn't happened ever since. Might not be it but couldn't hurt to look.
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