S14a flatspot

[lsd32]

Lads my s14a has a flat spot or a small bit of a hesitation between 3k and 4k,pulls like a train over them revs its like a small miss or hesitation just between them revs,I changed plugs and checked for boost leaks,any thoughts??

[lsd32]

Any ideas??

[gem-s13]

has it still got the vvt spocket fitted??

[robbie@tdp.ie]

Lads my s14a has a flat spot or a small bit of a hesitation between 3k and 4k,pulls like a train over them revs its like a small miss or hesitation just between them revs,I changed plugs and checked for boost leaks,any thoughts??

Is it mapped ?

What AFM has it got ?

What Boost is it making ?

What plugs are you using ?

What plug spark gap have they got ?

Regards

Robbie

[Boo s13]

Had this before turned out my fuel pump was on the way out

[lsd32]

Still has the vvt sprocket fitted
Fully standard engine running standard boost,and afm on standard map
Totally standard car plugs are ngk bcr8es

[robbie@tdp.ie]

Still has the vvt sprocket fitted
Fully standard engine running standard boost,and afm on standard map
Totally standard car plugs are ngk bcr8es

Try a plug gap like 0.6mm and see if it improves. If it dose then it may be running too rich or too lean and a quick spin on the dyno would find the problem straight away instead of spending loads changing parts.

Robbie

[matt-p]

I had this problem with mine...

It turned out to be the Air Flow meter was dirty , took it out oppened it and cleanned the little resistor with a cotton bud , put it back in and car was perfect....

Mine is N/A tho but its worth a try in yours as its a ten min job

[Bradley_Motorworks]

Possible knock sensor fault...

[batman026]

i had this problem and changed the fuel filter and that sorted it/also make sure you dont have a boost leak anywhere