Engine Surging?

[Anquetil]

Hi Guys, my engine seems to be surging when on idle. Its been getting slightly more noticable over recent months. Other than that it still responsive when cruising and redlining.

Is this normal at all?

Any ideas as to what this could be, timing? fuel lines/fuel pump? head gasket?

I can probably do a little video of it, if it helps?

Cheers

[paydro]

i mate of mine had the same trouble with an r31 he had put a bov in only recently and thats when it started a he got told it had something to do with his afm

[Anquetil]

Mine does have a Turbosmart Type II BOV, was already on their when I bought it though.

[paydro]

sorry man cant help ya then but you'll find its proberly something real simple checked vac hose and the rest

[Anquetil]

Was checking hoses around the BOV and AFM this morning, removed and refitted again to be sure.

Here is a video, it surges about 4 times in this clip usually every 4-5 seconds.

Its nothing major, but still would like to know what on earth causes it.

[Craved]

heard of a similar issue on an RB engine, turned out to be the seals aroung the injectors!! i think they tested it with rp7 or wd40 spraying that near the injectors, when sprayed it smoothed out the idle then returned to rough idle, just an idea!!!

think it was in an HPI mag a while back!

[Bleach1]

I have a similar problem that sometimes appears. I will come to a stop and the engine will idle and sort of surge or hunt from the 500 to 900 rpm range. If i then just tap the throttle again it goes away. My engine is totally stock. Suspect the AFM?

[MegaGTS4]

Have you guys checked the AAC valve?

check out this thread, might help!

http://www.skylinesaustralia.com/forums/sh...&threadid=19569

or do a search on the aac valve in the maintenance section!

MEGA